new 'plugin' 'ready' and 'command' functions
This commit is contained in:
parent
5f930b8df3
commit
eb42cf3c11
4 changed files with 664 additions and 78 deletions
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@ -124,7 +124,7 @@ public class ScriptCraftPlugin extends JavaPlugin
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}
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result = true;
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} else if (cmd.getName().equalsIgnoreCase("jsp")){
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javascriptCode = "command.invoke()";
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javascriptCode = "command()";
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this.engine.put("__cmdArgs",args);
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result = true;
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}
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@ -1,7 +1,24 @@
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/*
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This file defines commonly used functions by all plugins...
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load (filename) - loads and evaluates a javascript file, returning the evaluated object.
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save (object, filename) - saves an object to a file.
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plugin (name, interface, isPersistent) - defines a new plugin. If isPersistent is true then
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the plugin doesn't have to worry about loading and saving
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state - that will be done by the framework. Just make sure
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that anything you want to save (and restore) is in the 'store'
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property - this will be created automatically if not already defined.
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(its type is object {} )
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ready (function) - specifies code to be executed only when all the plugins have loaded.
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command (name, function) - defines a command that can be used by non-operators.
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*/
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var global = this;
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var verbose = verbose || false;
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var ScriptCraft = ScriptCraft || {};
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ScriptCraft.core = ScriptCraft.core || {};
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var verbose = true;//verbose || false;
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//
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// private implementation
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//
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@ -11,13 +28,23 @@ ScriptCraft.core = ScriptCraft.core || {};
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//
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if (typeof load == "function")
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return ;
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var _canonize = function(file){ return file.getCanonicalPath().replaceAll("\\\\","/"); };
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var _originalScript = __script;
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//importPackage(java.io);
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var _canonize = function(file){
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return file.getCanonicalPath().replaceAll("\\\\","/");
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};
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var _load = function(filename){
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var parentFileObj = new java.io.File(__script).getParentFile();
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var jsPluginsRootDir = parentFileObj.getParentFile();
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var jsPluginsRootDirName = _canonize(jsPluginsRootDir);
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/*
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Load the contents of the file and evaluate as javascript
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*/
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var _load = function(filename)
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{
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var result = null;
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var file = new java.io.File(filename);
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var canonizedFilename = _canonize(file);
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@ -30,11 +57,17 @@ ScriptCraft.core = ScriptCraft.core || {};
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var reader = new java.io.FileReader(file);
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__engine.put("__script",canonizedFilename);
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__engine.put("__folder",(parent?_canonize(parent):"")+"/");
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__engine.eval(reader);
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result = __engine.eval(reader);
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}else{
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print("Error: " + canonizedFilename + " not found");
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}
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return result;
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};
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/*
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recursively walk the given directory and return a list of all .js files
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*/
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var _listJsFiles = function(store,dir)
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{
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if (typeof dir == "undefined"){
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@ -55,6 +88,11 @@ ScriptCraft.core = ScriptCraft.core || {};
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}
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}
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};
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/*
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Reload all of the .js files in the given directory
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*/
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var _reload = function(pluginDir)
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{
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var jsFiles = [];
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@ -73,6 +111,77 @@ ScriptCraft.core = ScriptCraft.core || {};
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load(_canonize(jsFiles[i]));
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}
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};
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/*
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Save a javascript object to a file (saves using JSON notation)
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*/
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var _save = function(object, filename){
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var objectToStr = JSON.stringify(object);
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var f = new java.io.File(filename);
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print(filename);
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var out = new java.io.PrintWriter(new java.io.FileWriter(f));
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out.println("__data = " + objectToStr);
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out.close();
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};
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/*
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plugin mgmt
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*/
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var _plugins = {};
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var _plugin = function(/* String */ moduleName, /* Object */ moduleObject, isPersistent)
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{
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//
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// don't load plugin more than once
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//
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if (typeof _plugins[moduleName] != "undefined")
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return;
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var pluginData = {persistent: isPersistent, module: moduleObject};
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moduleObject.store = moduleObject.store || {};
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_plugins[moduleName] = pluginData;
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if (isPersistent)
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moduleObject.store = load(jsPluginsRootDirName + "/" + moduleName + "-store.txt") || {};
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global[moduleName] = moduleObject;
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};
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/*
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allow for deferred execution (once all modules have loaded)
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*/
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var _deferred = [];
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var _ready = function( func ){
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_deferred.push(func);
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};
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/*
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command management - allow for non-ops to execute approved javascript code.
