refactored database loading and querying to background script
This commit is contained in:
Sriram Hariharan
109
js/background.js
109
js/background.js
@@ -1,6 +1,8 @@
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updateBadge(true);
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var grades;
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loadDataBase()
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/* Handle messages and their commands from content and popup scripts*/
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chrome.runtime.onMessage.addListener(function(request, sender, response) {
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chrome.runtime.onMessage.addListener(function (request, sender, response) {
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switch (request.command) {
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case "courseStorage":
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if (request.action == "add") {
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@@ -31,6 +33,8 @@ chrome.runtime.onMessage.addListener(function(request, sender, response) {
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case "updateCourseList":
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updateTabs();
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break;
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case "gradesQuery":
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executeQuery(request.query, response);
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default:
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const xhr = new XMLHttpRequest();
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const method = request.method ? request.method.toUpperCase() : "GET";
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@@ -51,35 +55,35 @@ chrome.runtime.onMessage.addListener(function(request, sender, response) {
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});
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/* Initially set the course data in storage */
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chrome.runtime.onInstalled.addListener(function(details) {
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chrome.runtime.onInstalled.addListener(function (details) {
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if (details.reason == "install") {
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chrome.storage.sync.get('savedCourses', function(data) {
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chrome.storage.sync.get('savedCourses', function (data) {
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if (!data.savedCourses) {
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var arr = new Array();
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chrome.storage.sync.set({
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savedCourses: arr
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}, function() {
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}, function () {
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console.log('initial course list');
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});
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chrome.storage.sync.set({
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courseConflictHighlight: true
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}, function() {
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}, function () {
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console.log('initial highlighting: true');
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});
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chrome.storage.sync.set({
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loadAll: true
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}, function() {
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}, function () {
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console.log('initial loadAll: true');
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});
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}
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});
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} else if (details.reason == "update") {
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console.log("updated");
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chrome.storage.sync.get('loadAll', function(data) {
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chrome.storage.sync.get('loadAll', function (data) {
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if (data.loadAll == undefined) {
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chrome.storage.sync.set({
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loadAll: true
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}, function() {
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}, function () {
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console.log('initial loadAll: true');
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});
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}
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@@ -88,8 +92,39 @@ chrome.runtime.onInstalled.addListener(function(details) {
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});
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function executeQuery(query, sendResponse) {
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console.log(grades)
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var res = grades.exec(query)[0];
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sendResponse({
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data: res,
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});
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}
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/* Load the database*/
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function loadDataBase() {
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sql = window.SQL;
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loadBinaryFile('grades.db', function (data) {
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var sqldb = new SQL.Database(data);
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grades = sqldb;
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});
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}
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/* load the database from file */
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function loadBinaryFile(path, success) {
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var xhr = new XMLHttpRequest();
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xhr.open("GET", chrome.extension.getURL(path), true);
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xhr.responseType = "arraybuffer";
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xhr.onload = function () {
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var data = new Uint8Array(xhr.response);
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var arr = new Array();
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for (var i = 0; i != data.length; ++i) arr[i] = String.fromCharCode(data[i]);
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success(arr.join(""));
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};
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xhr.send();
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};
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function updateBadge(first) {
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chrome.storage.sync.get('savedCourses', function(data) {
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chrome.storage.sync.get('savedCourses', function (data) {
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if (data.savedCourses) {
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let text = "";
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if (data.savedCourses.length > 0) {
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@@ -105,7 +140,7 @@ function updateBadge(first) {
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});
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timeout = 200;
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}
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setTimeout(function() {
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setTimeout(function () {
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chrome.browserAction.setBadgeBackgroundColor({
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color: '#bf5700'
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});
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@@ -117,7 +152,7 @@ function updateBadge(first) {
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/* Find all the conflicts in the courses and send them out/ if there is even a conflict*/
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function checkConflicts(sendResponse) {
