mirror of
https://github.com/Fabio286/antares.git
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376 lines
12 KiB
JavaScript
376 lines
12 KiB
JavaScript
'use strict';
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import mysql from 'mysql';
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import { AntaresCore } from '../AntaresCore';
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export class MySQLClient extends AntaresCore {
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/**
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* @memberof MySQLClient
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*/
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async connect () {
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if (!this._poolSize)
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this._connection = mysql.createConnection(this._params);
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else
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this._connection = mysql.createPool({ ...this._params, connectionLimit: this._poolSize });
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}
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/**
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* @memberof MySQLClient
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*/
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destroy () {
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this._connection.end();
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}
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/**
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* Executes an USE query
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*
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* @param {String} schema
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* @memberof MySQLClient
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*/
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use (schema) {
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return this.raw(`USE \`${schema}\``);
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}
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/**
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* @returns {Array.<Object>} databases scructure
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* @memberof MySQLClient
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*/
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async getStructure () {
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const { rows: databases } = await this.raw('SHOW DATABASES');
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// TODO: SHOW TABLE STATUS FROM `{DATABASE_NAME}`;
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const { rows: tables } = await this
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.select('*')
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.schema('information_schema')
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.from('TABLES')
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.orderBy({ TABLE_SCHEMA: 'ASC', TABLE_NAME: 'ASC' })
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.run();
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const { rows: functions } = await this.raw('SHOW FUNCTION STATUS');
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const { rows: procedures } = await this.raw('SHOW PROCEDURE STATUS');
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const { rows: schedulers } = await this.raw('SELECT *, EVENT_SCHEMA AS `Db`, EVENT_NAME AS `Name` FROM information_schema.`EVENTS`');
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const triggersArr = [];
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for (const db of databases) {
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let { rows: triggers } = await this.raw(`SHOW TRIGGERS FROM \`${db.Database}\``);
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if (triggers.length) {
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triggers = triggers.map(trigger => {
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trigger.Db = db.Database;
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return trigger;
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});
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triggersArr.push(...triggers);
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}
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}
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return databases.map(db => {
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// TABLES
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const remappedTables = tables.filter(table => table.TABLE_SCHEMA === db.Database).map(table => {
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let tableType;
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switch (table.TABLE_TYPE) {
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case 'VIEW':
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tableType = 'view';
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break;
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default:
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tableType = 'table';
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break;
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}
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return {
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name: table.TABLE_NAME,
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type: tableType,
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rows: table.TABLE_ROWS,
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created: table.CREATE_TIME,
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updated: table.UPDATE_TIME,
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engine: table.ENGINE,
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comment: table.TABLE_COMMENT,
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size: table.DATA_LENGTH + table.INDEX_LENGTH,
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autoIncrement: table.AUTO_INCREMENT,
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collation: table.TABLE_COLLATION
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};
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});
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// PROCEDURES
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const remappedProcedures = procedures.filter(procedure => procedure.Db === db.Database).map(procedure => {
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return {
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name: procedure.Name,
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type: procedure.Type,
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definer: procedure.Definer,
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created: procedure.Created,
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updated: procedure.Modified,
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comment: procedure.Comment,
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charset: procedure.character_set_client,
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security: procedure.Security_type
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};
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});
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// SCHEDULERS
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const remappedSchedulers = schedulers.filter(scheduler => scheduler.Db === db.Database).map(scheduler => {
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return {
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name: scheduler.EVENT_NAME,
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definition: scheduler.EVENT_DEFINITION,
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type: scheduler.EVENT_TYPE,
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definer: scheduler.DEFINER,
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body: scheduler.EVENT_BODY,
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starts: scheduler.STARTS,
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ends: scheduler.ENDS,
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status: scheduler.STATUS,
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executeAt: scheduler.EXECUTE_AT,
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intervalField: scheduler.INTERVAL_FIELD,
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intervalValue: scheduler.INTERVAL_VALUE,
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onCompletion: scheduler.ON_COMPLETION,
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originator: scheduler.ORIGINATOR,
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sqlMode: scheduler.SQL_MODE,
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created: scheduler.CREATED,