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*/
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var _commands = {};
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var _command = function(name,func){
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if (typeof name == "undefined"){
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// it's an invocation from the Java Plugin!
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if (__cmdArgs.length === 0)
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throw new Error("Usage: jsp command-name command-parameters");
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var name = __cmdArgs[0];
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func = _commands[name]
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if (typeof func === "undefined")
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throw new Error("Command '" + name + "' does not exist.");
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var params = [];
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for (var i =1; i < __cmdArgs.length;i++){
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params.push("" + __cmdArgs[i]);
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}
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return func(params);
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}else{
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_commands[name] = func;
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return func;
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}
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};
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/*
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Tab Completion of the /js and /jsp commands
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*/
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var _isJavaObject = function(o){
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var result = false;
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try {
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@ -88,9 +197,11 @@ ScriptCraft.core = ScriptCraft.core || {};
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var _getProperties = function(o)
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{
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var result = [];
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if (_isJavaObject(o)){
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if (_isJavaObject(o))
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{
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propertyLoop:
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for (var i in o){
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for (var i in o)
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{
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//
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// don't include standard Object methods
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//
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@ -117,9 +228,23 @@ ScriptCraft.core = ScriptCraft.core || {};
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}
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return result.sort();
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};
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var __onTabComplete2 = function()
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/*
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Tab completion for the /jsp commmand
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*/
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var __onTabCompleteJSP = function() {
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var result = global.__onTC_result;
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for (var i in _commands)
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result.add(i);
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return result;
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};
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/*
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Tab completion for the /js command
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*/
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var __onTabCompleteJS = function()
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{
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if (__onTC_cmd.name == "jsp")
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return __onTabCompleteJSP()
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var _globalSymbols = _getProperties(global)
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var result = global.__onTC_result;
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var args = global.__onTC_args;
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@ -127,9 +252,9 @@ ScriptCraft.core = ScriptCraft.core || {};
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var statement = args.join(" ");
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statement = statement.replace(/^\s+/,"").replace(/\s+$/,"");
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if (statement.length == 0){
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if (statement.length == 0)
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propsOfLastArg = _globalSymbols;
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}else{
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else{
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var statementSyms = statement.split(/[^a-zA-Z0-9_\.]/);
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var lastSymbol = statementSyms[statementSyms.length-1];
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//
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@ -158,54 +283,68 @@ ScriptCraft.core = ScriptCraft.core || {};
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// ScriptCraft.
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//
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for (var i =0;i < objectProps.length;i++)
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propsOfLastArg.push(statement+objectProps[i]);;
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}else{
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propsOfLastArg.push(statement+objectProps[i]);
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}else{
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// it looks like this..
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// ScriptCraft.co
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//
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var li = statement.lastIndexOf(name);
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statement = statement.substring(0,li);
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for (var i = 0; i < objectProps.length;i++){
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if (objectProps[i].indexOf(name) == 0){
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for (var i = 0; i < objectProps.length;i++)
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if (objectProps[i].indexOf(name) == 0)
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propsOfLastArg.push(statement + objectProps[i]);
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}
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}
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}
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}else{
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var objectProps = _getProperties(symbol);
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for (var i = 0; i < objectProps.length; i++){
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for (var i = 0; i < objectProps.length; i++)
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propsOfLastArg.push(statement + objectProps[i]);
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}
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}
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}else{
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// loop thru globalSymbols looking for a good match
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for (var i = 0;i < _globalSymbols.length; i++){
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if (_globalSymbols[i].indexOf(lastSymbol) == 0){
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for (var i = 0;i < _globalSymbols.length; i++)
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if (_globalSymbols[i].indexOf(lastSymbol) == 0)
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propsOfLastArg.push(statement.replace(lastSymbol,_globalSymbols[i]));
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}
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}
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}
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}
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for (var i = 0;i < propsOfLastArg.length; i++){
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for (var i = 0;i < propsOfLastArg.length; i++)
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result.add(propsOfLastArg[i]);
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}
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};
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global._onTabComplete = __onTabComplete2;
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global.load = _load;
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global.save = _save;
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global.reload = _reload;
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global.plugin = _plugin;
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global.ready = _ready;
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global.command = _command;
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global._onTabComplete = __onTabCompleteJS;
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ScriptCraft.core.load = _load;
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ScriptCraft.core.reload = _reload;
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for (var f in ScriptCraft.core){
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global[f] = ScriptCraft.core[f];
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}
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ScriptCraft.core.initialized = true;
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//
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// assumes this was loaded from js-plugins/core/
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// load all of the plugins.
