mirror of
https://github.com/Jermolene/TiddlyWiki5
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118 lines
2.8 KiB
JavaScript
118 lines
2.8 KiB
JavaScript
/*\
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title: $:/core/modules/commander.js
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type: application/javascript
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module-type: global
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The $tw.Commander class is a command interpreter
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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/*
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Parse a sequence of commands
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commandTokens: an array of command string tokens
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wiki: reference to the wiki store object
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streams: {output:, error:}, each of which has a write(string) method
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callback: a callback invoked as callback(err) where err is null if there was no error
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*/
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var Commander = function(commandTokens,callback,wiki,streams) {
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this.commandTokens = commandTokens;
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this.nextToken = 0;
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this.callback = callback;
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this.wiki = wiki;
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this.streams = streams;
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};
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/*
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Execute the sequence of commands and invoke a callback on completion
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*/
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Commander.prototype.execute = function() {
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this.executeNextCommand();
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};
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/*
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Execute the next command in the sequence
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*/
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Commander.prototype.executeNextCommand = function() {
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var self = this;
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// Invoke the callback if there are no more commands
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if(this.nextToken >= this.commandTokens.length) {
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this.callback(null);
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} else {
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// Get and check the command token
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var commandName = this.commandTokens[this.nextToken++];
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if(commandName.substr(0,2) !== "--") {
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this.callback("Missing command");
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} else {
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commandName = commandName.substr(2); // Trim off the --
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// Accumulate the parameters to the command
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var params = [];
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while(this.nextToken < this.commandTokens.length &&
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this.commandTokens[this.nextToken].substr(0,2) !== "--") {
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params.push(this.commandTokens[this.nextToken++]);
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}
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// Get the command info
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var command = $tw.commands[commandName],
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c,err;
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if(!command) {
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this.callback("Unknown command: " + commandName);
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} else {
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if(this.verbose) {
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this.streams.output.write("Executing command: " + commandName + " " + params.join(" ") + "\n");
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}
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if(command.info.synchronous) {
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// Synchronous command
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c = new command.Command(params,this);
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err = c.execute();
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if(err) {
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this.callback(err);
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} else {
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this.executeNextCommand();
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}
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} else {
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// Asynchronous command
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c = new command.Command(params,this,function(err) {
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if(err) {
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self.callback(err);
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} else {
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self.executeNextCommand();
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}
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});
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err = c.execute();
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if(err) {
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this.callback(err);
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}
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}
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}
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}
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}
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};
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Commander.initCommands = function(moduleType) {
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// Install the command modules
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moduleType = moduleType || "command";
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$tw.commands = {};
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var modules = $tw.plugins.moduleTypes[moduleType],
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n,m,f,c;
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if(modules) {
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for(n=0; n<modules.length; n++) {
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m = modules[n];
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$tw.commands[m.info.name] = {};
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c = $tw.commands[m.info.name];
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// Add the methods defined by the module
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for(f in m) {
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c[f] = m[f];
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}
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}
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}
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};
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exports.Commander = Commander;
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})();
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