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updated: scheduler.LAST_ALTERED,
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lastExecuted: scheduler.LAST_EXECUTED,
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comment: scheduler.EVENT_COMMENT,
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charset: scheduler.CHARACTER_SET_CLIENT,
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timezone: scheduler.TIME_ZONE
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};
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});
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// TRIGGERS
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const remappedTriggers = triggersArr.filter(trigger => trigger.Db === db.Database).map(trigger => {
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return {
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name: trigger.Trigger,
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statement: trigger.Statement,
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timing: trigger.Timing,
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definer: trigger.Definer,
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event: trigger.Event,
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table: trigger.Table,
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sqlMode: trigger.sql_mode,
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created: trigger.Created,
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charset: trigger.character_set_client
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};
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});
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return {
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name: db.Database,
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tables: remappedTables,
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functions: functions.filter(func => func.Db === db.Database), // TODO: remap functions
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procedures: remappedProcedures,
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triggers: remappedTriggers,
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schedulers: remappedSchedulers
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};
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});
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}
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/**
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* @param {Object} params
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* @param {String} params.schema
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* @param {String} params.table
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* @returns {Object} table scructure
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* @memberof MySQLClient
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*/
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async getTableColumns ({ schema, table }) {
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const { rows } = await this
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.select('*')
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.schema('information_schema')
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.from('COLUMNS')
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.where({ TABLE_SCHEMA: `= '${schema}'`, TABLE_NAME: `= '${table}'` })
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.orderBy({ ORDINAL_POSITION: 'ASC' })
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.run();
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return rows.map(field => {
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let numLength = field.COLUMN_TYPE.match(/int\(([^)]+)\)/);
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numLength = numLength ? +numLength.pop() : null;
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return {
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name: field.COLUMN_NAME,
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key: field.COLUMN_KEY.toLowerCase(),
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type: field.DATA_TYPE,
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schema: field.TABLE_SCHEMA,
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table: field.TABLE_NAME,
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numPrecision: field.NUMERIC_PRECISION,
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numLength,
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datePrecision: field.DATETIME_PRECISION,
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charLength: field.CHARACTER_MAXIMUM_LENGTH,
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nullable: field.IS_NULLABLE.includes('YES'),
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unsigned: field.COLUMN_TYPE.includes('unsigned'),
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zerofill: field.COLUMN_TYPE.includes('zerofill'),
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order: field.ORDINAL_POSITION,
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default: field.COLUMN_DEFAULT,
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charset: field.CHARACTER_SET_NAME,
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collation: field.COLLATION_NAME,
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autoIncrement: field.EXTRA.includes('auto_increment'),
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comment: field.COLUMN_COMMENT
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};
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});
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}
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/**
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* @param {Object} params
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* @param {String} params.schema
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* @param {String} params.table
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* @returns {Object} table key usage
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* @memberof MySQLClient
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*/
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async getKeyUsage ({ schema, table }) {
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const { rows } = await this
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.select('*')
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.schema('information_schema')
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.from('KEY_COLUMN_USAGE')
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.where({ TABLE_SCHEMA: `= '${schema}'`, TABLE_NAME: `= '${table}'`, REFERENCED_TABLE_NAME: 'IS NOT NULL' })
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.run();
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return rows.map(field => {
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return {
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schema: field.TABLE_SCHEMA,
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table: field.TABLE_NAME,
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column: field.COLUMN_NAME,
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position: field.ORDINAL_POSITION,
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constraintPosition: field.POSITION_IN_UNIQUE_CONSTRAINT,
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constraintName: field.CONSTRAINT_NAME,
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refSchema: field.REFERENCED_TABLE_SCHEMA,
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refTable: field.REFERENCED_TABLE_NAME,
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refColumn: field.REFERENCED_COLUMN_NAME
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};
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});
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}
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/**
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* SHOW COLLATION
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*
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* @returns {Array.<Object>} collations list
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* @memberof MySQLClient
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*/
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async getCollations () {
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const results = await this.raw('SHOW COLLATION');
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return results.rows.map(row => {
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return {
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charset: row.Charset,
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collation: row.Collation,
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compiled: row.Compiled.includes('Yes'),
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default: row.Default.includes('Yes'),
