# All files / src/lib/progress node-progress.js

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     /* eslint-disable */
    /*
     * Patch #1 for node-progress to fix display issue in certain terminals.
     * Issue related: https://github.com/MarkBind/markbind/issues/416
     * The **only** changes are based on the following PR and its comments:
     * https://github.com/visionmedia/node-progress/pull/168
     * As the above PR is not merged since 2017, this is a temporary patch
     * to fix the issue for markbind's usecase.
     */

    /*
     * Patch #2 for node-progress to allow logging without disturbing the progress bar.
     * The changes are based on the following PR:
     * https://github.com/visionmedia/node-progress/pull/155
     */

    /*!
     * node-progress
     * Copyright(c) 2011 TJ Holowaychuk <tj@vision-media.ca>
     * MIT Licensed
     */

    /**
     * Expose `ProgressBar`.
     */

    exports = module.exports = ProgressBar;

    /**
     * Initialize a `ProgressBar` with the given `fmt` string and `options` or
     * `total`.
     *
     * Options:
     *
     *   - `curr` current completed index
     *   - `total` total number of ticks to complete
     *   - `width` the displayed width of the progress bar defaulting to total
     *   - `stream` the output stream defaulting to stderr
     *   - `head` head character defaulting to complete character
     *   - `complete` completion character defaulting to "="
     *   - `incomplete` incomplete character defaulting to "-"
     *   - `renderThrottle` minimum time between updates in milliseconds defaulting to 16
     *   - `callback` optional function to call when the progress bar completes
     *   - `clear` will clear the progress bar upon termination
     *   - `forceTTY` - optional boolean (true|false) to force stderr to be TTY. This
     *          allows the bar output to be redirected or use tee.
     *
     * Tokens:
     *
     *   - `:bar` the progress bar itself
     *   - `:current` current tick number
     *   - `:total` total ticks
     *   - `:elapsed` time elapsed in seconds
     *   - `:percent` completion percentage
     *   - `:eta` eta in seconds
     *   - `:rate` rate of ticks per second
     *
     * @param {string} fmt
     * @param {object|number} options or total
     * @api public
     */

    function ProgressBar(fmt, options) {
      this.stream = options.stream || process.stderr;

      // patch #1
      // options.forceTTY is undefined in git-bash on mintty Windows
      if (!process.stderr.isTTY) {
        var tty = require('tty').WriteStream.prototype;
        Object.getOwnPropertyNames(tty).forEach(function (key) {
          process.stderr[key] = tty[key];
        });
        process.stderr.columns = 80;
      } // end patch

      if (typeof (options) == 'number') {
        var total = options;
        options = {};
        options.total = total;
      } else {
        options = options || {};
        if ('string' != typeof fmt) throw new Error('format required');
        if ('number' != typeof options.total) throw new Error('total required');
      }

      this.fmt = fmt;
      this.curr = options.curr || 0;
      this.total = options.total;
      this.width = options.width || this.total;
      this.clear = options.clear
      this.chars = {
        complete: options.complete || '=',
        incomplete: options.incomplete || '-',
        head: options.head || (options.complete || '=')
      };
      this.renderThrottle = options.renderThrottle !== 0 ? (options.renderThrottle || 16) : 0;
      this.lastRender = -Infinity;
      this.callback = options.callback || function () { };
      this.tokens = {};
      this.lastDraw = '';
    }

    /**
     * "tick" the progress bar with optional `len` and optional `tokens`.
     *
     * @param {number|object} len or tokens
     * @param {object} tokens
     * @api public
     */

    ProgressBar.prototype.tick = function (len, tokens) {
      if (len !== 0)
        len = len || 1;

      // swap tokens
      if ('object' == typeof len) tokens = len, len = 1;
      if (tokens) this.tokens = tokens;

      // start time for eta
      if (0 == this.curr) this.start = new Date;

      this.curr += len

      // try to render
      this.render();

      // progress complete
      if (this.curr >= this.total) {
        this.render(undefined, true);
        this.complete = true;
        this.terminate();
        this.callback(this);
        return;
      }
    };

    /**
     * Method to render the progress bar with optional `tokens` to place in the
     * progress bar's `fmt` field.
     *
     * @param {object} tokens
     * @api public
     */

