85 lines
2.3 KiB
JavaScript
85 lines
2.3 KiB
JavaScript
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/*
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Description: Database Handler for Web SQL Database(HTML5 Spec)
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Author : xxkuo@Transtep.com
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Usage Sample:
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$.DBHandler.connect("TESTWEBDB", 200000, "THIS IS A WEBDB TEST");
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$.DBHandler.migration(1, function(tx){
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tx.executeSql('CREATE TABLE IF NOT EXISTS tbl_contents (id unique, type, path, timelength)');
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});
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$.DBHandler.migration(2, function(tx){
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tx.executeSql("INSERT INTO tbl_contents (id, type, path, timelength) values(?,?,?,?)", ["1","1","1","1"]);
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});
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$.DBHandler.migration(3, function(tx){
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tx.executeSql("INSERT INTO tbl_contents (id, type, path, timelength) values(?,?,?,?)", ["2","2","2","2"]);
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});
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$.DBHandler.migration(4, function(tx){
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tx.executeSql("INSERT INTO tbl_contents (id, type, path, timelength) values(?,?,?,?)", ["3","3","3","3"]);
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});
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$.DBHandler.doMigration();
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$.DBHandler.transaction(function (tx) {
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tx.executeSql("SELECT * FROM tbl_contents", [], function(tx, result){
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for (var i = 0, item = null; i < result.rows.length; i++) {
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item = result.rows.item(i);
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console.log();
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alert(item["id"] + " " + item["type"]);
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}
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}, function(tx, message){
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alert(message);
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});
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});
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*/
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$.extend({
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DBHandler: {
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migrations : [],
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database : false,
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connect : function(dbname, size, desc){
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try {
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if (window.openDatabase) {
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this.database = openDatabase(dbname, "", desc, size);
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if (!this.database)
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alert("無法開始本地資料庫，可能沒有空間。");
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} else
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alert("此瀏灠器沒有支援Web Storage Database");
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} catch(err) { }
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},
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transaction: function(func){
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this.database.transaction(func);
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},
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migration: function(version, func){
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this.migrations[version] = func;
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},
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doMigrationItem: function(version){
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if($.DBHandler.migrations[version]){
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$.DBHandler.database.changeVersion(this.database.version, String(version), function(t){
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$.DBHandler.migrations[version](t);
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}, function(err){
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if(console.error) console.error("Error!: %o", err);
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}, function(){
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$.DBHandler.doMigration(version+1);
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});
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}
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},
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doMigration: function(){
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var initialVersion = parseInt(this.database.version) || 0;
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try {
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this.doMigrationItem(initialVersion+1);
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} catch(e) {
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if(console.error) console.error(e);
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}
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}
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}
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})();
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