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id: row.Id,
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sortLen: row.Sortlen
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};
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});
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}
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/**
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* SHOW VARIABLES
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*
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* @returns {Array.<Object>} variables list
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* @memberof MySQLClient
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*/
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async getVariables () {
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const sql = 'SHOW VARIABLES';
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const results = await this.raw(sql);
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return results.rows.map(row => {
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return {
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name: row.Variable_name,
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value: row.Value
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};
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});
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}
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/**
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* @returns {String} SQL string
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* @memberof MySQLClient
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*/
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getSQL () {
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// SELECT
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const selectArray = this._query.select.reduce(this._reducer, []);
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let selectRaw = '';
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if (selectArray.length)
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selectRaw = selectArray.length ? `SELECT ${selectArray.join(', ')} ` : 'SELECT * ';
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// FROM
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let fromRaw = '';
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if (!this._query.update.length && !Object.keys(this._query.insert).length && !!this._query.from)
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fromRaw = 'FROM';
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else if (Object.keys(this._query.insert).length)
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fromRaw = 'INTO';
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fromRaw += this._query.from ? ` ${this._query.schema ? `\`${this._query.schema}\`.` : ''}\`${this._query.from}\` ` : '';
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// WHERE
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const whereArray = this._query.where.reduce(this._reducer, []);
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const whereRaw = whereArray.length ? `WHERE ${whereArray.join(' AND ')} ` : '';
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// UPDATE
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const updateArray = this._query.update.reduce(this._reducer, []);
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const updateRaw = updateArray.length ? `SET ${updateArray.join(', ')} ` : '';
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// INSERT
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let insertRaw = '';
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if (Object.keys(this._query.insert).length) {
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const fieldsList = [];
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const valueList = [];
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const fields = this._query.insert;
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for (const key in fields) {
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if (fields[key] === null) continue;
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fieldsList.push(key);
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valueList.push(fields[key]);
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}
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insertRaw = `(${fieldsList.join(', ')}) VALUES (${valueList.join(', ')}) `;
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}
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// GROUP BY
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const groupByArray = this._query.groupBy.reduce(this._reducer, []);
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const groupByRaw = groupByArray.length ? `GROUP BY ${groupByArray.join(', ')} ` : '';
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// ORDER BY
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const orderByArray = this._query.orderBy.reduce(this._reducer, []);
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const orderByRaw = orderByArray.length ? `ORDER BY ${orderByArray.join(', ')} ` : '';
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// LIMIT
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const limitRaw = this._query.limit.length ? `LIMIT ${this._query.limit.join(', ')} ` : '';
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return `${selectRaw}${updateRaw ? 'UPDATE' : ''}${insertRaw ? 'INSERT ' : ''}${this._query.delete ? 'DELETE ' : ''}${fromRaw}${updateRaw}${whereRaw}${groupByRaw}${orderByRaw}${limitRaw}${insertRaw}`;
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}
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/**
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* @param {string} sql raw SQL query
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* @param {boolean} [nest]
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* @returns {Promise}
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* @memberof MySQLClient
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*/
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async raw (sql, nest) {
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const nestTables = nest ? '.' : false;
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const resultsArr = [];
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const queries = sql.split(';');
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if (process.env.NODE_ENV === 'development') this._logger(sql);// TODO: replace BLOB content with a placeholder
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for (const query of queries) {
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if (!query) continue;
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const { rows, report, fields } = await new Promise((resolve, reject) => {
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this._connection.query({ sql: query, nestTables }, (err, response, fields) => {
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if (err)
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reject(err);
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else {
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const remappedFields = fields ? fields.map(field => {
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return {
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name: field.name,
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orgName: field.orgName,
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schema: field.db,
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table: field.table,
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orgTable: field.orgTable,
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type: 'varchar'
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};
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}) : [];
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resolve({
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rows: Array.isArray(response) ? response : false,
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report: !Array.isArray(response) ? response : false,
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fields: remappedFields
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});
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}
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});
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});
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resultsArr.push({ rows, report, fields });
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}
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return resultsArr.length === 1 ? resultsArr[0] : resultsArr;
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}
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}
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