/**
+ * @author Ed Spencer
+ * @class Ext.data.Store
+ * @extends Ext.data.AbstractStore
+ *
+ * <p>The Store class encapsulates a client side cache of {@link Ext.data.Model Model} objects. Stores load
+ * data via a {@link Ext.data.proxy.Proxy Proxy}, and also provide functions for {@link #sort sorting},
+ * {@link #filter filtering} and querying the {@link Ext.data.Model model} instances contained within it.</p>
+ *
+ * <p>Creating a Store is easy - we just tell it the Model and the Proxy to use to load and save its data:</p>
+ *
+<pre><code>
+// Set up a {@link Ext.data.Model model} to use in our Store
+Ext.define('User', {
+ extend: 'Ext.data.Model',
+ fields: [
+ {name: 'firstName', type: 'string'},
+ {name: 'lastName', type: 'string'},
+ {name: 'age', type: 'int'},
+ {name: 'eyeColor', type: 'string'}
+ ]
+});
+
+var myStore = new Ext.data.Store({
+ model: 'User',
+ proxy: {
+ type: 'ajax',
+ url : '/users.json',
+ reader: {
+ type: 'json',
+ root: 'users'
+ }
+ },
+ autoLoad: true
+});
+</code></pre>
+
+ * <p>In the example above we configured an AJAX proxy to load data from the url '/users.json'. We told our Proxy
+ * to use a {@link Ext.data.reader.Json JsonReader} to parse the response from the server into Model object -
+ * {@link Ext.data.reader.Json see the docs on JsonReader} for details.</p>
+ *
+ * <p><u>Inline data</u></p>
+ *
+ * <p>Stores can also load data inline. Internally, Store converts each of the objects we pass in as {@link #data}
+ * into Model instances:</p>
+ *
+<pre><code>
+new Ext.data.Store({
+ model: 'User',
+ data : [
+ {firstName: 'Ed', lastName: 'Spencer'},
+ {firstName: 'Tommy', lastName: 'Maintz'},
+ {firstName: 'Aaron', lastName: 'Conran'},
+ {firstName: 'Jamie', lastName: 'Avins'}
+ ]
+});
+</code></pre>
+ *
+ * <p>Loading inline data using the method above is great if the data is in the correct format already (e.g. it doesn't need
+ * to be processed by a {@link Ext.data.reader.Reader reader}). If your inline data requires processing to decode the data structure,
+ * use a {@link Ext.data.proxy.Memory MemoryProxy} instead (see the {@link Ext.data.proxy.Memory MemoryProxy} docs for an example).</p>
+ *
+ * <p>Additional data can also be loaded locally using {@link #add}.</p>
+ *
+ * <p><u>Loading Nested Data</u></p>
+ *
+ * <p>Applications often need to load sets of associated data - for example a CRM system might load a User and her Orders.
+ * Instead of issuing an AJAX request for the User and a series of additional AJAX requests for each Order, we can load a nested dataset
+ * and allow the Reader to automatically populate the associated models. Below is a brief example, see the {@link Ext.data.reader.Reader} intro
+ * docs for a full explanation:</p>
+ *
+<pre><code>
+var store = new Ext.data.Store({
+ autoLoad: true,
+ model: "User",
+ proxy: {
+ type: 'ajax',
+ url : 'users.json',
+ reader: {
+ type: 'json',
+ root: 'users'
+ }
+ }
+});
+</code></pre>
+ *
+ * <p>Which would consume a response like this:</p>
+ *
+<pre><code>
+{
+ "users": [
+ {
+ "id": 1,
+ "name": "Ed",
+ "orders": [
+ {
+ "id": 10,
+ "total": 10.76,
+ "status": "invoiced"
+ },
+ {
+ "id": 11,
+ "total": 13.45,
+ "status": "shipped"
+ }
+ ]
+ }
+ ]
+}
+</code></pre>
+ *
+ * <p>See the {@link Ext.data.reader.Reader} intro docs for a full explanation.</p>
+ *
+ * <p><u>Filtering and Sorting</u></p>
+ *
+ * <p>Stores can be sorted and filtered - in both cases either remotely or locally. The {@link #sorters} and {@link #filters} are
+ * held inside {@link Ext.util.MixedCollection MixedCollection} instances to make them easy to manage. Usually it is sufficient to
+ * either just specify sorters and filters in the Store configuration or call {@link #sort} or {@link #filter}:
+ *
+<pre><code>
+var store = new Ext.data.Store({
+ model: 'User',
+ sorters: [
+ {
+ property : 'age',
+ direction: 'DESC'
+ },
+ {
+ property : 'firstName',
+ direction: 'ASC'
+ }
+ ],
+
+ filters: [
+ {
+ property: 'firstName',
+ value : /Ed/
+ }
+ ]
+});
+</code></pre>
+ *
+ * <p>The new Store will keep the configured sorters and filters in the MixedCollection instances mentioned above. By default, sorting
+ * and filtering are both performed locally by the Store - see {@link #remoteSort} and {@link #remoteFilter} to allow the server to
+ * perform these operations instead.</p>
+ *
+ * <p>Filtering and sorting after the Store has been instantiated is also easy. Calling {@link #filter} adds another filter to the Store
+ * and automatically filters the dataset (calling {@link #filter} with no arguments simply re-applies all existing filters). Note that by
+ * default {@link #sortOnFilter} is set to true, which means that your sorters are automatically reapplied if using local sorting.</p>
+ *
+<pre><code>
+store.filter('eyeColor', 'Brown');
+</code></pre>
+ *
+ * <p>Change the sorting at any time by calling {@link #sort}:</p>
+ *
+<pre><code>
+store.sort('height', 'ASC');
+</code></pre>
+ *
+ * <p>Note that all existing sorters will be removed in favor of the new sorter data (if {@link #sort} is called with no arguments,
+ * the existing sorters are just reapplied instead of being removed). To keep existing sorters and add new ones, just add them
+ * to the MixedCollection:</p>
+ *
+<pre><code>
+store.sorters.add(new Ext.util.Sorter({
+ property : 'shoeSize',
+ direction: 'ASC'
+}));
+
+store.sort();
+</code></pre>
+ *
+ * <p><u>Registering with StoreManager</u></p>
+ *
+ * <p>Any Store that is instantiated with a {@link #storeId} will automatically be registed with the {@link Ext.data.StoreManager StoreManager}.
+ * This makes it easy to reuse the same store in multiple views:</p>
+ *
+ <pre><code>
+//this store can be used several times
+new Ext.data.Store({
+ model: 'User',
+ storeId: 'usersStore'
+});
+
+new Ext.List({
+ store: 'usersStore',
+
+ //other config goes here
+});
+
+new Ext.view.View({
+ store: 'usersStore',
+
+ //other config goes here
+});
+</code></pre>
+ *
+ * <p><u>Further Reading</u></p>
+ *
+ * <p>Stores are backed up by an ecosystem of classes that enables their operation. To gain a full understanding of these
+ * pieces and how they fit together, see:</p>
+ *
+ * <ul style="list-style-type: disc; padding-left: 25px">
+ * <li>{@link Ext.data.proxy.Proxy Proxy} - overview of what Proxies are and how they are used</li>
+ * <li>{@link Ext.data.Model Model} - the core class in the data package</li>
+ * <li>{@link Ext.data.reader.Reader Reader} - used by any subclass of {@link Ext.data.proxy.Server ServerProxy} to read a response</li>
+ * </ul>
+ *
+ * @constructor
+ * @param {Object} config Optional config object
+ */
+Ext.define('Ext.data.Store', {
+ extend: 'Ext.data.AbstractStore',
+
+ alias: 'store.store',
+
+ requires: ['Ext.ModelManager', 'Ext.data.Model', 'Ext.util.Grouper'],
+ uses: ['Ext.data.proxy.Memory'],
+
+ /**
+ * @cfg {Boolean} remoteSort
+ * True to defer any sorting operation to the server. If false, sorting is done locally on the client. Defaults to <tt>false</tt>.
+ */
+ remoteSort: false,
+
+ /**
+ * @cfg {Boolean} remoteFilter
+ * True to defer any filtering operation to the server. If false, filtering is done locally on the client. Defaults to <tt>false</tt>.
