michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: "use strict";
michael@0: 
michael@0: var FeedHandler = {
michael@0:   PREF_CONTENTHANDLERS_BRANCH: "browser.contentHandlers.types.",
michael@0:   TYPE_MAYBE_FEED: "application/vnd.mozilla.maybe.feed",
michael@0: 
michael@0:   _contentTypes: null,
michael@0: 
michael@0:   getContentHandlers: function fh_getContentHandlers(contentType) {
michael@0:     if (!this._contentTypes)
michael@0:       this.loadContentHandlers();
michael@0: 
michael@0:     if (!(contentType in this._contentTypes))
michael@0:       return [];
michael@0: 
michael@0:     return this._contentTypes[contentType];
michael@0:   },
michael@0:   
michael@0:   loadContentHandlers: function fh_loadContentHandlers() {
michael@0:     this._contentTypes = {};
michael@0: 
michael@0:     let kids = Services.prefs.getBranch(this.PREF_CONTENTHANDLERS_BRANCH).getChildList("");
michael@0: 
michael@0:     // First get the numbers of the providers by getting all ###.uri prefs
michael@0:     let nums = [];
michael@0:     for (let i = 0; i < kids.length; i++) {
michael@0:       let match = /^(\d+)\.uri$/.exec(kids[i]);
michael@0:       if (!match)
michael@0:         continue;
michael@0:       else
michael@0:         nums.push(match[1]);
michael@0:     }
michael@0: 
michael@0:     // Sort them, to get them back in order
michael@0:     nums.sort(function(a, b) { return a - b; });
michael@0: 
michael@0:     // Now register them
michael@0:     for (let i = 0; i < nums.length; i++) {
michael@0:       let branch = Services.prefs.getBranch(this.PREF_CONTENTHANDLERS_BRANCH + nums[i] + ".");
michael@0:       let vals = branch.getChildList("");
michael@0:       if (vals.length == 0)
michael@0:         return;
michael@0: 
michael@0:       try {
michael@0:         let type = branch.getCharPref("type");
michael@0:         let uri = branch.getComplexValue("uri", Ci.nsIPrefLocalizedString).data;
michael@0:         let title = branch.getComplexValue("title", Ci.nsIPrefLocalizedString).data;
michael@0: 
michael@0:         if (!(type in this._contentTypes))
michael@0:           this._contentTypes[type] = [];
michael@0:         this._contentTypes[type].push({ contentType: type, uri: uri, name: title });
michael@0:       }
michael@0:       catch(ex) {}
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   observe: function fh_observe(aSubject, aTopic, aData) {
michael@0:     if (aTopic === "Feeds:Subscribe") {
michael@0:       let args = JSON.parse(aData);
michael@0:       let tab = BrowserApp.getTabForId(args.tabId);
michael@0:       if (!tab)
michael@0:         return;
michael@0: 
michael@0:       let browser = tab.browser;
michael@0:       let feeds = browser.feeds;
michael@0:       if (feeds == null)
michael@0:         return;
michael@0: 
michael@0:       // First, let's decide on which feed to subscribe
michael@0:       let feedIndex = -1;
michael@0:       if (feeds.length > 1) {
michael@0:         let p = new Prompt({
michael@0:           window: browser.contentWindow,
michael@0:           title: Strings.browser.GetStringFromName("feedHandler.chooseFeed")
michael@0:         }).setSingleChoiceItems(feeds.map(function(feed) {
michael@0:           return { label: feed.title || feed.href }
michael@0:         })).show((function(data) {
michael@0:           feedIndex = data.button;
michael@0:           if (feedIndex == -1)
michael@0:             return;
michael@0: 
michael@0:           this.loadFeed(feeds[feedIndex], browser);
michael@0:         }).bind(this));
michael@0:         return;
michael@0:       }
michael@0: 
michael@0:       this.loadFeed(feeds[0], browser);
michael@0:     }
michael@0:   },
michael@0: 
michael@0:   loadFeed: function fh_loadFeed(aFeed, aBrowser) {
michael@0:     let feedURL = aFeed.href;
michael@0: 
michael@0:     // Next, we decide on which service to send the feed
michael@0:     let handlers = this.getContentHandlers(this.TYPE_MAYBE_FEED);
michael@0:     if (handlers.length == 0)
michael@0:       return;
michael@0: 
michael@0:     // JSON for Prompt
michael@0:     let p = new Prompt({
michael@0:       window: aBrowser.contentWindow,
michael@0:       title: Strings.browser.GetStringFromName("feedHandler.subscribeWith")
michael@0:     }).setSingleChoiceItems(handlers.map(function(handler) {
michael@0:       return { label: handler.name };
michael@0:     })).show(function(data) {
michael@0:       if (data.button == -1)
michael@0:         return;
michael@0: 
michael@0:       // Merge the handler URL and the feed URL
michael@0:       let readerURL = handlers[data.button].uri;
michael@0:       readerURL = readerURL.replace(/%s/gi, encodeURIComponent(feedURL));
michael@0: 
michael@0:       // Open the resultant URL in a new tab
michael@0:       BrowserApp.addTab(readerURL, { parentId: BrowserApp.selectedTab.id });
michael@0:     });
michael@0:   }
michael@0: };