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tables.js
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const utils = require('./utils/utils').utils;
const fs = require('fs');
const rimraf = require('rimraf');
const ora = require('ora');
const spinner = ora('Processing');
const CONSTANTS = utils.CONSTANTS;
const REQUEST_CODES = CONSTANTS.REQUEST_CODES;
const VALIDATE = utils.CONSTANTS.VALIDATE;
const validate = utils.validate;
const _ = require('underscore');
const configFileName = 'jsonDB-config.json';
const flagValues = ['beginsWith', 'endsWith', 'contains'];
function createTable(options, callback) {
spinner.start();
let errorList = [];
let tableName = options.tableName;
let database = options.database;
if (! tableName) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'tableName')
};
errorList.push(e);
} else {
if (tableName.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'tableName')
};
errorList.push(e);
} else if (tableName.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'tableName')
};
errorList.push(e);
}
if (! validate.isValidString(tableName)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'tableName')
};
errorList.push(e);
}
}
if (! database) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'database')
};
errorList.push(e);
} else {
if (database.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'database')
};
errorList.push(e);
} else if (database.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'database')
};
errorList.push(e);
}
if (! validate.isValidString(database)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'database')
};
errorList.push(e);
}
}
if (errorList.length) {
callback({
status: REQUEST_CODES.FAIL,
error: errorList
});
return;
} else {
let basePath = utils.getRootPath() + utils.getFileSeparator() + database;
fs.exists(basePath, function(exists) {
if (exists) {
let filePath = basePath + utils.getFileSeparator() + tableName + '.json';
fs.exists(filePath, function(exists) {
if (exists) {
callback({
status: REQUEST_CODES.FAIL,
error: 'table exists with the given name'
});
return;
} else {
fs.writeFile(filePath, '{}', function(err) {
if(err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'Error while creating file',
error: err
});
return;
} else {
let configFilePath = basePath + utils.getFileSeparator() + configFileName;
let configFileObj;
try {
configFileObj = JSON.parse(fs.readFileSync(configFilePath, 'utf8'));
let currentDBConfigs = _.findWhere(configFileObj['databases'], {name: database});
currentDBConfigs['tables'].push(tableName);
fs.writeFile(configFilePath, JSON.stringify(configFileObj), function(err) {
spinner.stop();
if(err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'Error while updating config file',
error: err
});
return;
} else {
callback({
status: REQUEST_CODES.SUCCESS,
msg: 'table created successfully with table name ' + tableName
});
return;
}
});
} catch (e) {
spinner.color = 'yellow';
spinner.text = 'Waiting...';
setTimeout(function() {
createTable(options, function(resp) {
callback(resp);
})
}, 1000);
return;
}
}
});
}
});
} else {
callback({
status: REQUEST_CODES.FAIL,
error: 'No database exists with the given name'
});
return;
}
});
}
}
function dropTable(options, callback) {
let errorList = [];
let tableName = options.tableName;
let database = options.database;
if (! tableName) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'tableName')
};
errorList.push(e);
} else {
if (tableName.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'tableName')
};
errorList.push(e);
} else if (tableName.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'tableName')
};
errorList.push(e);
}
if (! validate.isValidString(tableName)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'tableName')
};
errorList.push(e);
}
}
if (! database) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'database')
};
errorList.push(e);
} else {
if (database.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'database')
};
errorList.push(e);
} else if (database.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'database')
};
errorList.push(e);
}
if (! validate.isValidString(database)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'database')
};
errorList.push(e);
}
}
if (errorList.length) {
callback({
status: REQUEST_CODES.FAIL,
error: errorList
});
return;
} else {
let basePath = utils.getRootPath() + utils.getFileSeparator() + database;
fs.exists(basePath, function(exists) {
if (exists) {
let filePath = basePath + utils.getFileSeparator() + tableName;
fs.exists(filePath, function(err) { //check file exists or not
if(err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'No table exists with the given name - ' + tableName,
error: err
});