+ */
+ remoteFilter: false,
+
+ /**
+ * @cfg {Boolean} remoteGroup
+ * True if the grouping should apply on the server side, false if it is local only (defaults to false). If the
+ * grouping is local, it can be applied immediately to the data. If it is remote, then it will simply act as a
+ * helper, automatically sending the grouping information to the server.
+ */
+ remoteGroup : false,
+
+ /**
+ * @cfg {String/Ext.data.proxy.Proxy/Object} proxy The Proxy to use for this Store. This can be either a string, a config
+ * object or a Proxy instance - see {@link #setProxy} for details.
+ */
+
+ /**
+ * @cfg {Array} data Optional array of Model instances or data objects to load locally. See "Inline data" above for details.
+ */
+
+ /**
+ * @cfg {String} model The {@link Ext.data.Model} associated with this store
+ */
+
+ /**
+ * The (optional) field by which to group data in the store. Internally, grouping is very similar to sorting - the
+ * groupField and {@link #groupDir} are injected as the first sorter (see {@link #sort}). Stores support a single
+ * level of grouping, and groups can be fetched via the {@link #getGroups} method.
+ * @property groupField
+ * @type String
+ */
+ groupField: undefined,
+
+ /**
+ * The direction in which sorting should be applied when grouping. Defaults to "ASC" - the other supported value is "DESC"
+ * @property groupDir
+ * @type String
+ */
+ groupDir: "ASC",
+
+ /**
+ * The number of records considered to form a 'page'. This is used to power the built-in
+ * paging using the nextPage and previousPage functions. Defaults to 25.
+ * @property pageSize
+ * @type Number
+ */
+ pageSize: 25,
+
+ /**
+ * The page that the Store has most recently loaded (see {@link #loadPage})
+ * @property currentPage
+ * @type Number
+ */
+ currentPage: 1,
+
+ /**
+ * @cfg {Boolean} clearOnPageLoad True to empty the store when loading another page via {@link #loadPage},
+ * {@link #nextPage} or {@link #previousPage} (defaults to true). Setting to false keeps existing records, allowing
+ * large data sets to be loaded one page at a time but rendered all together.
+ */
+ clearOnPageLoad: true,
+
+ /**
+ * True if the Store is currently loading via its Proxy
+ * @property loading
+ * @type Boolean
+ * @private
+ */
+ loading: false,
+
+ /**
+ * @cfg {Boolean} sortOnFilter For local filtering only, causes {@link #sort} to be called whenever {@link #filter} is called,
+ * causing the sorters to be reapplied after filtering. Defaults to true
+ */
+ sortOnFilter: true,
+
+ /**
+ * @cfg {Boolean} buffered
+ * Allow the store to buffer and pre-fetch pages of records. This is to be used in conjunction with a view will
+ * tell the store to pre-fetch records ahead of a time.
+ */
+ buffered: false,
+
+ /**
+ * @cfg {Number} purgePageCount
+ * The number of pages to keep in the cache before purging additional records. A value of 0 indicates to never purge the prefetched data.
+ * This option is only relevant when the {@link #buffered} option is set to true.
+ */
+ purgePageCount: 5,
+
+ isStore: true,
+
+ //documented above
+ constructor: function(config) {
+ config = config || {};
+
+ var me = this,
+ groupers = config.groupers,
+ proxy,
+ data;
+
+ if (config.buffered || me.buffered) {
+ me.prefetchData = Ext.create('Ext.util.MixedCollection', false, function(record) {
+ return record.index;
+ });
+ me.pendingRequests = [];
+ me.pagesRequested = [];
+
+ me.sortOnLoad = false;
+ me.filterOnLoad = false;
+ }
+
+ me.addEvents(
+ /**
+ * @event beforeprefetch
+ * Fires before a prefetch occurs. Return false to cancel.
+ * @param {Ext.data.store} this
+ * @param {Ext.data.Operation} operation The associated operation
+ */
+ 'beforeprefetch',
+ /**
+ * @event groupchange
+ * Fired whenever the grouping in the grid changes
+ * @param {Ext.data.Store} store The store
+ * @param {Array} groupers The array of grouper objects
+ */
+ 'groupchange',
+ /**
+ * @event load
+ * Fires whenever records have been prefetched
+ * @param {Ext.data.store} this
+ * @param {Array} records An array of records
+ * @param {Boolean} successful True if the operation was successful.
+ * @param {Ext.data.Operation} operation The associated operation
+ */
+ 'prefetch'
+ );
+ data = config.data || me.data;
+
+ /**
+ * The MixedCollection that holds this store's local cache of records
+ * @property data
+ * @type Ext.util.MixedCollection
+ */
+ me.data = Ext.create('Ext.util.MixedCollection', false, function(record) {
+ return record.internalId;
+ });
+
+ if (data) {
+ me.inlineData = data;
+ delete config.data;
+ }
+
+ if (!groupers && config.groupField) {
+ groupers = [{
+ property : config.groupField,
+ direction: config.groupDir
+ }];
+ }
+ delete config.groupers;
+
+ /**
+ * The collection of {@link Ext.util.Grouper Groupers} currently applied to this Store
+ * @property groupers
+ * @type Ext.util.MixedCollection
+ */
+ me.groupers = Ext.create('Ext.util.MixedCollection');
+ me.groupers.addAll(me.decodeGroupers(groupers));
+
+ this.callParent([config]);
+
+ if (me.groupers.items.length) {
+ me.sort(me.groupers.items, 'prepend', false);
+ }
+
+ proxy = me.proxy;
+ data = me.inlineData;
+
+ if (data) {
+ if (proxy instanceof Ext.data.proxy.Memory) {
+ proxy.data = data;
+ me.read();
+ } else {
+ me.add.apply(me, data);
+ }
+
+ me.sort();
+ delete me.inlineData;
+ } else if (me.autoLoad) {
+ Ext.defer(me.load, 10, me, [typeof me.autoLoad === 'object' ? me.autoLoad: undefined]);
+ // Remove the defer call, we may need reinstate this at some point, but currently it's not obvious why it's here.
+ // this.load(typeof this.autoLoad == 'object' ? this.autoLoad : undefined);
+ }
+ },
+
+ onBeforeSort: function() {
+ this.sort(this.groupers.items, 'prepend', false);
+ },
+
+ /**
+ * @private
+ * Normalizes an array of grouper objects, ensuring that they are all Ext.util.Grouper instances
+ * @param {Array} groupers The groupers array
+ * @return {Array} Array of Ext.util.Grouper objects
+ */
+ decodeGroupers: function(groupers) {
+ if (!Ext.isArray(groupers)) {
+ if (groupers === undefined) {
+ groupers = [];
+ } else {
+ groupers = [groupers];
+ }
+ }
+
+ var length = groupers.length,
+ Grouper = Ext.util.Grouper,
+ config, i;
+
+ for (i = 0; i < length; i++) {
+ config = groupers[i];
+
+ if (!(config instanceof Grouper)) {
+ if (Ext.isString(config)) {
+ config = {
+ property: config
+ };
+ }
+
+ Ext.applyIf(config, {
+ root : 'data',
+ direction: "ASC"
+ });
+
+ //support for 3.x style sorters where a function can be defined as 'fn'
+ if (config.fn) {
+ config.sorterFn = config.fn;
+ }
+
+ //support a function to be passed as a sorter definition
+ if (typeof config == 'function') {
+ config = {
+ sorterFn: config
+ };
+ }
+
+ groupers[i] = new Grouper(config);
+ }
+ }
+
+ return groupers;
+ },
+
+ /**
+ * Group data in the store
+ * @param {String|Array} groupers Either a string name of one of the fields in this Store's configured {@link Ext.data.Model Model},
+ * or an Array of grouper configurations.
+ * @param {String} direction The overall direction to group the data by. Defaults to "ASC".
