GZ/nwyj/WebContent/admin/scripts/dojo/dojox/data/PicasaStore.js

if (!dojo._hasResource["dojox.data.PicasaStore"]) { // _hasResource checks added
													// by build. Do not use
													// _hasResource directly in
													// your code.
	dojo._hasResource["dojox.data.PicasaStore"] = true;
	dojo.provide("dojox.data.PicasaStore");

	dojo.require("dojo.data.util.simpleFetch");
	dojo.require("dojo.io.script");
	dojo.require("dojo.date.stamp");

	dojo.declare("dojox.data.PicasaStore", null, {
		constructor : function(/* Object */args) {
			// summary:
			// Initializer for the PicasaStore store.
			// description:
			// The PicasaStore is a Datastore interface to one of the basic
			// services
			// of the Picasa service, the public photo feed. This does not
			// provide
			// access to all the services of Picasa.
			// This store cannot do * and ? filtering as the picasa service
			// provides no interface for wildcards.
			if (args && args.label) {
				this.label = args.label;
			}
		},

		_picasaUrl : "http://picasaweb.google.com/data/feed/api/all",

		_storeRef : "_S",

		label : "title",

		_assertIsItem : function(/* item */item) {
			// summary:
			// This function tests whether the item passed in is indeed an item
			// in the store.
			// item:
			// The item to test for being contained by the store.
			if (!this.isItem(item)) {
				throw new Error("dojox.data.PicasaStore: a function was passed an item argument that was not an item");
			}
		},

		_assertIsAttribute : function(/* attribute-name-string */attribute) {
			// summary:
			// This function tests whether the item passed in is indeed a valid
			// 'attribute' like type for the store.
			// attribute:
			// The attribute to test for being contained by the store.
			if (typeof attribute !== "string") {
				throw new Error("dojox.data.PicasaStore: a function was passed an attribute argument that was not an attribute name string");
			}
		},

		getFeatures : function() {
			// summary:
			// See dojo.data.api.Read.getFeatures()
			return {
				'dojo.data.api.Read' : true
			};
		},

		getValue : function(item, attribute) {
			// summary:
			// See dojo.data.api.Read.getValue()
			var values = this.getValues(item, attribute);
			if (values) {
				return values[0];
			}
			return undefined;
		},

		getAttributes : function(item) {
			// summary:
			// See dojo.data.api.Read.getAttributes()
			return ["id", "published", "updated", "category", "title$type",
					"title", "summary$type", "summary", "rights$type",
					"rights", "link", "author", "gphoto$id", "gphoto$name",
					"location"];
		},

		hasAttribute : function(item, attribute) {
			// summary:
			// See dojo.data.api.Read.hasAttributes()
			if (this.getValue(item, attribute)) {
				return true;
			}
			return false;
		},

		isItemLoaded : function(item) {
			// summary:
			// See dojo.data.api.Read.isItemLoaded()
			return this.isItem(item);
		},

		loadItem : function(keywordArgs) {
			// summary:
			// See dojo.data.api.Read.loadItem()
		},

		getLabel : function(item) {
			// summary:
			// See dojo.data.api.Read.getLabel()
			return this.getValue(item, this.label);
		},

		getLabelAttributes : function(item) {
			// summary:
			// See dojo.data.api.Read.getLabelAttributes()
			return [this.label];
		},

		containsValue : function(item, attribute, value) {
			// summary:
			// See dojo.data.api.Read.containsValue()
			var values = this.getValues(item, attribute);
			for (var i = 0; i < values.length; i++) {
				if (values[i] === value) {
					return true;
				}
			}
			return false;
		},

		getValues : function(item, attribute) {
			// summary:
			// See dojo.data.api.Read.getValue()

			this._assertIsItem(item);
			this._assertIsAttribute(attribute);
			if (attribute === "title") {
				return [this._unescapeHtml(item.title)];
			} else if (attribute === "author") {
				return [this._unescapeHtml(item.author[0].name)];
			} else if (attribute === "datePublished") {
				return [dojo.date.stamp.fromISOString(item.published)];
			} else if (attribute === "dateTaken") {
				return [dojo.date.stamp.fromISOString(item.date_taken)];
			} else if (attribute === "imageUrlSmall") {
				return [item.media.thumbnail[1].url];
			} else if (attribute === "imageUrl") {
				return [item.content$src];
			} else if (attribute === "imageUrlMedium") {
				return [item.media.thumbnail[2].url];
			} else if (attribute === "link") {
				return [item.link[1]];
			} else if (attribute === "tags") {
				return item.tags.split(" ");
			} else if (attribute === "description") {
				return [this._unescapeHtml(item.summary)];
			}
			return undefined;
		},

		isItem : function(item) {
			// summary:
			// See dojo.data.api.Read.isItem()
			if (item && item[this._storeRef] === this) {
				return true;
			}
			return false;
		},

		close : function(request) {
			// summary:
			// See dojo.data.api.Read.close()
		},

		_fetchItems : function(request, fetchHandler, errorHandler) {
			// summary:
			// Fetch picasa items that match to a query
			// request:
			// A request object
			// fetchHandler:
			// A function to call for fetched items
			// errorHandler:
			// A function to call on error

			if (!request.query) {
				request.query = {};
			}

			// Build up the content to send the request for.
			var content = {
				alt : "jsonm",
				pp : "1",
				psc : "G"
			};
			content['start-index'] = "1";
			if (request.query.start) {
				content['start-index'] = request.query.start;
			}
			if (request.query.tags) {
				content.q = request.query.tags;
			}
			if (request.query.userid) {
				content.uname = request.query.userid;
			}
			if (request.query.userids) {
				content.ids = request.query.userids;
			}
			if (request.query.lang) {
				content.hl = request.query.lang;
			}
			if (request.count) {
				content['max-results'] = request.count;
			} else {
				content['max-results'] = "20";
			}

			// Linking this up to Picasa is a JOY!
			var self = this;
			var handle = null;
			var myHandler = function(data) {
				if (handle !== null) {
					dojo.disconnect(handle);
				}

				// Process the items...
				fetchHandler(self._processPicasaData(data), request);
			};
			var getArgs = {
				url : this._picasaUrl,
				// preventCache: true,
				content : content,
				callbackParamName : 'callback',
				handle : myHandler
			};
			var deferred = dojo.io.script.get(getArgs);

			deferred.addErrback(function(error) {
						dojo.disconnect(handle);
						errorHandler(error, request);
					});
		},

		_processPicasaData : function(data) {
			var items = [];
			if (data.feed) {
				items = data.feed.entry;
				// Add on the store ref so that isItem can work.
				for (var i = 0; i < items.length; i++) {
					var item = items[i];
					item[this._storeRef] = this;
				}
			}
			return items;
		},

		_unescapeHtml : function(str) {
			// summary: Utility function to un-escape XML special characters in
			// an HTML string.
			// description: Utility function to un-escape XML special characters
			// in an HTML string.
			// str: String.
			// The string to un-escape
			// returns: HTML String converted back to the normal text
			// (unescaped) characters (<,>,&, ", etc,).
			//
			// TODO: Check to see if theres already compatible escape() in
			// dojo.string or dojo.html
			str = str.replace(/&amp;/gm, "&").replace(/&lt;/gm, "<").replace(
					/&gt;/gm, ">").replace(/&quot;/gm, "\"");
			str = str.replace(/&#39;/gm, "'");
			return str;
		}
	});
	dojo.extend(dojox.data.PicasaStore, dojo.data.util.simpleFetch);

}