return;
} else {
let tablePath = basePath + utils.getFileSeparator() + tableName + '.json';
fs.unlink(tablePath, function (err) {
if (err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'error while droping table - ' + tableName,
error: err
});
return;
} else {
let configFilePath = basePath + utils.getFileSeparator() + configFileName;
let configFileObj;
try {
configFileObj = JSON.parse(fs.readFileSync(configFilePath, 'utf8'));
let currentDBConfigs = _.findWhere(configFileObj['databases'], {name: database});
const index = currentDBConfigs['tables'].indexOf(tableName);
if (index > -1) {
currentDBConfigs['tables'].splice(index, 1);
fs.writeFile(configFilePath, JSON.stringify(configFileObj), function(err) {
spinner.stop();
if(err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'Error while updating config file',
error: err
});
return;
} else {
callback({
status: REQUEST_CODES.SUCCESS,
msg: 'table dropped successfully with table name ' + tableName
});
return;
}
});
}
} catch (e) {
spinner.color = 'yellow';
spinner.text = 'Waiting...';
setTimeout(function() {
dropTable(options, function(resp) {
callback(resp);
})
}, 1000);
return;
}
}
});
}
});
} else {
callback({
status: REQUEST_CODES.FAIL,
error: 'No database exists with the given name'
});
return;
}
});
}
}
function insertRecord(options, callback) {
spinner.start();
let errorList = [];
let recordObj = options.record;
let tableName = options.tableName;
let database = options.database;
if (! tableName) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'tableName')
};
errorList.push(e);
} else {
if (tableName.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'tableName')
};
errorList.push(e);
} else if (tableName.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'tableName')
};
errorList.push(e);
}
if (! validate.isValidString(tableName)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'tableName')
};
errorList.push(e);
}
}
if (! database) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'database')
};
errorList.push(e);
} else {
if (database.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'database')
};
errorList.push(e);
} else if (database.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'database')
};
errorList.push(e);
}
if (! validate.isValidString(database)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'database')
};
errorList.push(e);
}
}
if (! recordObj || undefined == recordObj || !Object.keys(recordObj).length) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'record')
};
errorList.push(e);
}
if (errorList.length) {
callback({
status: REQUEST_CODES.FAIL,
error: errorList
});
return;
} else {
let basePath = utils.getRootPath() + utils.getFileSeparator() + database;
fs.exists(basePath, function(exists) {
if (exists) {
let filePath = basePath + utils.getFileSeparator() + tableName;
fs.exists(filePath, function(err) { //check file exists or not
if(err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'No table exists with the given name - ' + tableName,
error: err
});
return;
} else {
let tablePath = basePath + utils.getFileSeparator() + tableName + '.json';
let tableObj;
try {
tableObj = JSON.parse(fs.readFileSync(tablePath, 'utf8'));
let docId = utils.generateDocIdByTable(tableObj) + '';
recordObj['_ObjId'] = docId;
tableObj[docId] = recordObj;
fs.writeFile(tablePath, JSON.stringify(tableObj), function(err) {
spinner.stop();
if(err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'Error while insert record into table',
error: err
});
return;
} else {
callback({
status: REQUEST_CODES.SUCCESS,
msg: 'record inserted successfully with the documentId ' + docId
});
return;
}
});
} catch (e) {
spinner.color = 'yellow';
spinner.text = 'Waiting for file operation';
setTimeout(function() {
insertRecord(options, function(resp) {
callback(resp);
})
}, 1000);
return;
}
}
});
} else {
callback({
status: REQUEST_CODES.FAIL,
error: 'No database exists with the given name'
});
return;
}
});
}
}
function batchInsert(options, callback) {
spinner.start();
let errorList = [];
let recordObjs = options.records;
let tableName = options.tableName;
let database = options.database;
if (! tableName) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'tableName')
};
errorList.push(e);
} else {
if (tableName.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'tableName')
};
errorList.push(e);
} else if (tableName.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'tableName')
};
errorList.push(e);
}
if (! validate.isValidString(tableName)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'tableName')
};
errorList.push(e);
}
}
if (! database) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'database')
};
errorList.push(e);
} else {