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//
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reload(new java.io.File(__script).getParentFile().getParentFile());
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reload(jsPluginsRootDir);
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//
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// all modules have loaded
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//
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for (var i =0;i < _deferred.length;i++)
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_deferred[i]();
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events.on("server.PluginDisableEvent",function(l,e){
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//
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// save all plugins which have persistent data
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//
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for (var moduleName in _plugins){
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var pluginData = _plugins[moduleName];
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if (pluginData.persistent)
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save(pluginData.module.store, jsPluginsRootDirName + "/" + moduleName + "-store.txt");
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}
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});
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}());
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@ -1,39 +0,0 @@
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/*
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This module is responsible for managing commands which can be used by non-operator.
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Since by default the /js command is op-only , there needs to be a way to expose javascript
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functions/plugins to non-ops in a safe controlled way.
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This is where the 'command' module comes in. It allows javascript plugin authors to expose
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javascript functions for use by non-operators. For example, ordinarily, non-ops don't have
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permission to use the `/time set 0` command but this functionality can be exposed like this.
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1. Operator / plugin-author creates a javascript function called 'day'
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var time_set = function(params){ __plugin.server.worlds.get(0).time = params[0]; };
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command.register('time_set');
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2. The non-operator can now change the time to day...
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/jsp time_set 0
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plugin("command", {
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register: function(name, func){
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this.store[name] = func;
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},
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invoke: function(){
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if (__cmdArgs.length === 0)
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throw new Error("Usage: jsp command-name command-parameters");
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var name = __cmdArgs[0];
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var func = this.store[name]
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if (typeof func === "undefined")
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throw new Error("Command '" + name + "' does not exist.");
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var params = [];
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for (var i =1; i < __cmdArgs.length;i++){
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params.push("" + __cmdArgs[i]);
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}
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func(params);
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}
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});
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*/
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486
js-plugins/ext/json2.js
Normal file
486
js-plugins/ext/json2.js
Normal file
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/*
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json2.js
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2012-10-08
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Public Domain.
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NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
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See http://www.JSON.org/js.html
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This code should be minified before deployment.
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See http://javascript.crockford.com/jsmin.html
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USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
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NOT CONTROL.
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This file creates a global JSON object containing two methods: stringify
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and parse.
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JSON.stringify(value, replacer, space)
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value any JavaScript value, usually an object or array.
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replacer an optional parameter that determines how object
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values are stringified for objects. It can be a
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function or an array of strings.
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space an optional parameter that specifies the indentation
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of nested structures. If it is omitted, the text will
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be packed without extra whitespace. If it is a number,
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it will specify the number of spaces to indent at each
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level. If it is a string (such as '\t' or ' '),
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it contains the characters used to indent at each level.
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This method produces a JSON text from a JavaScript value.
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When an object value is found, if the object contains a toJSON
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method, its toJSON method will be called and the result will be
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stringified. A toJSON method does not serialize: it returns the
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value represented by the name/value pair that should be serialized,
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or undefined if nothing should be serialized. The toJSON method
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will be passed the key associated with the value, and this will be
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bound to the value
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For example, this would serialize Dates as ISO strings.
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Date.prototype.toJSON = function (key) {
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function f(n) {
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// Format integers to have at least two digits.
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return n < 10 ? '0' + n : n;
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}
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return this.getUTCFullYear() + '-' +
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f(this.getUTCMonth() + 1) + '-' +
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f(this.getUTCDate()) + 'T' +
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f(this.getUTCHours()) + ':' +
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f(this.getUTCMinutes()) + ':' +
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f(this.getUTCSeconds()) + 'Z';
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};
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You can provide an optional replacer method. It will be passed the
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key and value of each member, with this bound to the containing
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object. The value that is returned from your method will be
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serialized. If your method returns undefined, then the member will
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be excluded from the serialization.
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If the replacer parameter is an array of strings, then it will be
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used to select the members to be serialized. It filters the results
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such that only members with keys listed in the replacer array are
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stringified.
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Values that do not have JSON representations, such as undefined or
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functions, will not be serialized. Such values in objects will be
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dropped; in arrays they will be replaced with null. You can use
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a replacer function to replace those with JSON values.
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JSON.stringify(undefined) returns undefined.
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The optional space parameter produces a stringification of the
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value that is filled with line breaks and indentation to make it
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easier to read.
