45 lines
950 B
JavaScript
45 lines
950 B
JavaScript
let fs = require('../../lib/core/fs');
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class CommandHistory {
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constructor(options = {}) {
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this.cmdHistoryFile = options.cmdHistoryFile
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|| process.env.DEFAULT_CMD_HISTORY_PATH;
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this.history = [];
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this.pointer = -1;
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this.loadHistory();
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}
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addCommand(cmd) {
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this.history.push(cmd);
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this.pointer = this.history.length;
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}
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getPreviousCommand() {
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if (this.pointer >= 0) {
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this.pointer--;
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}
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return this.history[this.pointer];
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}
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getNextCommand() {
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if (this.pointer >= this.history.length) {
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this.pointer = this.history.length - 1;
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return '';
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}
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this.pointer++;
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return this.history[this.pointer];
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}
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loadHistory() {
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if (fs.existsSync(this.cmdHistoryFile)) {
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fs.readFileSync(this.cmdHistoryFile)
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.toString()
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.split('\n')
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.reverse()
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.forEach((cmd) => { this.addCommand(cmd); })
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}
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}
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}
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module.exports = CommandHistory;
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