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September 13, 2017 07:22
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| /* | |
| * This is a wrapper for AWS Dynamo DB Document Client. | |
| * License: MIT License | |
| * | |
| * required AWS SDK And jQuery. | |
| * However, it is a good idea to replace Deferred with Promise. | |
| * | |
| * How to use. | |
| * | |
| * 1, Insert HTML tag. | |
| * <script src="https://sdk.amazonaws.com/js/aws-sdk-2.95.0.min.js"></script> | |
| * <script src="dist/dynamodb.js"></script> | |
| * | |
| * 2, Set _accessKeyId and _secretAccessKey as necessary, or set AWS.config.credentials using AWS Cognito Identity. | |
| * | |
| * Example of use. | |
| * var dynamodb = AWSDyDBDC.getInstance(); | |
| * dynamodb.get(__PARAMS__).then(__CODE__).fail(__CODE__).always(__CODE__); | |
| */ | |
| var AWSDyDBDC = (function(){ | |
| var _region = 'ap-northeast-1'; | |
| var _accessKeyId = ''; | |
| var _secretAccessKey = ''; | |
| var _docClient = null; | |
| var _getDocClient = function(){ | |
| if (_docClient === null) { | |
| _docClient = new AWS.DynamoDB.DocumentClient(); | |
| console.log('AWS.DynamoDB.DocumentClient Ready.'); | |
| } | |
| return _docClient; | |
| }; | |
| var _constructor = function(){ | |
| if (typeof AWS !== 'object') { | |
| throw new Error('RequiredObjectDoesNotExist'); | |
| } | |
| AWS.config.region = _region; | |
| if (_accessKeyId && _secretAccessKey) { | |
| AWS.config.update({ | |
| accessKeyId: _accessKeyId, | |
| secretAccessKey: _secretAccessKey | |
| }); | |
| } | |
| }; | |
| _constructor.prototype.getInstance = function(){ | |
| return this; | |
| }; | |
| _constructor.prototype.promiseCallback = function(callback){ | |
| var deferred = $.Deferred(); | |
| if (typeof callback === 'function') { | |
| return callback(deferred); | |
| } | |
| return deferred.reject(); | |
| }; | |
| _constructor.prototype.put = function(params){ | |
| var _params = params || { | |
| TableName: '', | |
| Item: {}, | |
| }; | |
| return this.promiseCallback(function(deferred){ | |
| _getDocClient().put(_params, function(err, data){ | |
| return ((err) ? deferred.reject(err) : deferred.resolve(data)); | |
| }); | |
| return deferred.promise(); | |
| }); | |
| }; | |
| _constructor.prototype.get = function(params){ | |
| var _params = params || { | |
| TableName: '', | |
| Key: {}, | |
| }; | |
| return this.promiseCallback(function(deferred){ | |
| _getDocClient().get(_params, function(err, data){ | |
| return ((err) ? deferred.reject(err) : deferred.resolve(data)); | |
| }); | |
| return deferred.promise(); | |
| }); | |
| }; | |
| _constructor.prototype.update = function(params){ | |
| var _params = params || { | |
| TableName: '', | |
| Key: {}, | |
| ExpressionAttributeNames: {}, | |
| ExpressionAttributeValues: {}, | |
| UpdateExpression: '', | |
| }; | |
| return this.promiseCallback(function(deferred){ | |
| _getDocClient().update(_params, function(err, data){ | |
| return ((err) ? deferred.reject(err) : deferred.resolve(data)); | |
| }); | |
| return deferred.promise(); | |
| }); | |
| }; | |
| _constructor.prototype.delete = function(params){ | |
| var _params = params || { | |
| TableName: '', | |
| Key: {}, | |
| }; | |
| return this.promiseCallback(function(deferred){ | |
| _getDocClient().delete(_params, function(err, data){ | |
| return ((err) ? deferred.reject(err) : deferred.resolve(data)); | |
| }); | |
| return deferred.promise(); | |
| }); | |
| }; | |
| _constructor.prototype.scan = function(tableName, useSort, sortKey){ | |
| var params = { | |
| TableName: tableName || '', | |
| }; | |
| useSort = useSort || false; | |
| sortKey = sortKey || 'id'; | |
| return this.promiseCallback(function(deferred){ | |
| _getDocClient().scan(params, function(err, data){ | |
| if (err) { return deferred.reject(err); } | |
| var items = (useSort) ? data.Items.sort(function(a, b){ | |
| if (a[sortKey] < b[sortKey]) return -1; | |
| if (a[sortKey] > b[sortKey]) return 1; | |
| return 0; | |
| }) : data.Items ; | |
| return deferred.resolve(items); | |
| }); | |
| return deferred.promise(); | |
| }); | |
| }; | |
| return new _constructor(); | |
| })(); |
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