55 lines
1.2 KiB
JavaScript
55 lines
1.2 KiB
JavaScript
'use strict';
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const EventEmitter = require('events').EventEmitter;
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const Timers = require('timers');
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class Command extends EventEmitter {
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constructor() {
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super();
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this.next = null;
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}
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// slow. debug only
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stateName() {
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const state = this.next;
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for (const i in this) {
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if (this[i] === state && i !== 'next') {
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return i;
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}
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}
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return 'unknown name';
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}
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execute(packet, connection) {
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if (!this.next) {
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this.next = this.start;
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connection._resetSequenceId();
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}
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if (packet && packet.isError()) {
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const err = packet.asError(connection.clientEncoding);
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err.sql = this.sql || this.query;
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if (this.queryTimeout) {
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Timers.clearTimeout(this.queryTimeout);
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this.queryTimeout = null;
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}
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if (this.onResult) {
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this.onResult(err);
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this.emit('end');
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} else {
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this.emit('error', err);
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this.emit('end');
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}
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return true;
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}
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// TODO: don't return anything from execute, it's ugly and error-prone. Listen for 'end' event in connection
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this.next = this.next(packet, connection);
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if (this.next) {
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return false;
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}
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this.emit('end');
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return true;
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}
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}
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module.exports = Command;
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