+ */
+ group: function(groupers, direction) {
+ var me = this,
+ grouper,
+ newGroupers;
+
+ if (Ext.isArray(groupers)) {
+ newGroupers = groupers;
+ } else if (Ext.isObject(groupers)) {
+ newGroupers = [groupers];
+ } else if (Ext.isString(groupers)) {
+ grouper = me.groupers.get(groupers);
+
+ if (!grouper) {
+ grouper = {
+ property : groupers,
+ direction: direction
+ };
+ newGroupers = [grouper];
+ } else if (direction === undefined) {
+ grouper.toggle();
+ } else {
+ grouper.setDirection(direction);
+ }
+ }
+
+ if (newGroupers && newGroupers.length) {
+ newGroupers = me.decodeGroupers(newGroupers);
+ me.groupers.clear();
+ me.groupers.addAll(newGroupers);
+ }
+
+ if (me.remoteGroup) {
+ me.load({
+ scope: me,
+ callback: me.fireGroupChange
+ });
+ } else {
+ me.sort();
+ me.fireEvent('groupchange', me, me.groupers);
+ }
+ },
+
+ /**
+ * Clear any groupers in the store
+ */
+ clearGrouping: function(){
+ var me = this;
+ // Clear any groupers we pushed on to the sorters
+ me.groupers.each(function(grouper){
+ me.sorters.remove(grouper);
+ });
+ me.groupers.clear();
+ if (me.remoteGroup) {
+ me.load({
+ scope: me,
+ callback: me.fireGroupChange
+ });
+ } else {
+ me.sort();
+ me.fireEvent('groupchange', me, me.groupers);
+ }
+ },
+
+ /**
+ * Checks if the store is currently grouped
+ * @return {Boolean} True if the store is grouped.
+ */
+ isGrouped: function() {
+ return this.groupers.getCount() > 0;
+ },
+
+ /**
+ * Fires the groupchange event. Abstracted out so we can use it
+ * as a callback
+ * @private
+ */
+ fireGroupChange: function(){
+ this.fireEvent('groupchange', this, this.groupers);
+ },
+
+ /**
+ * Returns an object containing the result of applying grouping to the records in this store. See {@link #groupField},
+ * {@link #groupDir} and {@link #getGroupString}. Example for a store containing records with a color field:
+<pre><code>
+var myStore = new Ext.data.Store({
+ groupField: 'color',
+ groupDir : 'DESC'
+});
+
+myStore.getGroups(); //returns:
+[
+ {
+ name: 'yellow',
+ children: [
+ //all records where the color field is 'yellow'
+ ]
+ },
+ {
+ name: 'red',
+ children: [
+ //all records where the color field is 'red'
+ ]
+ }
+]
+</code></pre>
+ * @param {String} groupName (Optional) Pass in an optional groupName argument to access a specific group as defined by {@link #getGroupString}
+ * @return {Array} The grouped data
+ */
+ getGroups: function(requestGroupString) {
+ var records = this.data.items,
+ length = records.length,
+ groups = [],
+ pointers = {},
+ record,
+ groupStr,
+ group,
+ i;
+
+ for (i = 0; i < length; i++) {
+ record = records[i];
+ groupStr = this.getGroupString(record);
+ group = pointers[groupStr];
+
+ if (group === undefined) {
+ group = {
+ name: groupStr,
+ children: []
+ };
+
+ groups.push(group);
+ pointers[groupStr] = group;
+ }
+
+ group.children.push(record);
+ }
+
+ return requestGroupString ? pointers[requestGroupString] : groups;
+ },
+
+ /**
+ * @private
+ * For a given set of records and a Grouper, returns an array of arrays - each of which is the set of records
+ * matching a certain group.
+ */
+ getGroupsForGrouper: function(records, grouper) {
+ var length = records.length,
+ groups = [],
+ oldValue,
+ newValue,
+ record,
+ group,
+ i;
+
+ for (i = 0; i < length; i++) {
+ record = records[i];
+ newValue = grouper.getGroupString(record);
+
+ if (newValue !== oldValue) {
+ group = {
+ name: newValue,
+ grouper: grouper,
+ records: []
+ };
+ groups.push(group);
+ }
+
+ group.records.push(record);
+
+ oldValue = newValue;
+ }
+
+ return groups;
+ },
+
+ /**
+ * @private
+ * This is used recursively to gather the records into the configured Groupers. The data MUST have been sorted for
+ * this to work properly (see {@link #getGroupData} and {@link #getGroupsForGrouper}) Most of the work is done by
+ * {@link #getGroupsForGrouper} - this function largely just handles the recursion.
+ * @param {Array} records The set or subset of records to group
+ * @param {Number} grouperIndex The grouper index to retrieve
+ * @return {Array} The grouped records
+ */
+ getGroupsForGrouperIndex: function(records, grouperIndex) {
+ var me = this,
+ groupers = me.groupers,
+ grouper = groupers.getAt(grouperIndex),
+ groups = me.getGroupsForGrouper(records, grouper),
+ length = groups.length,
+ i;
+
+ if (grouperIndex + 1 < groupers.length) {
+ for (i = 0; i < length; i++) {
+ groups[i].children = me.getGroupsForGrouperIndex(groups[i].records, grouperIndex + 1);
+ }
+ }
+
+ for (i = 0; i < length; i++) {
+ groups[i].depth = grouperIndex;
+ }
+
+ return groups;
+ },
+
+ /**
+ * @private
+ * <p>Returns records grouped by the configured {@link #groupers grouper} configuration. Sample return value (in
+ * this case grouping by genre and then author in a fictional books dataset):</p>
+<pre><code>
+[
+ {
+ name: 'Fantasy',
+ depth: 0,
+ records: [
+ //book1, book2, book3, book4
+ ],
+ children: [
+ {
+ name: 'Rowling',
+ depth: 1,
+ records: [
+ //book1, book2
+ ]
+ },
+ {
+ name: 'Tolkein',
+ depth: 1,
+ records: [
+ //book3, book4
+ ]
+ }
+ ]
+ }
+]
+</code></pre>
+ * @param {Boolean} sort True to call {@link #sort} before finding groups. Sorting is required to make grouping
+ * function correctly so this should only be set to false if the Store is known to already be sorted correctly
+ * (defaults to true)
+ * @return {Array} The group data
+ */
+ getGroupData: function(sort) {
+ var me = this;
+ if (sort !== false) {
+ me.sort();
+ }
+
+ return me.getGroupsForGrouperIndex(me.data.items, 0);
+ },
+
+ /**
+ * <p>Returns the string to group on for a given model instance. The default implementation of this method returns
+ * the model's {@link #groupField}, but this can be overridden to group by an arbitrary string. For example, to
+ * group by the first letter of a model's 'name' field, use the following code:</p>
+<pre><code>
+new Ext.data.Store({
+ groupDir: 'ASC',
+ getGroupString: function(instance) {
+ return instance.get('name')[0];
+ }
+});
+</code></pre>
+ * @param {Ext.data.Model} instance The model instance
+ * @return {String} The string to compare when forming groups
+ */
+ getGroupString: function(instance) {
+ var group = this.groupers.first();
+ if (group) {
+ return instance.get(group.property);
+ }
+ return '';
+ },
+ /**
+ * Inserts Model instances into the Store at the given index and fires the {@link #add} event.
+ * See also <code>{@link #add}</code>.
+ * @param {Number} index The start index at which to insert the passed Records.
+ * @param {Ext.data.Model[]} records An Array of Ext.data.Model objects to add to the cache.
+ */
+ insert: function(index, records) {
+ var me = this,
+ sync = false,
+ i,
+ record,
+ len;
+
+ records = [].concat(records);
+ for (i = 0, len = records.length; i < len; i++) {
+ record = me.createModel(records[i]);
+ record.set(me.modelDefaults);
+ // reassign the model in the array in case it wasn't created yet
+ records[i] = record;
+
+ me.data.insert(index + i, record);
+ record.join(me);
+
+ sync = sync || record.phantom === true;
+ }
+
+ if (me.snapshot) {
+ me.snapshot.addAll(records);
+ }
+
+ me.fireEvent('add', me, records, index);
+ me.fireEvent('datachanged', me);
+ if (me.autoSync && sync) {
+ me.sync();
+ }
+ },
+
+ /**
+ * Adds Model instances to the Store by instantiating them based on a JavaScript object. When adding already-
+ * instantiated Models, use {@link #insert} instead. The instances will be added at the end of the existing collection.
+ * This method accepts either a single argument array of Model instances or any number of model instance arguments.