if (database.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'database')
};
errorList.push(e);
} else if (database.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'database')
};
errorList.push(e);
}
if (! validate.isValidString(database)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'database')
};
errorList.push(e);
}
}
if (! recordObjs || undefined == recordObjs || !recordObjs.length) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'records')
};
errorList.push(e);
}
if (errorList.length) {
callback({
status: REQUEST_CODES.FAIL,
error: errorList
});
return;
} else {
let basePath = utils.getRootPath() + utils.getFileSeparator() + database;
fs.exists(basePath, function(exists) {
if (exists) {
let filePath = basePath + utils.getFileSeparator() + tableName;
fs.exists(filePath, function(err) { //check file exists or not
if(err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'No table exists with the given name - ' + tableName,
error: err
});
return;
} else {
let tablePath = basePath + utils.getFileSeparator() + tableName + '.json';
let tableObj;
try {
let lastIndex = recordObjs.length;
let insertCount = 0;
recordObjs.forEach(function(recordObj) {
setTimeout(function() {
options['record'] = recordObj;
insertRecord(options, function(response) {
insertCount = insertCount + 1;
lastIndex = lastIndex - 1;
if (lastIndex <= 0) {
spinner.stop();
callback({
status: REQUEST_CODES.SUCCESS,
msg: 'successfully inserted ' + insertCount + ' records'
});
return;
}
});
}, 25);
});
} catch (e) {
spinner.color = 'yellow';
spinner.text = 'Waiting for file operation';
setTimeout(function() {
batchInsert(options, function(resp) {
callback(resp);
})
}, 1000);
return;
}
}
});
} else {
callback({
status: REQUEST_CODES.FAIL,
error: 'No database exists with the given name'
});
return;
}
});
}
}
function getRecordById(options, callback) {
spinner.start();
let errorList = [];
let recordId = options.recordId;
let tableName = options.tableName;
let database = options.database;
if (! tableName) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'tableName')
};
errorList.push(e);
} else {
if (tableName.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'tableName')
};
errorList.push(e);
} else if (tableName.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'tableName')
};
errorList.push(e);
}
if (! validate.isValidString(tableName)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'tableName')
};
errorList.push(e);
}
}
if (! database) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'database')
};
errorList.push(e);
} else {
if (database.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'database')
};
errorList.push(e);
} else if (database.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'database')
};
errorList.push(e);
}
if (! validate.isValidString(database)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'database')
};
errorList.push(e);
}
}
if (! recordId) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'record')
};
errorList.push(e);
}
if (errorList.length) {
callback({
status: REQUEST_CODES.FAIL,
error: errorList
});
return;
} else {
let basePath = utils.getRootPath() + utils.getFileSeparator() + database;
fs.exists(basePath, function(exists) {
if (exists) {
let filePath = basePath + utils.getFileSeparator() + tableName;
fs.exists(filePath, function(err) { //check file exists or not
if(err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'No table exists with the given name - ' + tableName,
error: err
});
return;
} else {
let tablePath = basePath + utils.getFileSeparator() + tableName + '.json';
let tableObj;
try {
tableObj = JSON.parse(fs.readFileSync(tablePath, 'utf8'));
let record = tableObj[recordId];
spinner.stop();
callback({
status: REQUEST_CODES.SUCCESS,
result: record
});
return;
} catch (e) {
spinner.color = 'yellow';
spinner.text = 'Waiting...';
setTimeout(function() {
getRecordById(options, function(resp) {
callback(resp);
})
}, 1000);
return;
}
}
});
} else {
callback({
status: REQUEST_CODES.FAIL,
error: 'No database exists with the given name'
});
return;
}
});
}
}
function getRecordByKeyValue(options, callback) {
spinner.start();
let errorList = [];
let key = options.key;
let value = options['value'];
let tableName = options.tableName;
let database = options.database;
if (! tableName) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'tableName')
};
errorList.push(e);
} else {
if (tableName.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'tableName')
};
errorList.push(e);
} else if (tableName.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'tableName')
};
errorList.push(e);
}
if (! validate.isValidString(tableName)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'tableName')
};