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If the space parameter is a non-empty string, then that string will
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be used for indentation. If the space parameter is a number, then
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the indentation will be that many spaces.
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Example:
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text = JSON.stringify(['e', {pluribus: 'unum'}]);
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// text is '["e",{"pluribus":"unum"}]'
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text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
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// text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
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text = JSON.stringify([new Date()], function (key, value) {
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return this[key] instanceof Date ?
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'Date(' + this[key] + ')' : value;
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});
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// text is '["Date(---current time---)"]'
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JSON.parse(text, reviver)
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This method parses a JSON text to produce an object or array.
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It can throw a SyntaxError exception.
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The optional reviver parameter is a function that can filter and
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transform the results. It receives each of the keys and values,
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and its return value is used instead of the original value.
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If it returns what it received, then the structure is not modified.
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If it returns undefined then the member is deleted.
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Example:
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// Parse the text. Values that look like ISO date strings will
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// be converted to Date objects.
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myData = JSON.parse(text, function (key, value) {
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var a;
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if (typeof value === 'string') {
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a =
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/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
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if (a) {
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return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
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+a[5], +a[6]));
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}
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}
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return value;
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});
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myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
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var d;
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if (typeof value === 'string' &&
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value.slice(0, 5) === 'Date(' &&
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value.slice(-1) === ')') {
|
||||
d = new Date(value.slice(5, -1));
|
||||
if (d) {
|
||||
return d;
|
||||
}
|
||||
}
|
||||
return value;
|
||||
});
|
||||
|
||||
|
||||
This is a reference implementation. You are free to copy, modify, or
|
||||
redistribute.
|
||||
*/
|
||||
|
||||
/*jslint evil: true, regexp: true */
|
||||
|
||||
/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
|
||||
call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
|
||||
getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
|
||||
lastIndex, length, parse, prototype, push, replace, slice, stringify,
|
||||
test, toJSON, toString, valueOf
|
||||
*/
|
||||
|
||||
|
||||
// Create a JSON object only if one does not already exist. We create the
|
||||
// methods in a closure to avoid creating global variables.
|
||||
|
||||
if (typeof JSON !== 'object') {
|
||||
JSON = {};
|
||||
}
|
||||
|
||||
(function () {
|
||||
'use strict';
|
||||
|
||||
function f(n) {
|
||||
// Format integers to have at least two digits.
|
||||
return n < 10 ? '0' + n : n;
|
||||
}
|
||||
|
||||
if (typeof Date.prototype.toJSON !== 'function') {
|
||||
|
||||
Date.prototype.toJSON = function (key) {
|
||||
|
||||
return isFinite(this.valueOf())
|
||||
? this.getUTCFullYear() + '-' +
|
||||
f(this.getUTCMonth() + 1) + '-' +
|
||||
f(this.getUTCDate()) + 'T' +
|
||||
f(this.getUTCHours()) + ':' +
|
||||
f(this.getUTCMinutes()) + ':' +
|
||||
f(this.getUTCSeconds()) + 'Z'
|
||||
: null;
|
||||
};
|
||||
|
||||
String.prototype.toJSON =
|
||||
Number.prototype.toJSON =
|
||||
Boolean.prototype.toJSON = function (key) {
|
||||
return this.valueOf();
|
||||
};
|
||||
}
|
||||
|
||||
var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
|
||||
escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
|
||||
gap,
|
||||
indent,
|
||||
meta = { // table of character substitutions
|
||||
'\b': '\\b',
|
||||
'\t': '\\t',
|
||||
'\n': '\\n',
|
||||
'\f': '\\f',
|
||||
'\r': '\\r',
|
||||
'"' : '\\"',
|
||||
'\\': '\\\\'
|
||||
},
|
||||
rep;
|
||||
|
||||
|
||||
function quote(string) {
|
||||
|
||||
// If the string contains no control characters, no quote characters, and no
|
||||
// backslash characters, then we can safely slap some quotes around it.
|
||||
// Otherwise we must also replace the offending characters with safe escape
|
||||
// sequences.
|
||||
|
||||
escapable.lastIndex = 0;
|
||||
return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
|
||||
var c = meta[a];
|
||||
return typeof c === 'string'
|
||||
? c
|
||||
: '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
|
||||
}) + '"' : '"' + string + '"';
|
||||
}
|
||||
|
||||
|
||||
function str(key, holder) {
|
||||
|
||||
// Produce a string from holder[key].