+ * Sample usage:
+ *
+<pre><code>
+myStore.add({some: 'data'}, {some: 'other data'});
+</code></pre>
+ *
+ * @param {Object} data The data for each model
+ * @return {Array} The array of newly created model instances
+ */
+ add: function(records) {
+ //accept both a single-argument array of records, or any number of record arguments
+ if (!Ext.isArray(records)) {
+ records = Array.prototype.slice.apply(arguments);
+ }
+
+ var me = this,
+ i = 0,
+ length = records.length,
+ record;
+
+ for (; i < length; i++) {
+ record = me.createModel(records[i]);
+ // reassign the model in the array in case it wasn't created yet
+ records[i] = record;
+ }
+
+ me.insert(me.data.length, records);
+
+ return records;
+ },
+
+ /**
+ * Converts a literal to a model, if it's not a model already
+ * @private
+ * @param record {Ext.data.Model/Object} The record to create
+ * @return {Ext.data.Model}
+ */
+ createModel: function(record) {
+ if (!record.isModel) {
+ record = Ext.ModelManager.create(record, this.model);
+ }
+
+ return record;
+ },
+
+ /**
+ * Calls the specified function for each of the {@link Ext.data.Model Records} in the cache.
+ * @param {Function} fn The function to call. The {@link Ext.data.Model Record} is passed as the first parameter.
+ * Returning <tt>false</tt> aborts and exits the iteration.
+ * @param {Object} scope (optional) The scope (<code>this</code> reference) in which the function is executed.
+ * Defaults to the current {@link Ext.data.Model Record} in the iteration.
+ */
+ each: function(fn, scope) {
+ this.data.each(fn, scope);
+ },
+
+ /**
+ * Removes the given record from the Store, firing the 'remove' event for each instance that is removed, plus a single
+ * 'datachanged' event after removal.
+ * @param {Ext.data.Model/Array} records The Ext.data.Model instance or array of instances to remove
+ */
+ remove: function(records, /* private */ isMove) {
+ if (!Ext.isArray(records)) {
+ records = [records];
+ }
+
+ /*
+ * Pass the isMove parameter if we know we're going to be re-inserting this record
+ */
+ isMove = isMove === true;
+ var me = this,
+ sync = false,
+ i = 0,
+ length = records.length,
+ isPhantom,
+ index,
+ record;
+
+ for (; i < length; i++) {
+ record = records[i];
+ index = me.data.indexOf(record);
+
+ if (me.snapshot) {
+ me.snapshot.remove(record);
+ }
+
+ if (index > -1) {
+ isPhantom = record.phantom === true;
+ if (!isMove && !isPhantom) {
+ // don't push phantom records onto removed
+ me.removed.push(record);
+ }
+
+ record.unjoin(me);
+ me.data.remove(record);
+ sync = sync || !isPhantom;
+
+ me.fireEvent('remove', me, record, index);
+ }
+ }
+
+ me.fireEvent('datachanged', me);
+ if (!isMove && me.autoSync && sync) {
+ me.sync();
+ }
+ },
+
+ /**
+ * Removes the model instance at the given index
+ * @param {Number} index The record index
+ */
+ removeAt: function(index) {
+ var record = this.getAt(index);
+
+ if (record) {
+ this.remove(record);
+ }
+ },
+
+ /**
+ * <p>Loads data into the Store via the configured {@link #proxy}. This uses the Proxy to make an
+ * asynchronous call to whatever storage backend the Proxy uses, automatically adding the retrieved
+ * instances into the Store and calling an optional callback if required. Example usage:</p>
+ *
+<pre><code>
+store.load({
+ scope : this,
+ callback: function(records, operation, success) {
+ //the {@link Ext.data.Operation operation} object contains all of the details of the load operation
+ console.log(records);
+ }
+});
+</code></pre>
+ *
+ * <p>If the callback scope does not need to be set, a function can simply be passed:</p>
+ *
+<pre><code>
+store.load(function(records, operation, success) {
+ console.log('loaded records');
+});
+</code></pre>
+ *
+ * @param {Object/Function} options Optional config object, passed into the Ext.data.Operation object before loading.
+ */
+ load: function(options) {
+ var me = this;
+
+ options = options || {};
+
+ if (Ext.isFunction(options)) {
+ options = {
+ callback: options
+ };
+ }
+
+ Ext.applyIf(options, {
+ groupers: me.groupers.items,
+ page: me.currentPage,
+ start: (me.currentPage - 1) * me.pageSize,
+ limit: me.pageSize,
+ addRecords: false
+ });
+
+ return me.callParent([options]);
+ },
+
+ /**
+ * @private
+ * Called internally when a Proxy has completed a load request
+ */
+ onProxyLoad: function(operation) {
+ var me = this,
+ resultSet = operation.getResultSet(),
+ records = operation.getRecords(),
+ successful = operation.wasSuccessful();
+
+ if (resultSet) {
+ me.totalCount = resultSet.total;
+ }
+
+ if (successful) {
+ me.loadRecords(records, operation);
+ }
+
+ me.loading = false;
+ me.fireEvent('load', me, records, successful);
+
+ //TODO: deprecate this event, it should always have been 'load' instead. 'load' is now documented, 'read' is not.
+ //People are definitely using this so can't deprecate safely until 2.x
+ me.fireEvent('read', me, records, operation.wasSuccessful());
+
+ //this is a callback that would have been passed to the 'read' function and is optional
+ Ext.callback(operation.callback, operation.scope || me, [records, operation, successful]);
+ },
+
+ /**
+ * Create any new records when a write is returned from the server.
+ * @private
+ * @param {Array} records The array of new records
+ * @param {Ext.data.Operation} operation The operation that just completed
+ * @param {Boolean} success True if the operation was successful
+ */
+ onCreateRecords: function(records, operation, success) {
+ if (success) {
+ var i = 0,
+ data = this.data,
+ snapshot = this.snapshot,
+ length = records.length,
+ originalRecords = operation.records,
+ record,
+ original,
+ index;
+
+ /**
+ * Loop over each record returned from the server. Assume they are
+ * returned in order of how they were sent. If we find a matching
+ * record, replace it with the newly created one.
+ */
+ for (; i < length; ++i) {
+ record = records[i];
+ original = originalRecords[i];
+ if (original) {
+ index = data.indexOf(original);
+ if (index > -1) {
+ data.removeAt(index);
+ data.insert(index, record);
+ }
+ if (snapshot) {
+ index = snapshot.indexOf(original);
+ if (index > -1) {
+ snapshot.removeAt(index);
+ snapshot.insert(index, record);
+ }
+ }
+ record.phantom = false;
+ record.join(this);
+ }
+ }
+ }
+ },
+
+ /**
+ * Update any records when a write is returned from the server.
+ * @private
+ * @param {Array} records The array of updated records
+ * @param {Ext.data.Operation} operation The operation that just completed
+ * @param {Boolean} success True if the operation was successful
+ */
+ onUpdateRecords: function(records, operation, success){
+ if (success) {
+ var i = 0,
+ length = records.length,
+ data = this.data,
+ snapshot = this.snapshot,
+ record;
+
+ for (; i < length; ++i) {
+ record = records[i];
+ data.replace(record);
+ if (snapshot) {
+ snapshot.replace(record);
+ }
+ record.join(this);
+ }
+ }
+ },
+
+ /**
+ * Remove any records when a write is returned from the server.
+ * @private
+ * @param {Array} records The array of removed records
+ * @param {Ext.data.Operation} operation The operation that just completed
+ * @param {Boolean} success True if the operation was successful
+ */
+ onDestroyRecords: function(records, operation, success){
+ if (success) {
+ var me = this,
+ i = 0,
+ length = records.length,
+ data = me.data,
+ snapshot = me.snapshot,
+ record;
+
+ for (; i < length; ++i) {
+ record = records[i];
+ record.unjoin(me);
+ data.remove(record);
+ if (snapshot) {
+ snapshot.remove(record);
+ }
+ }
+ me.removed = [];
+ }
+ },
+
+ //inherit docs
+ getNewRecords: function() {
+ return this.data.filterBy(this.filterNew).items;
+ },
+
+ //inherit docs
+ getUpdatedRecords: function() {
+ return this.data.filterBy(this.filterUpdated).items;
+ },
+
+ /**
+ * Filters the loaded set of records by a given set of filters.
