jsondiffpatch/src/processor.js

Diff & Patch for Javascript objects

var Processor = function Processor(options){
  this.selfOptions = options || {};
  this.pipes = {};
};

Processor.prototype.options = function(options) {
  if (options) {
    this.selfOptions = options;
  }
  return this.selfOptions;
};

Processor.prototype.pipe = function(name, pipe) {
  if (typeof name === 'string') {
    if (typeof pipe === 'undefined') {
      return this.pipes[name];
    } else {
      this.pipes[name] = pipe;
    }
  }
  if (name && name.name) {
    pipe = name;
    if (pipe.processor === this) { return pipe; }
    this.pipes[pipe.name] = pipe;
  }
  pipe.processor = this;
  return pipe;
};

Processor.prototype.process = function(input, pipe) {
  var context = input;
  context.options = this.options();
  var nextPipe = pipe || input.pipe || 'default';
  var lastPipe, lastContext;
  while (nextPipe) {
    if (typeof context.nextAfterChildren !== 'undefined') {
      // children processed and coming back to parent
      context.next = context.nextAfterChildren;
      context.nextAfterChildren = null;
    }

    if (typeof nextPipe === 'string') {
      nextPipe = this.pipe(nextPipe);
    }
    nextPipe.process(context);
    lastContext = context;
    lastPipe = nextPipe;
    nextPipe = null;
    if (context) {
      if (context.next) {
        context = context.next;
        nextPipe = lastContext.nextPipe || context.pipe || lastPipe;
      }
    }
  }
  return context.hasResult ? context.result : undefined;
};

exports.Processor = Processor;