|
||||
|
||||
var i, // The loop counter.
|
||||
k, // The member key.
|
||||
v, // The member value.
|
||||
length,
|
||||
mind = gap,
|
||||
partial,
|
||||
value = holder[key];
|
||||
|
||||
// If the value has a toJSON method, call it to obtain a replacement value.
|
||||
|
||||
if (value && typeof value === 'object' &&
|
||||
typeof value.toJSON === 'function') {
|
||||
value = value.toJSON(key);
|
||||
}
|
||||
|
||||
// If we were called with a replacer function, then call the replacer to
|
||||
// obtain a replacement value.
|
||||
|
||||
if (typeof rep === 'function') {
|
||||
value = rep.call(holder, key, value);
|
||||
}
|
||||
|
||||
// What happens next depends on the value's type.
|
||||
|
||||
switch (typeof value) {
|
||||
case 'string':
|
||||
return quote(value);
|
||||
|
||||
case 'number':
|
||||
|
||||
// JSON numbers must be finite. Encode non-finite numbers as null.
|
||||
|
||||
return isFinite(value) ? String(value) : 'null';
|
||||
|
||||
case 'boolean':
|
||||
case 'null':
|
||||
|
||||
// If the value is a boolean or null, convert it to a string. Note:
|
||||
// typeof null does not produce 'null'. The case is included here in
|
||||
// the remote chance that this gets fixed someday.
|
||||
|
||||
return String(value);
|
||||
|
||||
// If the type is 'object', we might be dealing with an object or an array or
|
||||
// null.
|
||||
|
||||
case 'object':
|
||||
|
||||
// Due to a specification blunder in ECMAScript, typeof null is 'object',
|
||||
// so watch out for that case.
|
||||
|
||||
if (!value) {
|
||||
return 'null';
|
||||
}
|
||||
|
||||
// Make an array to hold the partial results of stringifying this object value.
|
||||
|
||||
gap += indent;
|
||||
partial = [];
|
||||
|
||||
// Is the value an array?
|
||||
|
||||
if (Object.prototype.toString.apply(value) === '[object Array]') {
|
||||
|
||||
// The value is an array. Stringify every element. Use null as a placeholder
|
||||
// for non-JSON values.
|
||||
|
||||
length = value.length;
|
||||
for (i = 0; i < length; i += 1) {
|
||||
partial[i] = str(i, value) || 'null';
|
||||
}
|
||||
|
||||
// Join all of the elements together, separated with commas, and wrap them in
|
||||
// brackets.
|
||||
|
||||
v = partial.length === 0
|
||||
? '[]'
|
||||
: gap
|
||||
? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
|
||||
: '[' + partial.join(',') + ']';
|
||||
gap = mind;
|
||||
return v;
|
||||
}
|
||||
|
||||
// If the replacer is an array, use it to select the members to be stringified.
|
||||
|
||||
if (rep && typeof rep === 'object') {
|
||||
length = rep.length;
|
||||
for (i = 0; i < length; i += 1) {
|
||||
if (typeof rep[i] === 'string') {
|
||||
k = rep[i];
|
||||
v = str(k, value);
|
||||
if (v) {
|
||||
partial.push(quote(k) + (gap ? ': ' : ':') + v);
|
||||
}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
|
||||
// Otherwise, iterate through all of the keys in the object.
|
||||
|
||||
for (k in value) {
|
||||
if (Object.prototype.hasOwnProperty.call(value, k)) {
|
||||
v = str(k, value);
|
||||
if (v) {
|
||||
partial.push(quote(k) + (gap ? ': ' : ':') + v);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Join all of the member texts together, separated with commas,
|
||||
// and wrap them in braces.
|
||||
|
||||
v = partial.length === 0
|
||||
? '{}'
|
||||
: gap
|
||||
? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
|
||||
: '{' + partial.join(',') + '}';
|
||||
gap = mind;
|
||||
return v;
|
||||
}
|
||||
}
|
||||
|
||||
// If the JSON object does not yet have a stringify method, give it one.
|
||||
|
||||
if (typeof JSON.stringify !== 'function') {
|
||||
JSON.stringify = function (value, replacer, space) {
|
||||
|
||||
// The stringify method takes a value and an optional replacer, and an optional
|
||||
// space parameter, and returns a JSON text. The replacer can be a function
|
||||
// that can replace values, or an array of strings that will select the keys.