+ * @param {Mixed} filters The set of filters to apply to the data. These are stored internally on the store,
+ * but the filtering itself is done on the Store's {@link Ext.util.MixedCollection MixedCollection}. See
+ * MixedCollection's {@link Ext.util.MixedCollection#filter filter} method for filter syntax. Alternatively,
+ * pass in a property string
+ * @param {String} value Optional value to filter by (only if using a property string as the first argument)
+ */
+ filter: function(filters, value) {
+ if (Ext.isString(filters)) {
+ filters = {
+ property: filters,
+ value: value
+ };
+ }
+
+ var me = this,
+ decoded = me.decodeFilters(filters),
+ i = 0,
+ doLocalSort = me.sortOnFilter && !me.remoteSort,
+ length = decoded.length;
+
+ for (; i < length; i++) {
+ me.filters.replace(decoded[i]);
+ }
+
+ if (me.remoteFilter) {
+ //the load function will pick up the new filters and request the filtered data from the proxy
+ me.load();
+ } else {
+ /**
+ * A pristine (unfiltered) collection of the records in this store. This is used to reinstate
+ * records when a filter is removed or changed
+ * @property snapshot
+ * @type Ext.util.MixedCollection
+ */
+ if (me.filters.getCount()) {
+ me.snapshot = me.snapshot || me.data.clone();
+ me.data = me.data.filter(me.filters.items);
+
+ if (doLocalSort) {
+ me.sort();
+ }
+ // fire datachanged event if it hasn't already been fired by doSort
+ if (!doLocalSort || me.sorters.length < 1) {
+ me.fireEvent('datachanged', me);
+ }
+ }
+ }
+ },
+
+ /**
+ * Revert to a view of the Record cache with no filtering applied.
+ * @param {Boolean} suppressEvent If <tt>true</tt> the filter is cleared silently without firing the
+ * {@link #datachanged} event.
+ */
+ clearFilter: function(suppressEvent) {
+ var me = this;
+
+ me.filters.clear();
+
+ if (me.remoteFilter) {
+ me.load();
+ } else if (me.isFiltered()) {
+ me.data = me.snapshot.clone();
+ delete me.snapshot;
+
+ if (suppressEvent !== true) {
+ me.fireEvent('datachanged', me);
+ }
+ }
+ },
+
+ /**
+ * Returns true if this store is currently filtered
+ * @return {Boolean}
+ */
+ isFiltered: function() {
+ var snapshot = this.snapshot;
+ return !! snapshot && snapshot !== this.data;
+ },
+
+ /**
+ * Filter by a function. The specified function will be called for each
+ * Record in this Store. If the function returns <tt>true</tt> the Record is included,
+ * otherwise it is filtered out.
+ * @param {Function} fn The function to be called. It will be passed the following parameters:<ul>
+ * <li><b>record</b> : Ext.data.Model<p class="sub-desc">The {@link Ext.data.Model record}
+ * to test for filtering. Access field values using {@link Ext.data.Model#get}.</p></li>
+ * <li><b>id</b> : Object<p class="sub-desc">The ID of the Record passed.</p></li>
+ * </ul>
+ * @param {Object} scope (optional) The scope (<code>this</code> reference) in which the function is executed. Defaults to this Store.
+ */
+ filterBy: function(fn, scope) {
+ var me = this;
+
+ me.snapshot = me.snapshot || me.data.clone();
+ me.data = me.queryBy(fn, scope || me);
+ me.fireEvent('datachanged', me);
+ },
+
+ /**
+ * Query the cached records in this Store using a filtering function. The specified function
+ * will be called with each record in this Store. If the function returns <tt>true</tt> the record is
+ * included in the results.
+ * @param {Function} fn The function to be called. It will be passed the following parameters:<ul>
+ * <li><b>record</b> : Ext.data.Model<p class="sub-desc">The {@link Ext.data.Model record}
+ * to test for filtering. Access field values using {@link Ext.data.Model#get}.</p></li>
+ * <li><b>id</b> : Object<p class="sub-desc">The ID of the Record passed.</p></li>
+ * </ul>
+ * @param {Object} scope (optional) The scope (<code>this</code> reference) in which the function is executed. Defaults to this Store.
+ * @return {MixedCollection} Returns an Ext.util.MixedCollection of the matched records
+ **/
+ queryBy: function(fn, scope) {
+ var me = this,
+ data = me.snapshot || me.data;
+ return data.filterBy(fn, scope || me);
+ },
+
+ /**
+ * Loads an array of data straight into the Store
+ * @param {Array} data Array of data to load. Any non-model instances will be cast into model instances first
+ * @param {Boolean} append True to add the records to the existing records in the store, false to remove the old ones first
+ */
+ loadData: function(data, append) {
+ var model = this.model,
+ length = data.length,
+ i,
+ record;
+
+ //make sure each data element is an Ext.data.Model instance
+ for (i = 0; i < length; i++) {
+ record = data[i];
+
+ if (! (record instanceof Ext.data.Model)) {
+ data[i] = Ext.ModelManager.create(record, model);
+ }
+ }
+
+ this.loadRecords(data, {addRecords: append});
+ },
+
+ /**
+ * Loads an array of {@Ext.data.Model model} instances into the store, fires the datachanged event. This should only usually
+ * be called internally when loading from the {@link Ext.data.proxy.Proxy Proxy}, when adding records manually use {@link #add} instead
+ * @param {Array} records The array of records to load
+ * @param {Object} options {addRecords: true} to add these records to the existing records, false to remove the Store's existing records first
+ */
+ loadRecords: function(records, options) {
+ var me = this,
+ i = 0,
+ length = records.length;
+
+ options = options || {};
+
+
+ if (!options.addRecords) {
+ delete me.snapshot;
+ me.data.clear();
+ }
+
+ me.data.addAll(records);
+
+ //FIXME: this is not a good solution. Ed Spencer is totally responsible for this and should be forced to fix it immediately.
+ for (; i < length; i++) {
+ if (options.start !== undefined) {
+ records[i].index = options.start + i;
+
+ }
+ records[i].join(me);
+ }
+
+ /*
+ * this rather inelegant suspension and resumption of events is required because both the filter and sort functions
+ * fire an additional datachanged event, which is not wanted. Ideally we would do this a different way. The first
+ * datachanged event is fired by the call to this.add, above.
+ */
+ me.suspendEvents();
+
+ if (me.filterOnLoad && !me.remoteFilter) {
+ me.filter();
+ }
+
+ if (me.sortOnLoad && !me.remoteSort) {
+ me.sort();
+ }
+
+ me.resumeEvents();
+ me.fireEvent('datachanged', me, records);
+ },
+
+ // PAGING METHODS
+ /**
+ * Loads a given 'page' of data by setting the start and limit values appropriately. Internally this just causes a normal
+ * load operation, passing in calculated 'start' and 'limit' params
+ * @param {Number} page The number of the page to load
+ */
+ loadPage: function(page) {
+ var me = this;
+
+ me.currentPage = page;
+
+ me.read({
+ page: page,
+ start: (page - 1) * me.pageSize,
+ limit: me.pageSize,
+ addRecords: !me.clearOnPageLoad
+ });
+ },
+
+ /**
+ * Loads the next 'page' in the current data set
+ */
+ nextPage: function() {
+ this.loadPage(this.currentPage + 1);
+ },
+
+ /**
+ * Loads the previous 'page' in the current data set
+ */
+ previousPage: function() {
+ this.loadPage(this.currentPage - 1);
+ },
+
+ // private
+ clearData: function() {
+ this.data.each(function(record) {
+ record.unjoin();
+ });
+
+ this.data.clear();
+ },
+
+ // Buffering
+ /**
+ * Prefetches data the Store using its configured {@link #proxy}.
+ * @param {Object} options Optional config object, passed into the Ext.data.Operation object before loading.
+ * See {@link #load}
+ */
+ prefetch: function(options) {
+ var me = this,
+ operation,
+ requestId = me.getRequestId();
+
+ options = options || {};
+
+ Ext.applyIf(options, {
+ action : 'read',
+ filters: me.filters.items,
+ sorters: me.sorters.items,
+ requestId: requestId
+ });
+ me.pendingRequests.push(requestId);
+
+ operation = Ext.create('Ext.data.Operation', options);
+
+ // HACK to implement loadMask support.