errorList.push(e);
}
}
if (! database) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'database')
};
errorList.push(e);
} else {
if (database.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'database')
};
errorList.push(e);
} else if (database.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'database')
};
errorList.push(e);
}
if (! validate.isValidString(database)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'database')
};
errorList.push(e);
}
}
if (! key) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'key')
};
errorList.push(e);
}
if (! value) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'value')
};
errorList.push(e);
}
if (errorList.length) {
callback({
status: REQUEST_CODES.FAIL,
error: errorList
});
return;
} else {
let basePath = utils.getRootPath() + utils.getFileSeparator() + database;
fs.exists(basePath, function(exists) {
if (exists) {
let filePath = basePath + utils.getFileSeparator() + tableName;
fs.exists(filePath, function(err) { //check file exists or not
if(err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'No table exists with the given name - ' + tableName,
error: err
});
return;
} else {
let tablePath = basePath + utils.getFileSeparator() + tableName + '.json';
let tableObj;
try {
tableObj = JSON.parse(fs.readFileSync(tablePath, 'utf8'));
let filter = {};
filter[key] = value;
let arrayObj = Object.values(tableObj);
let records = _.where(arrayObj, filter);
spinner.stop();
callback({
status: REQUEST_CODES.SUCCESS,
result: records
});
return;
} catch (e) {
spinner.color = 'yellow';
spinner.text = 'Waiting...';
setTimeout(function() {
getRecordByKeyValue(options, function(resp) {
callback(resp);
})
}, 1000);
return;
}
}
});
} else {
callback({
status: REQUEST_CODES.FAIL,
error: 'No database exists with the given name'
});
return;
}
});
}
}
function getRecordsBySearch(options, callback) {
spinner.start();
let errorList = [];
let key = options.key;
let value = options['value'] +'';
let flag = options.flag;
let tableName = options.tableName;
let database = options.database;
if (! tableName) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'tableName')
};
errorList.push(e);
} else {
if (tableName.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'tableName')
};
errorList.push(e);
} else if (tableName.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'tableName')
};
errorList.push(e);
}
if (! validate.isValidString(tableName)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'tableName')
};
errorList.push(e);
}
}
if (! database) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'database')
};
errorList.push(e);
} else {
if (database.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'database')
};
errorList.push(e);
} else if (database.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'database')
};
errorList.push(e);
}
if (! validate.isValidString(database)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'database')
};
errorList.push(e);
}
}
if (! key) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'key')
};
errorList.push(e);
}
if (! value) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'value')
};
errorList.push(e);
}
if (! flag) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'flag')
};
errorList.push(e);
} else {
if (!_.some(flagValues, function(value) { return value == flag;})) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FLAG_VALUE_INVALID, 'flag')
};
errorList.push(e);
}
}
if (errorList.length) {
callback({
status: REQUEST_CODES.FAIL,
error: errorList
});
return;
} else {
let basePath = utils.getRootPath() + utils.getFileSeparator() + database;
fs.exists(basePath, function(exists) {
if (exists) {
let filePath = basePath + utils.getFileSeparator() + tableName;
fs.exists(filePath, function(err) { //check file exists or not
if(err) {
callback({
status: REQUEST_CODES.FAIL,
msg: 'No table exists with the given name - ' + tableName,
error: err
});
return;
} else {
let tablePath = basePath + utils.getFileSeparator() + tableName + '.json';
let tableObj;
try {
tableObj = JSON.parse(fs.readFileSync(tablePath, 'utf8'));
let arrayObj = Object.values(tableObj);
let records;
switch(value) {
case 'beginsWith':
records = _.filter(arrayObj, function(d){ return d[key].startsWith(value); });
break;
case 'endsWith':
records = _.filter(arrayObj, function(d){ return d[key].endsWith(value); });
break;
default:
records = _.filter(arrayObj, function(d){return d[key].includes(value); });
}
spinner.stop();
callback({
status: REQUEST_CODES.SUCCESS,
result: records
});
return;
} catch (e) {
console.log('e ;;', e);
spinner.color = 'yellow';
spinner.text = 'Waiting...';
setTimeout(function() {
getRecordsBySearch(options, function(resp) {
callback(resp);