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ng-websql.js
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ng-websql.js
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(function(angular, window, document) {
'use strict';
/**
* @ngdoc provider
* @name db
* @description
* Creates/opens a database and generates factories for all the tables required for the app.
*/
function DbProvider(dbConfig) {
var db; // The database object
var resources = {}; // A map of the created resources (table definitions with methods attached to them)
return {
$get: ['$q', '$log', 'dbTypes', 'dbLocations', function($q, $log, dbTypes, dbLocations) {
$log.debug("opening/creating database ", dbConfig.name, 'ver.', dbConfig.version);
var dbPromise = $q.defer();
if (window.cordova && window.sqlitePlugin) {
document.addEventListener('deviceready', function() {
db = sqlitePlugin.openDatabase({
name: dbConfig.name,
location: dbConfig.location || dbLocations.LIBRARY,
androidDatabaseImplementation: 2
}, dbPromise.resolve, dbPromise.reject);
}, false);
} else {
try {
db = window.openDatabase(dbConfig.name, dbConfig.version, dbConfig.description, dbConfig.size);
dbPromise.resolve(db);
} catch (e) {
dbPromise.reject(e);
}
}
/**
* Parses a SQLite result and returns the result rows as an array of records
* @param {object} result The SQL result returned by executing the query
* @return {array} The array of records returned by the query
*/
var fetchAll = function(result) {
var output = [];
for (var i = 0; i < result.rows.length; i++) {
output.push(result.rows.item(i));
}
return output;
};
/**
* Parses a SQLite results and returns the first row
* @param {object} result The SQL result
* @return {object} The first record returned by the query
*/
var fetch = function(result) {
return result.rows.item(0);
};
/**
* Creates a table and a resource Factory definition with the defined methods
* @param {object} props Resource factory methods and table definition
* @return {promise} A promise that will be fulfilled on table creation and will contain a factory definition
*/
var resource = function(props) {
var deferred = $q.defer();
var columns = [];
if (resources[props.name]) {
return $q.reject(Error('Resource already exists'));
} else {
resources[props.name] = deferred.promise;
}
columns = props.columns.map(function(column) {
var colQuery = column.name + ' ' + column.type;
if (column.primaryKey) {
colQuery += ' PRIMARY KEY';
}
if (column.autoincrement) {
colQuery += ' AUTOINCREMENT';
}
if (!column.null) {
colQuery += ' NOT NULL';
}
if (column.default !== undefined) {
colQuery += ' DEFAULT ';
if (angular.isString(column.default)) {
colQuery += '\'' + column.default+'\'';
} else {
colQuery += column.default;
}
}
if (column.check !== undefined) {
colQuery += ' CHECK ' + column.name + ' (' + column.check + ')';
}
return colQuery;
});
var query = 'CREATE TABLE IF NOT EXISTS ' + props.name + ' (' + columns.join(',');
if (props.foreignKeys) {
for (var key in props.foreignKeys) {
var foreign = Object.keys(props.foreignKeys[key])[0];
query += ', FOREIGN KEY(' + key + ') REFERENCES ' + foreign + '(' + props.foreignKeys[key][foreign] + ')';
}
}
query += ')';
dbPromise.promise.then(angular.bind(this, function() {
this.query(query).then(angular.bind(this, function() {
if (props.triggers) {
var triggers = [],
triggerAction,
triggerName,
triggerBefore,
triggerQuery,
trigger;
for (var action in props.triggers) {
triggerAction = action.toUpperCase();
triggerName = props.triggers[action].name || (props.name + '-' + action);
triggerBefore = props.triggers[action].before || false;
triggerQuery = props.trigger[action].query;
trigger = 'CREATE TRIGGER IF NOT EXISTS ' + triggerName + ' ' + (triggerBefore ? 'BEFORE' : 'AFTER') +
' ' + triggerAction + ' ON ' + props.name + 'BEGIN ' + triggerQuery + ' END;';
triggers.push(this.query(trigger));
}
return $q.all(triggers);
}
return $q.resolve();
})).catch(function(error) {
deferred.reject(error);
}).finally(function() {
var resourceDefinition = angular.extend({}, props);
delete resourceDefinition.name;
delete resourceDefinition.columns;
delete resourceDefinition.foreignKeys;
resources[props.name] = resourceDefinition;
angular.extend(deferred.promise, resourceDefinition);
$log.debug('Table \'' + props.name + '\' created/loaded');
props = undefined;
deferred.resolve(resourceDefinition);
});
}));
return deferred.promise;
};
var factoryDefinition = {
types: dbTypes,
query: function(query, bindings) {
bindings = typeof bindings !== 'undefined' ? bindings : [];
var deferred = $q.defer();
dbPromise.promise.then(function() {
db.transaction(function(transaction) {
transaction.executeSql(query, bindings, function(transaction, result) {
deferred.resolve(result);
}, function(transaction, error) {
deferred.reject(error);
});
});
});
return deferred.promise;
},
fetch: fetch,
fetchAll: fetchAll,
resource: resource
};
return factoryDefinition;
}]
};
}
angular.module('angular.websql', [])
/*
.constant('dbConfig', {
name: "sampleDb",
location: dbLocations.DOCUMENTS,
version: '1.0',
description: 'database',
size: -1
})
*/
.constant('dbTypes', {
INTEGER: 'INTEGER',
TEXT: 'TEXT',
BLOB: 'BLOB',
REAL: 'REAL',
NUMERIC: 'NUMERIC'
})
.constant('dbLocations', {
DOCUMENTS: 0, // Documents - visible to iTunes and backed up by iCloud
LIBRARY: 1, // Backed up by iCloud, NOT visible to iTunes
DEVICE_ONLY: 2 // NOT visible to iTunes and NOT backed up by iCloud
})
.provider('db', ['dbConfig', DbProvider]);
}(angular, window, document));