debian-control/lib/paragraphStream.js

Parse package control files from Debian

// Generated by CoffeeScript 2.4.1
(function() {
  // paragraphStream.coffee
  // Copyright 2019 Patrick Meade.

  // This program is free software: you can redistribute it and/or modify
  // it under the terms of the GNU General Public License as published by
  // the Free Software Foundation, either version 3 of the License, or
  // (at your option) any later version.

  // This program is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  // GNU General Public License for more details.

  // You should have received a copy of the GNU General Public License
  // along with this program.  If not, see <https://www.gnu.org/licenses/>.
  //----------------------------------------------------------------------
  var LINE_MIDDLE, LINE_START, Transform;

  ({Transform} = require("stream"));

  LINE_START = "LINE_START";

  LINE_MIDDLE = "LINE_MIDDLE";

  exports.ParagraphStream = class ParagraphStream extends Transform {
    constructor(options) {
      super(options || {});
      this.linebuffer = "";
      this.parabuffer = [];
      this.state = LINE_START;
    }

    _transform(chunk, encoding, callback) {
      var c, chunkstr, i, len;
      chunkstr = chunk.toString();
      for (i = 0, len = chunkstr.length; i < len; i++) {
        c = chunkstr[i];
        if (this.state === LINE_START) {
          if (c === "\n") {
            if (this.parabuffer.length > 0) {
              this.push(this.parabuffer.join(""));
              this.parabuffer = [];
            }
          } else {
            this.state = LINE_MIDDLE;
            this.linebuffer += c;
          }
        } else {
          this.linebuffer += c;
          if (c === "\n") {
            this.parabuffer.push(this.linebuffer);
            this.linebuffer = "";
            this.state = LINE_START;
          }
        }
      }
      return callback();
    }

    _flush(callback) {
      if (this.linebuffer.length > 0) {
        this.parabuffer.push(this.linebuffer);
      }
      if (this.parabuffer.length > 0) {
        this.push(this.parabuffer.join(""));
      }
      return callback();
    }

  };

  //----------------------------------------------------------------------
// end of paragraphStream.coffee

}).call(this);