transit-im/middleware/command_parser/parser.js

express-like framework for AIM bots creation (ICQ as well)

// Generated by CoffeeScript 1.6.3
(function() {
  var _;

  _ = require('underscore');

  module.exports = {
    parseCommand: function(command) {
      var args, cmd, firstSpaceIdx, inQuotes, newArg, part, parts, _i, _len;
      firstSpaceIdx = command.indexOf(' ');
      args = [];
      if (firstSpaceIdx > -1) {
        cmd = command.substring(0, firstSpaceIdx).trim();
        parts = command.substring(firstSpaceIdx).split(' ');
        inQuotes = false;
        newArg = '';
        for (_i = 0, _len = parts.length; _i < _len; _i++) {
          part = parts[_i];
          if (part.trim().length === 0) {
            continue;
          }
          if (part[0] === '"') {
            inQuotes = true;
            part = part.substring(1);
          }
          if (part[part.length - 1] === '"') {
            inQuotes = false;
            part = part.substring(0, part.length - 1);
          }
          if (newArg.length > 0) {
            newArg += ' ';
          }
          newArg += part;
          if (!inQuotes) {
            args.push(newArg);
            newArg = '';
          }
        }
      } else {
        cmd = command;
      }
      return {
        cmd: cmd,
        args: args
      };
    },
    processArgs: function(commandPattern, argCallback) {
      var args, cmd, _ref;
      _ref = this.parseCommand(commandPattern), cmd = _ref.cmd, args = _ref.args;
      return [cmd].concat(args.map(argCallback).map(function(a) {
        if (a.indexOf(' ') >= 0) {
          return '"' + a + '"';
        } else {
          return a;
        }
      })).join(" ");
    },
    parsePattern: function(pattern, cb) {
      var parsed, part, parts, _i, _len;
      if (cb == null) {
        cb = function() {};
      }
      parts = pattern.split(' ');
      parsed = {
        cmd: parts.shift(),
        args: [],
        restArg: null,
        match: function(cmd, args) {
          if (cmd !== this.cmd) {
            return null;
          }
          return this.collectArgs(args);
        },
        collectArgs: function(args) {
          var arg, index, map, _i, _len;
          map = {};
          if (this.restArg) {
            map[this.restArg] = [];
          }
          for (index = _i = 0, _len = args.length; _i < _len; index = ++_i) {
            arg = args[index];
            if (this.args[index]) {
              map[this.args[index]] = arg;
            } else if (this.restArg) {
              map[this.restArg].push(arg);
            }
          }
          return {
            args: map,
            cb: cb
          };
        }
      };
      for (_i = 0, _len = parts.length; _i < _len; _i++) {
        part = parts[_i];
        if (part[0] === '{') {
          part = part.substring(1, part.length - 1);
        }
        if (part[0] === '{') {
          parsed.restArg = part.substring(1, part.length - 1);
        } else {
          parsed.args.push(part);
        }
      }
      return parsed;
    },
    forEachPortion: function(text, maxPortionLength, forPortion) {
      var CRLF, buffer, index, length, lengths, lines, sum, _i, _len;
      lines = text.split("\n");
      lengths = lines.map(function(l) {
        return l.length;
      });
      if (Math.max.apply(null, lengths) > maxPortionLength) {
        throw "Cannot split text - there are lines larger than specified limit";
      }
      buffer = [];
      sum = 0;
      CRLF = 1;
      for (index = _i = 0, _len = lengths.length; _i < _len; index = ++_i) {
        length = lengths[index];
        if (sum + length > maxPortionLength) {
          forPortion(buffer.join("\n"));
          buffer = [];
          sum = 0;
        }
        buffer.push(lines[index]);
        sum += length + CRLF;
      }
      if (buffer.length) {
        return forPortion(buffer.join("\n"));
      }
    }
  };

}).call(this);