js object

gistfile1.txt

//Module to communicate between background and app scripts
var Messenger = (function() {
    
    var m = {};
    
    var responses = {};
    
    m.current = chrome.runtime.id;
    m.extension = "hkgihfhfbmabgamjpbgkkdjcmicmheap";
    m.app = "neoalcniaoimlmhmibbccponldlhnnee";
    m.other = (m.current==m.app)?m.extension:m.app;
    
    //Post a message for other apps/extensions to hear
    var sendExternal = function(id, action) {
        chrome.runtime.sendMessage(id, {"action": action});
    };
    
    //Generates a random string of letters and numbers of the specified length to keep track of alarms
    var makeID = function(length) {
        var text = "";
        var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

        for( var i=0; i < length; i++ )
            text += possible.charAt(Math.floor(Math.random() * possible.length));

        return text;
    };
    
    //Post a message for scripts to hear
    m.sendAction = function(action) {
        chrome.runtime.sendMessage({"action": action});
        sendExternal(m.other, action);
    };
    
    //Post a message for scripts to hear after a delay
    m.sendActionDelay = function(action, delay) {
        
        //Get an id for the alarm
        var id = makeID(20);
        chrome.alarms.create(id, {"delayInMinutes": delay});
        
        //When an alarm goes off and its id matches the current one, send the action and remove this listener
        chrome.alarms.onAlarm.addListener(function handler(alarm) {
            if (alarm.name == id) {
                m.sendAction(action);
                chrome.alarms.onAlarm.removeListener(handler);
            }
        });
    }
    
    //Save a setting to the storage
    m.saveSettings = function(settings, callback) {
        if (m.current == m.app) {
            chrome.storage.sync.set(settings, callback);
        } else {
            chrome.runtime.sendMessage(m.app, {"action": "set_storage", "settings": settings}, callback);
        }
    };
    
    //Share storage between extension/app
    m.getStorage = function(keys, response) {
        
        //If this is the app, get the storage
        if (m.current == m.app) {
            chrome.storage.sync.get(keys, response);
            
        //If this is the extension, ask the app to get the storage
        } else {
            chrome.runtime.sendMessage(m.app, {"action": "get_storage", "keys": keys}, response);
        }
    };
    
    //Let other modules register themselves to be notified when an event comes in
    m.addListener = function(action, response) {
        
        //If there's nothing listening for that action, make a list for it
        if (!responses[action]) {
            responses[action] = [response];
        } else {
            
            //Add it to the existing list if it isn't already there
            for (var i=0; i<responses[action].length; i++) {
                if (responses[action][i] == response) return;
            }
            responses[action].push(response);
        }
    };
    
    m.removeListener = function(action, response) {
        //Find and remove the response from the list
        if (responses[action]) {
            for (var i=0; i<responses[action].length; i++) {
                if (responses[action][i] == response) {
                    responses[action].splice(i, 1);
                    return;
                }
            }
        }
    };
    
    //Create a notification and play a sound
    m.notify = function(text) {
        
        //Only the app has notification permissions, so only the app can use this
        if (m.current == m.app) {
            chrome.notifications.create("",
                                        {
                                            "type": "basic",
                                            "iconUrl": "/icons/icon-128.png",
                                            "title": "SpurStart",
                                            "message": text
                                        }, function() {});
            var audio = new Audio("/sounds/notification.mp3");
            audio.play();
        }
    }.bind(this);
    
    //Start listening for incoming messages
    m.init = function() {
        chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
            
            //If there are responses for this action, run them all
            if (request.action && responses[request.action]) {
                for (var i=0; i<responses[request.action].length; i++) {
                    (responses[request.action][i])(request, sender);
                }
            }
        });
        
        //When receiving a message from another component (app or extension)
        chrome.runtime.onMessageExternal.addListener(function(request, sender, sendResponse) {
            
            //If we have been asked for storage by the extension
            if (m.current == m.app) {
                if (request.action && request.action=="get_storage" && request.keys) {
                    
                    //Get storage and return
                    chrome.storage.sync.get(request.keys, function(items) {
                        sendResponse(items);
                    });
                    return true;
                } else if (request.action && request.action=="set_storage" && request.settings) {
                    
                    //Set storage and return
                    chrome.storage.sync.set(request.settings, sendResponse({"storage_response": "done"}));
                    return true;
                }
            }
            
            //If there are responses for this action, run them all
            if (request.action && responses[request.action]) {
                for (var i=0; i<responses[request.action].length; i++) {
                    (responses[request.action][i])(request, sender);
                }
            }
        });
        
        //Log errors for debug purposes
        window.onerror = function(msg, url, linenumber) {
            console.log("Error: " + msg + "\nurl: " + url + "\nLine number: " + linenumber);
        };
    };
    
    return m;
    
}());
Messenger.init();