Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 1 | // TryMongo |
| 2 | // |
| 3 | // Copyright (c) 2009 Kyle Banker |
| 4 | // Licensed under the MIT Licence. |
| 5 | // http://www.opensource.org/licenses/mit-license.php |
| 6 | |
| 7 | // Readline class to handle line input. |
| 8 | var ReadLine = function(options) { |
| 9 | this.options = options || {}; |
| 10 | this.htmlForInput = this.options.htmlForInput; |
| 11 | this.inputHandler = this.options.handler || this.mockHandler; |
| 12 | this.scoper = this.options.scoper; |
| 13 | this.terminal = $(this.options.terminalId || "#terminal"); |
| 14 | this.lineClass = this.options.lineClass || '.readLine'; |
| 15 | this.history = []; |
| 16 | this.historyPtr = 0; |
| 17 | |
| 18 | this.initialize(); |
| 19 | }; |
| 20 | |
| 21 | ReadLine.prototype = { |
| 22 | |
| 23 | initialize: function() { |
| 24 | this.addInputLine(); |
| 25 | }, |
| 26 | |
| 27 | // Enter a new input line with proper behavior. |
| 28 | addInputLine: function(stackLevel) { |
| 29 | stackLevel = stackLevel || 0; |
| 30 | this.terminal.append(this.htmlForInput(stackLevel)); |
| 31 | var ctx = this; |
| 32 | ctx.activeLine = $(this.lineClass + '.active'); |
| 33 | |
| 34 | // Bind key events for entering and navigting history. |
| 35 | ctx.activeLine.bind("keydown", function(ev) { |
| 36 | switch (ev.keyCode) { |
| 37 | case EnterKeyCode: |
| 38 | ctx.processInput(this.value); |
| 39 | break; |
| 40 | case UpArrowKeyCode: |
| 41 | ctx.getCommand('previous'); |
| 42 | break; |
| 43 | case DownArrowKeyCode: |
| 44 | ctx.getCommand('next'); |
| 45 | break; |
| 46 | } |
| 47 | }); |
| 48 | |
| 49 | this.activeLine.focus(); |
| 50 | }, |
| 51 | |
| 52 | // Returns the 'next' or 'previous' command in this history. |
| 53 | getCommand: function(direction) { |
| 54 | if(this.history.length === 0) { |
| 55 | return; |
| 56 | } |
| 57 | this.adjustHistoryPointer(direction); |
| 58 | this.activeLine[0].value = this.history[this.historyPtr]; |
| 59 | $(this.activeLine[0]).focus(); |
| 60 | //this.activeLine[0].value = this.activeLine[0].value; |
| 61 | }, |
| 62 | |
| 63 | // Moves the history pointer to the 'next' or 'previous' position. |
| 64 | adjustHistoryPointer: function(direction) { |
| 65 | if(direction == 'previous') { |
| 66 | if(this.historyPtr - 1 >= 0) { |
| 67 | this.historyPtr -= 1; |
| 68 | } |
| 69 | } |
| 70 | else { |
| 71 | if(this.historyPtr + 1 < this.history.length) { |
| 72 | this.historyPtr += 1; |
| 73 | } |
| 74 | } |
| 75 | }, |
| 76 | |
| 77 | // Return the handler's response. |
| 78 | processInput: function(value) { |
| 79 | var response = this.inputHandler.apply(this.scoper, [value]); |
| 80 | this.insertResponse(response.result); |
| 81 | |
| 82 | // Save to the command history... |
| 83 | if((lineValue = value.trim()) !== "") { |
| 84 | this.history.push(lineValue); |
| 85 | this.historyPtr = this.history.length; |
| 86 | } |
| 87 | |
| 88 | // deactivate the line... |
| 89 | this.activeLine.value = ""; |
| 90 | this.activeLine.attr({disabled: true}); |
| 91 | this.activeLine.removeClass('active'); |
| 92 | |
| 93 | // and add add a new command line. |
| 94 | this.addInputLine(response.stack); |
| 95 | }, |
| 96 | |
| 97 | insertResponse: function(response) { |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 98 | if((response.length < 1) || (response=='"donotprintme"')) { |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 99 | this.activeLine.parent().append("<p class='response'></p>"); |
| 100 | } |
| 101 | else { |
| 102 | this.activeLine.parent().append("<p class='response'>" + response + "</p>"); |
| 103 | } |
| 104 | }, |
| 105 | |
| 106 | // Simply return the entered string if the user hasn't specified a smarter handler. |
| 107 | mockHandler: function(inputString) { |
| 108 | return function() { |
| 109 | this._process = function() { return inputString; }; |
| 110 | }; |
| 111 | } |
| 112 | }; |
| 113 | |
| 114 | var MongoHandler = function() { |
| 115 | this._currentCommand = ""; |
| 116 | this._rawCommand = ""; |
| 117 | this._commandStack = 0; |
| 118 | this._tutorialPtr = 0; |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 119 | this._tutorialMax = 2; |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 120 | |