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chrome.storage.sync.get('savedCourses', function(data) {
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chrome.storage.sync.get('savedCourses', function (data) {
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var conflicts = [];
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var courses = data.savedCourses;
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for (var i = 0; i < courses.length; i++) {
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@@ -144,7 +179,7 @@ function checkConflicts(sendResponse) {
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/* Find if the course at unique and with currdatearr is contained in the saved courses and if it conflicts with any other courses*/
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function isSingleConflict(currdatearr, unique, sendResponse) {
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chrome.storage.sync.get('savedCourses', function(data) {
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chrome.storage.sync.get('savedCourses', function (data) {
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var courses = data.savedCourses;
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var conflict = false;
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for (var i = 0; i < courses.length; i++) {
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@@ -188,7 +223,7 @@ function isConflict(adtarr, bdtarr) {
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/* Add the requested course to the storage*/
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function add(request, sender, sendResponse) {
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chrome.storage.sync.get('savedCourses', function(data) {
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chrome.storage.sync.get('savedCourses', function (data) {
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var courses = data.savedCourses;
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if (!contains(courses, request.course.unique)) {
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courses.push(request.course)
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@@ -206,7 +241,7 @@ function add(request, sender, sendResponse) {
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}
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/* Find and Remove the requested course from the storage*/
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function remove(request, sender, sendResponse) {
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chrome.storage.sync.get('savedCourses', function(data) {
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chrome.storage.sync.get('savedCourses', function (data) {
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var courses = data.savedCourses;
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console.log(courses);
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var index = 0;
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@@ -227,7 +262,7 @@ function remove(request, sender, sendResponse) {
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/* Find if the unique is already contained within the storage*/
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function alreadyContains(unique, sendResponse) {
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chrome.storage.sync.get('savedCourses', function(data) {
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chrome.storage.sync.get('savedCourses', function (data) {
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var courses = data.savedCourses;
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sendResponse({
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alreadyContains: contains(courses, unique)
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@@ -247,7 +282,7 @@ function contains(courses, unique) {
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}
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function updateTabs() {
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chrome.tabs.query({}, function(tabs) {
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chrome.tabs.query({}, function (tabs) {
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for (var i = 0; i < tabs.length; i++) {
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chrome.tabs.sendMessage(tabs[i].id, {
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command: "updateCourseList"
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@@ -260,7 +295,7 @@ const UPDATE_INTERVAL = 1000 * 60 * 16;
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setInterval(updateStatus, UPDATE_INTERVAL);
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// updateStatus();
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function updateStatus(sendResponse) {
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chrome.storage.sync.get('savedCourses', function(data) {
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chrome.storage.sync.get('savedCourses', function (data) {
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var courses = data.savedCourses;
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var nochange = true;
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for (let i = 0; i < courses.length; i++) {
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@@ -268,25 +303,29 @@ function updateStatus(sendResponse) {
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let c = courses[i];
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let oldstatus = c.status;
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let oldlink = c.link;
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$.ajax({url: oldlink, success: function(result){
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if(result){
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console.log(result);
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var object = $('<div/>').html(result).contents();
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let newstatus = object.find('[data-th="Status"]').text();
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let registerlink = object.find('td[data-th="Add"] a');
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if (registerlink) {
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registerlink = registerlink.attr('href');
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$.ajax({
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url: oldlink,
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success: function (result) {
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if (result) {
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console.log(result);
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var object = $('<div/>').html(result).contents();
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let newstatus = object.find('[data-th="Status"]').text();
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let registerlink = object.find('td[data-th="Add"] a');
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if (registerlink) {
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registerlink = registerlink.attr('href');
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}
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var haschanged = (newstatus == oldstatus && registerlink == oldlink);
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if (!haschanged) {
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console.log(c.unique + ' updated from ' + oldstatus + " to " + newstatus + " and " + oldlink + " to " + registerlink);
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}
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nochange &= haschanged;
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c.registerlink = registerlink;
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c.status = newstatus;
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}
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var haschanged = (newstatus == oldstatus && registerlink == oldlink);
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if (!haschanged) {
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console.log(c.unique + ' updated from ' + oldstatus + " to " + newstatus + " and " + oldlink + " to " + registerlink);
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}
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nochange &= haschanged;
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c.registerlink = registerlink;
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c.status = newstatus;
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}}});
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}
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});
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} catch (e) {
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console.log(e);
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console.log('Not logged into UT Coursebook. Could not update class statuses.');
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