+ //if (operation.blocking) {
+ // me.fireEvent('beforeload', me, operation);
+ //}
+ if (me.fireEvent('beforeprefetch', me, operation) !== false) {
+ me.loading = true;
+ me.proxy.read(operation, me.onProxyPrefetch, me);
+ }
+
+ return me;
+ },
+
+ /**
+ * Prefetches a page of data.
+ * @param {Number} page The page to prefetch
+ * @param {Object} options Optional config object, passed into the Ext.data.Operation object before loading.
+ * See {@link #load}
+ * @param
+ */
+ prefetchPage: function(page, options) {
+ var me = this,
+ pageSize = me.pageSize,
+ start = (page - 1) * me.pageSize,
+ end = start + pageSize;
+
+ // Currently not requesting this page and range isn't already satisified
+ if (Ext.Array.indexOf(me.pagesRequested, page) === -1 && !me.rangeSatisfied(start, end)) {
+ options = options || {};
+ me.pagesRequested.push(page);
+ Ext.applyIf(options, {
+ page : page,
+ start: start,
+ limit: pageSize,
+ callback: me.onWaitForGuarantee,
+ scope: me
+ });
+
+ me.prefetch(options);
+ }
+
+ },
+
+ /**
+ * Returns a unique requestId to track requests.
+ * @private
+ */
+ getRequestId: function() {
+ this.requestSeed = this.requestSeed || 1;
+ return this.requestSeed++;
+ },
+
+ /**
+ * Handles a success pre-fetch
+ * @private
+ * @param {Ext.data.Operation} operation The operation that completed
+ */
+ onProxyPrefetch: function(operation) {
+ var me = this,
+ resultSet = operation.getResultSet(),
+ records = operation.getRecords(),
+
+ successful = operation.wasSuccessful();
+
+ if (resultSet) {
+ me.totalCount = resultSet.total;
+ me.fireEvent('totalcountchange', me.totalCount);
+ }
+
+ if (successful) {
+ me.cacheRecords(records, operation);
+ }
+ Ext.Array.remove(me.pendingRequests, operation.requestId);
+ if (operation.page) {
+ Ext.Array.remove(me.pagesRequested, operation.page);
+ }
+
+ me.loading = false;
+ me.fireEvent('prefetch', me, records, successful, operation);
+
+ // HACK to support loadMask
+ if (operation.blocking) {
+ me.fireEvent('load', me, records, successful);
+ }
+
+ //this is a callback that would have been passed to the 'read' function and is optional
+ Ext.callback(operation.callback, operation.scope || me, [records, operation, successful]);
+ },
+
+ /**
+ * Caches the records in the prefetch and stripes them with their server-side
+ * index.
+ * @private
+ * @param {Array} records The records to cache
+ * @param {Ext.data.Operation} The associated operation
+ */
+ cacheRecords: function(records, operation) {
+ var me = this,
+ i = 0,
+ length = records.length,
+ start = operation ? operation.start : 0;
+
+ if (!Ext.isDefined(me.totalCount)) {
+ me.totalCount = records.length;
+ me.fireEvent('totalcountchange', me.totalCount);
+ }
+
+ for (; i < length; i++) {
+ // this is the true index, not the viewIndex
+ records[i].index = start + i;
+ }
+
+ me.prefetchData.addAll(records);
+ if (me.purgePageCount) {
+ me.purgeRecords();
+ }
+
+ },
+
+
+ /**
+ * Purge the least recently used records in the prefetch if the purgeCount
+ * has been exceeded.
+ */
+ purgeRecords: function() {
+ var me = this,
+ prefetchCount = me.prefetchData.getCount(),
+ purgeCount = me.purgePageCount * me.pageSize,
+ numRecordsToPurge = prefetchCount - purgeCount - 1,
+ i = 0;
+
+ for (; i <= numRecordsToPurge; i++) {
+ me.prefetchData.removeAt(0);
+ }
+ },
+
+ /**
+ * Determines if the range has already been satisfied in the prefetchData.
+ * @private
+ * @param {Number} start The start index
+ * @param {Number} end The end index in the range
+ */
+ rangeSatisfied: function(start, end) {
+ var me = this,
+ i = start,
+ satisfied = true;
+
+ for (; i < end; i++) {
+ if (!me.prefetchData.getByKey(i)) {
+ satisfied = false;
+ //<debug>
+ if (end - i > me.pageSize) {
+ Ext.Error.raise("A single page prefetch could never satisfy this request.");
+ }
+ //</debug>
+ break;
+ }
+ }
+ return satisfied;
+ },
+
+ /**
+ * Determines the page from a record index
+ * @param {Number} index The record index
+ * @return {Number} The page the record belongs to
+ */
+ getPageFromRecordIndex: function(index) {
+ return Math.floor(index / this.pageSize) + 1;
+ },
+
+ /**
+ * Handles a guaranteed range being loaded
+ * @private
+ */
+ onGuaranteedRange: function() {
+ var me = this,
+ totalCount = me.getTotalCount(),
+ start = me.requestStart,
+ end = ((totalCount - 1) < me.requestEnd) ? totalCount - 1 : me.requestEnd,
+ range = [],
+ record,
+ i = start;
+
+ //<debug>
+ if (start > end) {
+ Ext.Error.raise("Start (" + start + ") was greater than end (" + end + ")");
+ }
+ //</debug>
+
+ if (start !== me.guaranteedStart && end !== me.guaranteedEnd) {
+ me.guaranteedStart = start;
+ me.guaranteedEnd = end;
+
+ for (; i <= end; i++) {
+ record = me.prefetchData.getByKey(i);
+ //<debug>
+ if (!record) {
+ Ext.Error.raise("Record was not found and store said it was guaranteed");
+ }
+ //</debug>
+ range.push(record);
+ }
+ me.fireEvent('guaranteedrange', range, start, end);
+ if (me.cb) {
+ me.cb.call(me.scope || me, range);
+ }
+ }
+
+ me.unmask();
+ },
+
+ // hack to support loadmask
+ mask: function() {
+ this.masked = true;
+ this.fireEvent('beforeload');
+ },
+
+ // hack to support loadmask
+ unmask: function() {
+ if (this.masked) {
+ this.fireEvent('load');
+ }
+ },
+
+ /**
+ * Returns the number of pending requests out.
+ */
+ hasPendingRequests: function() {
+ return this.pendingRequests.length;
+ },
+
+
+ // wait until all requests finish, until guaranteeing the range.
+ onWaitForGuarantee: function() {
+ if (!this.hasPendingRequests()) {
+ this.onGuaranteedRange();
+ }
+ },
+
+ /**
+ * Guarantee a specific range, this will load the store with a range (that
+ * must be the pageSize or smaller) and take care of any loading that may
+ * be necessary.
+ */
+ guaranteeRange: function(start, end, cb, scope) {
+ //<debug>
+ if (start && end) {
+ if (end - start > this.pageSize) {
+ Ext.Error.raise({
+ start: start,
+ end: end,
+ pageSize: this.pageSize,
+ msg: "Requested a bigger range than the specified pageSize"
+ });
+ }
+ }
+ //</debug>
+
+ end = (end > this.totalCount) ? this.totalCount - 1 : end;
+
+ var me = this,
+ i = start,
+ prefetchData = me.prefetchData,
+ range = [],
+ startLoaded = !!prefetchData.getByKey(start),
+ endLoaded = !!prefetchData.getByKey(end),
+ startPage = me.getPageFromRecordIndex(start),
+ endPage = me.getPageFromRecordIndex(end);
+
+ me.cb = cb;
+ me.scope = scope;
+
+ me.requestStart = start;
+ me.requestEnd = end;
+ // neither beginning or end are loaded
+ if (!startLoaded || !endLoaded) {
+ // same page, lets load it
+ if (startPage === endPage) {
+ me.mask();
+ me.prefetchPage(startPage, {
+ //blocking: true,
+ callback: me.onWaitForGuarantee,
+ scope: me
+ });
+ // need to load two pages
+ } else {
+ me.mask();
+ me.prefetchPage(startPage, {
+ //blocking: true,
+ callback: me.onWaitForGuarantee,
+ scope: me
+ });
+ me.prefetchPage(endPage, {
+ //blocking: true,
+ callback: me.onWaitForGuarantee,
+ scope: me
+ });
+ }
+ // Request was already satisfied via the prefetch
+ } else {
+ me.onGuaranteedRange();
+ }
+ },
+
+ // because prefetchData is stored by index
+ // this invalidates all of the prefetchedData
+ sort: function() {
+ var me = this,
+ prefetchData = me.prefetchData,
+ sorters,
+ start,
+ end,
+ range;
+
+ if (me.buffered) {
+ if (me.remoteSort) {
+ prefetchData.clear();
+ me.callParent(arguments);
+ } else {
+ sorters = me.getSorters();
+ start = me.guaranteedStart;
+ end = me.guaranteedEnd;
+ range;
+
+ if (sorters.length) {
+ prefetchData.sort(sorters);
+ range = prefetchData.getRange();
+ prefetchData.clear();
+ me.cacheRecords(range);
+ delete me.guaranteedStart;
+ delete me.guaranteedEnd;
+ me.guaranteeRange(start, end);
+ }
+ me.callParent(arguments);
+ }
+ } else {
+ me.callParent(arguments);
+ }
+ },
+
+ // overriden to provide striping of the indexes as sorting occurs.