    ProgressBar.prototype.render = function (tokens, force) {
      force = force !== undefined ? force : false;
      if (tokens) this.tokens = tokens;

      if (!this.stream.isTTY) return;

      var now = Date.now();
      var delta = now - this.lastRender;
      if (!force && (delta < this.renderThrottle)) {
        return;
      } else {
        this.lastRender = now;
      }

      var ratio = this.curr / this.total;
      ratio = Math.min(Math.max(ratio, 0), 1);

      var percent = Math.floor(ratio * 100);
      var incomplete, complete, completeLength;
      var elapsed = new Date - this.start;
      var eta = (percent == 100) ? 0 : elapsed * (this.total / this.curr - 1);
      var rate = this.curr / (elapsed / 1000);

      /* populate the bar template with percentages and timestamps */
      var str = this.fmt
        .replace(':current', this.curr)
        .replace(':total', this.total)
        .replace(':elapsed', isNaN(elapsed) ? '0.0' : (elapsed / 1000).toFixed(1))
        .replace(':eta', (isNaN(eta) || !isFinite(eta)) ? '0.0' : (eta / 1000)
          .toFixed(1))
        .replace(':percent', percent.toFixed(0) + '%')
        .replace(':rate', Math.round(rate));

      /* compute the available space (non-zero) for the bar */
      var availableSpace = Math.max(0, this.stream.columns - str.replace(':bar', '').length);
      if (availableSpace && process.platform === 'win32') {
        availableSpace = availableSpace - 1;
      }

      var width = Math.min(this.width, availableSpace);

      /* TODO: the following assumes the user has one ':bar' token */
      completeLength = Math.round(width * ratio);
      complete = Array(Math.max(0, completeLength + 1)).join(this.chars.complete);
      incomplete = Array(Math.max(0, width - completeLength + 1)).join(this.chars.incomplete);

      /* add head to the complete string */
      if (completeLength > 0)
        complete = complete.slice(0, -1) + this.chars.head;

      /* fill in the actual progress bar */
      str = str.replace(':bar', complete + incomplete);

      /* replace the extra tokens */
      if (this.tokens) for (var key in this.tokens) str = str.replace(':' + key, this.tokens[key]);

      if (this.lastDraw !== str) {
        this.stream.cursorTo(0);
        this.stream.write(str);
        this.stream.clearLine(1);
        this.lastDraw = str;
      }
    };

    /**
     * "update" the progress bar to represent an exact percentage.
     * The ratio (between 0 and 1) specified will be multiplied by `total` and
     * floored, representing the closest available "tick." For example, if a
     * progress bar has a length of 3 and `update(0.5)` is called, the progress
     * will be set to 1.
     *
     * A ratio of 0.5 will attempt to set the progress to halfway.
     *
     * @param {number} ratio The ratio (between 0 and 1 inclusive) to set the
     *   overall completion to.
     * @api public
     */

    ProgressBar.prototype.update = function (ratio, tokens) {
      var goal = Math.floor(ratio * this.total);
      var delta = goal - this.curr;

      this.tick(delta, tokens);
    };

    /**
     * "interrupt" the progress bar and write a message above it.
     * @param {string} message The message to write.
     * @api public
     */

    ProgressBar.prototype.interrupt = function (message) {
      // clear the current line
      this.stream.clearLine();
      // move the cursor to the start of the line
      this.stream.cursorTo(0);
      // write the message text
      this.stream.write(message);
      // terminate the line after writing the message
      this.stream.write('\n');
      // re-display the progress bar with its lastDraw
      this.stream.write(this.lastDraw);
    };

    /**
     * Terminates a progress bar.
     *
     * @api public
     */

    ProgressBar.prototype.terminate = function () {
      if (this.clear) {
        if (this.stream.clearLine) {
          this.stream.clearLine();
          this.stream.cursorTo(0);
        }
      } else {
        this.stream.write('\n');
      }
    };

    // patch #2 Add interruptBegin & interruptEnd
    /**
     * Begin a interrupt so the user can manually write messages above the bar.
     *
     * @api public
     */

    ProgressBar.prototype.interruptBegin = function () {
      this.stream.clearLine();
      this.stream.cursorTo(0);
    };

    /**
     * End a interrupt, rendering the last draw again.
     *
     * @api public
     */

    ProgressBar.prototype.interruptEnd = function () {
      this.stream.write(this.lastDraw);
    }; // end patch