feat: add custom limited input component

package.json

@@ -12,5 +12,8 @@
     "type": "git",
     "url": "git@github.com:MailOnline/mol-conventional-changelog.git"
   },
-  "license": "UNLICENSED"
+  "license": "UNLICENSED",
+  "dependencies": {
+    "inquirer": "^1.2.2"
+  }
 }

prompt/LimitedInput.js

@@ -0,0 +1,53 @@
+const inquirer = require('inquirer');
+const util = require('util');
+
+function LimitedInput() {
+  inquirer.prompt.prompts.input.apply(this, arguments);
+
+  if (!this.opt.maxLength) {
+    this.throwParamError('maxLength');
+  }
+  this.opt._message = this.opt.message;
+  this.spacer = new Array(this.opt.maxLength).fill('-').join('');
+
+  if (this.opt.leadingLabel) {
+    if (typeof this.opt.leadingLabel === 'function') {
+      this.leadingLabel = ' ' + this.opt.leadingLabel(this.answers);
+    } else {
+      this.leadingLabel = ' ' + this.opt.leadingLabel;
+    }
+  } else {
+    this.leadingLabel = '';
+  }
+
+  this.leadingLength = this.leadingLabel.length;
+  this.updateMessage();
+
+  console.log(this.leadingLength)
+}
+
+
+
+util.inherits(LimitedInput, inquirer.prompt.prompts.input);
+
+LimitedInput.prototype.updateMessage = function(e) {
+  this.opt.message = `${this.opt._message}
+[${this.spacer}] ${this.remainingChar()} remaining chars
+${this.leadingLabel}`;
+};
+
+LimitedInput.prototype.remainingChar = function(e) {
+  return (this.opt.maxLength - this.leadingLength) - this.rl.line.length;
+};
+
+LimitedInput.prototype.onKeypress = function(e) {
+  if(this.rl.line.length > (this.opt.maxLength - this.leadingLength)) {
+    this.rl.line = this.rl.line.slice(0, this.opt.maxLength - this.leadingLength);
+    this.rl.cursor--;
+  }
+
+  this.updateMessage();
+  this.render();
+};
+
+module.exports = LimitedInput;