+ // this cannot be done inside of sort because datachanged has already
+ // fired and will trigger a repaint of the bound view.
+ doSort: function(sorterFn) {
+ var me = this;
+ if (me.remoteSort) {
+ //the load function will pick up the new sorters and request the sorted data from the proxy
+ me.load();
+ } else {
+ me.data.sortBy(sorterFn);
+ if (!me.buffered) {
+ var range = me.getRange(),
+ ln = range.length,
+ i = 0;
+ for (; i < ln; i++) {
+ range[i].index = i;
+ }
+ }
+ me.fireEvent('datachanged', me);
+ }
+ },
+
+ /**
+ * Finds the index of the first matching Record in this store by a specific field value.
+ * @param {String} fieldName The name of the Record field to test.
+ * @param {String/RegExp} value Either a string that the field value
+ * should begin with, or a RegExp to test against the field.
+ * @param {Number} startIndex (optional) The index to start searching at
+ * @param {Boolean} anyMatch (optional) True to match any part of the string, not just the beginning
+ * @param {Boolean} caseSensitive (optional) True for case sensitive comparison
+ * @param {Boolean} exactMatch True to force exact match (^ and $ characters added to the regex). Defaults to false.
+ * @return {Number} The matched index or -1
+ */
+ find: function(property, value, start, anyMatch, caseSensitive, exactMatch) {
+ var fn = this.createFilterFn(property, value, anyMatch, caseSensitive, exactMatch);
+ return fn ? this.data.findIndexBy(fn, null, start) : -1;
+ },
+
+ /**
+ * Finds the first matching Record in this store by a specific field value.
+ * @param {String} fieldName The name of the Record field to test.
+ * @param {String/RegExp} value Either a string that the field value
+ * should begin with, or a RegExp to test against the field.
+ * @param {Number} startIndex (optional) The index to start searching at
+ * @param {Boolean} anyMatch (optional) True to match any part of the string, not just the beginning
+ * @param {Boolean} caseSensitive (optional) True for case sensitive comparison
+ * @param {Boolean} exactMatch True to force exact match (^ and $ characters added to the regex). Defaults to false.
+ * @return {Ext.data.Model} The matched record or null
+ */
+ findRecord: function() {
+ var me = this,
+ index = me.find.apply(me, arguments);
+ return index !== -1 ? me.getAt(index) : null;
+ },
+
+ /**
+ * @private
+ * Returns a filter function used to test a the given property's value. Defers most of the work to
+ * Ext.util.MixedCollection's createValueMatcher function
+ * @param {String} property The property to create the filter function for
+ * @param {String/RegExp} value The string/regex to compare the property value to
+ * @param {Boolean} anyMatch True if we don't care if the filter value is not the full value (defaults to false)
+ * @param {Boolean} caseSensitive True to create a case-sensitive regex (defaults to false)
+ * @param {Boolean} exactMatch True to force exact match (^ and $ characters added to the regex). Defaults to false.
+ * Ignored if anyMatch is true.
+ */
+ createFilterFn: function(property, value, anyMatch, caseSensitive, exactMatch) {
+ if (Ext.isEmpty(value)) {
+ return false;
+ }
+ value = this.data.createValueMatcher(value, anyMatch, caseSensitive, exactMatch);
+ return function(r) {
+ return value.test(r.data[property]);
+ };
+ },
+
+ /**
+ * Finds the index of the first matching Record in this store by a specific field value.
+ * @param {String} fieldName The name of the Record field to test.
+ * @param {Mixed} value The value to match the field against.
+ * @param {Number} startIndex (optional) The index to start searching at
+ * @return {Number} The matched index or -1
+ */
+ findExact: function(property, value, start) {
+ return this.data.findIndexBy(function(rec) {
+ return rec.get(property) === value;
+ },
+ this, start);
+ },
+
+ /**
+ * Find the index of the first matching Record in this Store by a function.
+ * If the function returns <tt>true</tt> it is considered a match.
+ * @param {Function} fn The function to be called. It will be passed the following parameters:<ul>
+ * <li><b>record</b> : Ext.data.Model<p class="sub-desc">The {@link Ext.data.Model record}
+ * to test for filtering. Access field values using {@link Ext.data.Model#get}.</p></li>
+ * <li><b>id</b> : Object<p class="sub-desc">The ID of the Record passed.</p></li>
+ * </ul>
+ * @param {Object} scope (optional) The scope (<code>this</code> reference) in which the function is executed. Defaults to this Store.
+ * @param {Number} startIndex (optional) The index to start searching at
+ * @return {Number} The matched index or -1
+ */
+ findBy: function(fn, scope, start) {
+ return this.data.findIndexBy(fn, scope, start);
+ },
+
+ /**
+ * Collects unique values for a particular dataIndex from this store.
+ * @param {String} dataIndex The property to collect
+ * @param {Boolean} allowNull (optional) Pass true to allow null, undefined or empty string values
+ * @param {Boolean} bypassFilter (optional) Pass true to collect from all records, even ones which are filtered
+ * @return {Array} An array of the unique values
+ **/
+ collect: function(dataIndex, allowNull, bypassFilter) {
+ var me = this,
+ data = (bypassFilter === true && me.snapshot) ? me.snapshot: me.data;
+
+ return data.collect(dataIndex, 'data', allowNull);
+ },
+
+ /**
+ * Gets the number of cached records.
+ * <p>If using paging, this may not be the total size of the dataset. If the data object
+ * used by the Reader contains the dataset size, then the {@link #getTotalCount} function returns
+ * the dataset size. <b>Note</b>: see the Important note in {@link #load}.</p>
+ * @return {Number} The number of Records in the Store's cache.
+ */
+ getCount: function() {
+ return this.data.length || 0;
+ },
+
+ /**
+ * Returns the total number of {@link Ext.data.Model Model} instances that the {@link Ext.data.proxy.Proxy Proxy}
+ * indicates exist. This will usually differ from {@link #getCount} when using paging - getCount returns the
+ * number of records loaded into the Store at the moment, getTotalCount returns the number of records that
+ * could be loaded into the Store if the Store contained all data
+ * @return {Number} The total number of Model instances available via the Proxy
+ */
+ getTotalCount: function() {
+ return this.totalCount;
+ },
+
+ /**
+ * Get the Record at the specified index.
+ * @param {Number} index The index of the Record to find.
+ * @return {Ext.data.Model} The Record at the passed index. Returns undefined if not found.
+ */
+ getAt: function(index) {
+ return this.data.getAt(index);
+ },
+
+ /**
+ * Returns a range of Records between specified indices.
+ * @param {Number} startIndex (optional) The starting index (defaults to 0)
+ * @param {Number} endIndex (optional) The ending index (defaults to the last Record in the Store)
+ * @return {Ext.data.Model[]} An array of Records
+ */
+ getRange: function(start, end) {
+ return this.data.getRange(start, end);
+ },
+
+ /**
+ * Get the Record with the specified id.
+ * @param {String} id The id of the Record to find.
+ * @return {Ext.data.Model} The Record with the passed id. Returns undefined if not found.
+ */
+ getById: function(id) {
+ return (this.snapshot || this.data).findBy(function(record) {
+ return record.getId() === id;
+ });
+ },
+
+ /**
+ * Get the index within the cache of the passed Record.
+ * @param {Ext.data.Model} record The Ext.data.Model object to find.