|
||||
// A default replacer method can be provided. Use of the space parameter can
|
||||
// produce text that is more easily readable.
|
||||
|
||||
var i;
|
||||
gap = '';
|
||||
indent = '';
|
||||
|
||||
// If the space parameter is a number, make an indent string containing that
|
||||
// many spaces.
|
||||
|
||||
if (typeof space === 'number') {
|
||||
for (i = 0; i < space; i += 1) {
|
||||
indent += ' ';
|
||||
}
|
||||
|
||||
// If the space parameter is a string, it will be used as the indent string.
|
||||
|
||||
} else if (typeof space === 'string') {
|
||||
indent = space;
|
||||
}
|
||||
|
||||
// If there is a replacer, it must be a function or an array.
|
||||
// Otherwise, throw an error.
|
||||
|
||||
rep = replacer;
|
||||
if (replacer && typeof replacer !== 'function' &&
|
||||
(typeof replacer !== 'object' ||
|
||||
typeof replacer.length !== 'number')) {
|
||||
throw new Error('JSON.stringify');
|
||||
}
|
||||
|
||||
// Make a fake root object containing our value under the key of ''.
|
||||
// Return the result of stringifying the value.
|
||||
|
||||
return str('', {'': value});
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
// If the JSON object does not yet have a parse method, give it one.
|
||||
|
||||
if (typeof JSON.parse !== 'function') {
|
||||
JSON.parse = function (text, reviver) {
|
||||
|
||||
// The parse method takes a text and an optional reviver function, and returns
|
||||
// a JavaScript value if the text is a valid JSON text.
|
||||
|
||||
var j;
|
||||
|
||||
function walk(holder, key) {
|
||||
|
||||
// The walk method is used to recursively walk the resulting structure so
|
||||
// that modifications can be made.
|
||||
|
||||
var k, v, value = holder[key];
|
||||
if (value && typeof value === 'object') {
|
||||
for (k in value) {
|
||||
if (Object.prototype.hasOwnProperty.call(value, k)) {
|
||||
v = walk(value, k);
|
||||
if (v !== undefined) {
|
||||
value[k] = v;
|
||||
} else {
|
||||
delete value[k];
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return reviver.call(holder, key, value);
|
||||
}
|
||||
|
||||
|
||||
// Parsing happens in four stages. In the first stage, we replace certain
|
||||
// Unicode characters with escape sequences. JavaScript handles many characters
|
||||
// incorrectly, either silently deleting them, or treating them as line endings.
|
||||
|
||||
text = String(text);
|
||||
cx.lastIndex = 0;
|
||||
if (cx.test(text)) {
|
||||
text = text.replace(cx, function (a) {
|
||||
return '\\u' +
|
||||
('0000' + a.charCodeAt(0).toString(16)).slice(-4);
|
||||
});
|
||||
}
|
||||
|
||||
// In the second stage, we run the text against regular expressions that look
|
||||
// for non-JSON patterns. We are especially concerned with '()' and 'new'
|
||||
// because they can cause invocation, and '=' because it can cause mutation.
|
||||
// But just to be safe, we want to reject all unexpected forms.
|
||||
|
||||
// We split the second stage into 4 regexp operations in order to work around
|
||||
// crippling inefficiencies in IE's and Safari's regexp engines. First we
|
||||
// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
|
||||
// replace all simple value tokens with ']' characters. Third, we delete all
|
||||
// open brackets that follow a colon or comma or that begin the text. Finally,
|
||||
// we look to see that the remaining characters are only whitespace or ']' or
|
||||
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
|
||||
|
||||
if (/^[\],:{}\s]*$/
|
||||
.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
|
||||
.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
|
||||
.replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
|
||||
|
||||
// In the third stage we use the eval function to compile the text into a
|
||||
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
|
||||
// in JavaScript: it can begin a block or an object literal. We wrap the text
|
||||
// in parens to eliminate the ambiguity.
|
||||
|
||||
j = eval('(' + text + ')');
|
||||
|
||||
// In the optional fourth stage, we recursively walk the new structure, passing
|
||||
// each name/value pair to a reviver function for possible transformation.
|
||||
|
||||
return typeof reviver === 'function'
|
||||
? walk({'': j}, '')
|
||||
: j;
|
||||
}
|
||||
|
||||
// If the text is not JSON parseable, then a SyntaxError is thrown.
|
||||
|
||||
throw new SyntaxError('JSON.parse');
|
||||
};
|
||||
}
|
||||
}());
|
Reference in a new issue