forked from syamdanda/jsonbase
/
database.js
162 lines (148 loc) · 3.76 KB
/
database.js
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// All functionalities related to database
const utils = require('./utils/utils').utils;
const fs = require('fs');
const rimraf = require('rimraf');
const CONSTANTS = utils.CONSTANTS;
const REQUEST_CODES = CONSTANTS.REQUEST_CODES;
const VALIDATE = utils.CONSTANTS.VALIDATE;
const validate = utils.validate;
function createDatabase(options, callback) {
let errorList = [];
let name = options.name;
let path = options.path;
if (! name) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'name')
};
errorList.push(e);
} else {
if (name.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'name')
};
errorList.push(e);
} else if (name.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'name')
};
errorList.push(e);
}
if (! validate.isValidString(name)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'name')
};
errorList.push(e);
}
}
if (errorList.length) {
callback({
status: REQUEST_CODES.FAIL,
error: errorList
});
return;
} else {
let basePath;
if (! path) {
basePath = utils.getRootPath() + utils.getFileSeparator() + name;
} else {
basePath = path + utils.getFileSeparator() + name;
}
fs.exists(basePath, function(exists) {
if (exists) {
callback({
status: REQUEST_CODES.FAIL,
error: 'folder exists already'
});
return;
} else {
fs.mkdir(basePath,function(e){
if(e ){
callback({
status: REQUEST_CODES.FAIL,
error: e
});
return;
} else {
let configTemplate = utils.getConfigFileTemplate();
let db = {
'name': name,
'path': basePath,
'tables': []
};
configTemplate['databases'].push(db);
let data = JSON.stringify(configTemplate);
fs.writeFileSync(basePath + utils.getFileSeparator() + 'jsonDB-config.json', data);
callback({
status: REQUEST_CODES.SUCCESS,
msg: 'database created successfully'
});
return;
}
});
}
});
}
}
function dropDatabase(name, callback) {
let errorList = [];
if (! name) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.REQUIRED, 'name')
};
errorList.push(e);
} else {
if (name.length < 2) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_SMALL, 'name')
};
errorList.push(e);
} else if (name.length > 20) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.VALUE_TOO_BIG, 'name')
};
errorList.push(e);
}
if (! validate.isValidString(name)) {
let e = {
status: VALIDATE.FAIL,
error: utils.formatText(VALIDATE.FIELD_VALUE_INVALID, 'name')
};
errorList.push(e);
}
}
if (errorList.length) {
callback({
status: REQUEST_CODES.FAIL,
error: errorList
});
return;
} else {
let basePath = utils.getRootPath() + utils.getFileSeparator() + name;
fs.exists(basePath, function(exists) {
if (exists) {
rimraf(basePath, function () {
callback({
status: REQUEST_CODES.SUCCESS,
error: 'Database deleted with the given name ' + name
});
return;
});
} else {
callback({
status: REQUEST_CODES.FAIL,
error: 'No database exists with the given name ' + name
});
return;
}
});
}
}
module.exports.createDatabase = createDatabase;
module.exports.dropDatabase = dropDatabase;