+ * @return {Number} The index of the passed Record. Returns -1 if not found.
+ */
+ indexOf: function(record) {
+ return this.data.indexOf(record);
+ },
+
+
+ /**
+ * Get the index within the entire dataset. From 0 to the totalCount.
+ * @param {Ext.data.Model} record The Ext.data.Model object to find.
+ * @return {Number} The index of the passed Record. Returns -1 if not found.
+ */
+ indexOfTotal: function(record) {
+ return record.index || this.indexOf(record);
+ },
+
+ /**
+ * Get the index within the cache of the Record with the passed id.
+ * @param {String} id The id of the Record to find.
+ * @return {Number} The index of the Record. Returns -1 if not found.
+ */
+ indexOfId: function(id) {
+ return this.data.indexOfKey(id);
+ },
+
+ /**
+ * Remove all items from the store.
+ * @param {Boolean} silent Prevent the `clear` event from being fired.
+ */
+ removeAll: function(silent) {
+ var me = this;
+
+ me.clearData();
+ if (me.snapshot) {
+ me.snapshot.clear();
+ }
+ if (silent !== true) {
+ me.fireEvent('clear', me);
+ }
+ },
+
+ /*
+ * Aggregation methods
+ */
+
+ /**
+ * Convenience function for getting the first model instance in the store
+ * @param {Boolean} grouped (Optional) True to perform the operation for each group
+ * in the store. The value returned will be an object literal with the key being the group
+ * name and the first record being the value. The grouped parameter is only honored if
+ * the store has a groupField.
+ * @return {Ext.data.Model/undefined} The first model instance in the store, or undefined
+ */
+ first: function(grouped) {
+ var me = this;
+
+ if (grouped && me.isGrouped()) {
+ return me.aggregate(function(records) {
+ return records.length ? records[0] : undefined;
+ }, me, true);
+ } else {
+ return me.data.first();
+ }
+ },
+
+ /**
+ * Convenience function for getting the last model instance in the store
+ * @param {Boolean} grouped (Optional) True to perform the operation for each group
+ * in the store. The value returned will be an object literal with the key being the group
+ * name and the last record being the value. The grouped parameter is only honored if
+ * the store has a groupField.
+ * @return {Ext.data.Model/undefined} The last model instance in the store, or undefined
+ */
+ last: function(grouped) {
+ var me = this;
+
+ if (grouped && me.isGrouped()) {
+ return me.aggregate(function(records) {
+ var len = records.length;
+ return len ? records[len - 1] : undefined;
+ }, me, true);
+ } else {
+ return me.data.last();
+ }
+ },
+
+ /**
+ * Sums the value of <tt>property</tt> for each {@link Ext.data.Model record} between <tt>start</tt>
+ * and <tt>end</tt> and returns the result.
+ * @param {String} field A field in each record
+ * @param {Boolean} grouped (Optional) True to perform the operation for each group
+ * in the store. The value returned will be an object literal with the key being the group
+ * name and the sum for that group being the value. The grouped parameter is only honored if
+ * the store has a groupField.
+ * @return {Number} The sum
+ */
+ sum: function(field, grouped) {
+ var me = this;
+
+ if (grouped && me.isGrouped()) {
+ return me.aggregate(me.getSum, me, true, [field]);
+ } else {
+ return me.getSum(me.data.items, field);
+ }
+ },
+
+ // @private, see sum
+ getSum: function(records, field) {
+ var total = 0,
+ i = 0,
+ len = records.length;
+
+ for (; i < len; ++i) {
+ total += records[i].get(field);
+ }
+
+ return total;
+ },
+
+ /**
+ * Gets the count of items in the store.
+ * @param {Boolean} grouped (Optional) True to perform the operation for each group
+ * in the store. The value returned will be an object literal with the key being the group
+ * name and the count for each group being the value. The grouped parameter is only honored if
+ * the store has a groupField.
+ * @return {Number} the count
+ */
+ count: function(grouped) {
+ var me = this;
+
+ if (grouped && me.isGrouped()) {
+ return me.aggregate(function(records) {
+ return records.length;
+ }, me, true);
+ } else {
+ return me.getCount();
+ }
+ },
+
+ /**
+ * Gets the minimum value in the store.
+ * @param {String} field The field in each record
+ * @param {Boolean} grouped (Optional) True to perform the operation for each group
+ * in the store. The value returned will be an object literal with the key being the group
+ * name and the minimum in the group being the value. The grouped parameter is only honored if
+ * the store has a groupField.
+ * @return {Mixed/undefined} The minimum value, if no items exist, undefined.
+ */
+ min: function(field, grouped) {
+ var me = this;
+
+ if (grouped && me.isGrouped()) {
+ return me.aggregate(me.getMin, me, true, [field]);
+ } else {
+ return me.getMin(me.data.items, field);
+ }
+ },
+
+ // @private, see min
+ getMin: function(records, field){
+ var i = 1,
+ len = records.length,
+ value, min;
+
+ if (len > 0) {
+ min = records[0].get(field);
+ }
+
+ for (; i < len; ++i) {
+ value = records[i].get(field);
+ if (value < min) {
+ min = value;
+ }
+ }
+ return min;
+ },
+
+ /**
+ * Gets the maximum value in the store.
+ * @param {String} field The field in each record
+ * @param {Boolean} grouped (Optional) True to perform the operation for each group
+ * in the store. The value returned will be an object literal with the key being the group
+ * name and the maximum in the group being the value. The grouped parameter is only honored if
+ * the store has a groupField.
+ * @return {Mixed/undefined} The maximum value, if no items exist, undefined.
+ */
+ max: function(field, grouped) {
+ var me = this;
+
+ if (grouped && me.isGrouped()) {
+ return me.aggregate(me.getMax, me, true, [field]);
+ } else {
+ return me.getMax(me.data.items, field);
+ }
+ },
+
+ // @private, see max
+ getMax: function(records, field) {
+ var i = 1,
+ len = records.length,
+ value,
+ max;
+
+ if (len > 0) {
+ max = records[0].get(field);
+ }
+
+ for (; i < len; ++i) {
+ value = records[i].get(field);
+ if (value > max) {
+ max = value;
+ }
+ }
+ return max;
+ },
+
+ /**
+ * Gets the average value in the store.
+ * @param {String} field The field in each record
+ * @param {Boolean} grouped (Optional) True to perform the operation for each group
+ * in the store. The value returned will be an object literal with the key being the group
+ * name and the group average being the value. The grouped parameter is only honored if
+ * the store has a groupField.
+ * @return {Mixed/undefined} The average value, if no items exist, 0.
+ */
+ average: function(field, grouped) {
+ var me = this;
+ if (grouped && me.isGrouped()) {
+ return me.aggregate(me.getAverage, me, true, [field]);
+ } else {
+ return me.getAverage(me.data.items, field);
+ }
+ },
+
+ // @private, see average
+ getAverage: function(records, field) {
+ var i = 0,
+ len = records.length,
+ sum = 0;
+
+ if (records.length > 0) {
+ for (; i < len; ++i) {
+ sum += records[i].get(field);
+ }
+ return sum / len;
+ }
+ return 0;
+ },
+
+ /**
+ * Runs the aggregate function for all the records in the store.
+ * @param {Function} fn The function to execute. The function is called with a single parameter,
+ * an array of records for that group.
+ * @param {Object} scope (optional) The scope to execute the function in. Defaults to the store.
+ * @param {Boolean} grouped (Optional) True to perform the operation for each group
+ * in the store. The value returned will be an object literal with the key being the group
+ * name and the group average being the value. The grouped parameter is only honored if
+ * the store has a groupField.
+ * @param {Array} args (optional) Any arguments to append to the function call
+ * @return {Object} An object literal with the group names and their appropriate values.
+ */
+ aggregate: function(fn, scope, grouped, args) {
+ args = args || [];
+ if (grouped && this.isGrouped()) {
+ var groups = this.getGroups(),
+ i = 0,
+ len = groups.length,
+ out = {},
+ group;
+
+ for (; i < len; ++i) {
+ group = groups[i];
+ out[group.name] = fn.apply(scope || this, [group.children].concat(args));
+ }
+ return out;
+ } else {
+ return fn.apply(scope || this, [this.data.items].concat(args));
+ }
+ }
+});
+