| 121 | this._mongo = {}; |
| 122 | this._mongo.test = []; |
| 123 | this.collections = []; |
| 124 | }; |
| 125 | |
| 126 | MongoHandler.prototype = { |
| 127 | |
| 128 | _process: function(inputString, errorCheck) { |
| 129 | this._rawCommand += ' ' + inputString; |
| 130 | |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 131 | try { |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 132 | inputString += ' '; // fixes certain bugs with the tokenizer. |
| 133 | var tokens = inputString.tokens(); |
| 134 | var mongoFunc = this._getCommand(tokens); |
| 135 | if(this._commandStack === 0 && inputString.match(/^\s*$/)) { |
| 136 | return {stack: 0, result: ''}; |
| 137 | } |
| 138 | else if(this._commandStack === 0 && mongoFunc) { |
| 139 | this._resetCurrentCommand(); |
| 140 | return {stack: 0, result: mongoFunc.apply(this, [tokens])}; |
| 141 | } |
| 142 | else { |
| 143 | return this._evaluator(tokens); |
| 144 | } |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 145 | } |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 146 | |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 147 | catch(err) { |
| 148 | this._resetCurrentCommand(); |
| 149 | console.trace(); |
| 150 | return {stack: 0, result: "JS Error: " + err}; |
| 151 | } |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 152 | }, |
| 153 | |
| 154 | // Calls eval on the input string when ready. |
| 155 | _evaluator: function(tokens) { |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 156 | isAssignment = tokens.length>=2 && tokens[0].type=="name" && tokens[1].type=="operator" && tokens[1].value=="="; |
| 157 | |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 158 | this._currentCommand += " " + this._massageTokens(tokens); |
| 159 | if(this._shouldEvaluateCommand(tokens)) { |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 160 | opencloud = new OpenCloud(); |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 161 | print = this.print; |
| 162 | |
| 163 | // So this eval statement is the heart of the REPL. |
| 164 | var result = eval(this._currentCommand.trim()); |
| 165 | if(result === undefined) { |
| 166 | throw('result is undefined'); |
| 167 | } else { |
| 168 | result = $htmlFormat(result); |
| 169 | } |
| 170 | this._resetCurrentCommand(); |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 171 | if (isAssignment) { |
| 172 | return {stack: this._commandStack, result: ""}; |
| 173 | } else { |
| 174 | return {stack: this._commandStack, result: result}; |
| 175 | } |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | else { |
| 179 | return {stack: this._commandStack, result: ""}; |
| 180 | } |
| 181 | }, |
| 182 | |
| 183 | _resetCurrentCommand: function() { |
| 184 | this._currentCommand = ''; |
| 185 | this._rawCommand = ''; |
| 186 | }, |
| 187 | |
| 188 | // Evaluate only when we've exited any blocks. |
| 189 | _shouldEvaluateCommand: function(tokens) { |
| 190 | for(var i=0; i < tokens.length; i++) { |
| 191 | var token = tokens[i]; |
| 192 | if(token.type == 'operator') { |
| 193 | if(token.value == '(' || token.value == '{') { |
| 194 | this._commandStack += 1; |
| 195 | } |
| 196 | else if(token.value == ')' || token.value == '}') { |
| 197 | this._commandStack -= 1; |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | if(this._commandStack === 0) { |
| 203 | return true; |
| 204 | } |
| 205 | else { |
| 206 | return false; |
| 207 | } |
| 208 | }, |
| 209 | |
| 210 | _massageTokens: function(tokens) { |
| 211 | for(var i=0; i < tokens.length; i++) { |
| 212 | if(tokens[i].type == 'name') { |
| 213 | if(tokens[i].value == 'var') { |
| 214 | tokens[i].value = ''; |
| 215 | } |
| 216 | } |
| 217 | } |
| 218 | return this._collectTokens(tokens); |
| 219 | }, |
| 220 | |
| 221 | // Collects tokens into a string, placing spaces between variables. |
| 222 | // This methods is called after we scope the vars. |
| 223 | _collectTokens: function(tokens) { |
| 224 | var result = ""; |
| 225 | for(var i=0; i < tokens.length; i++) { |
| 226 | if(tokens[i].type == "name" && tokens[i+1] && tokens[i+1].type == 'name') { |
| 227 | result += tokens[i].value + ' '; |
| 228 | } |
| 229 | else if (tokens[i].type == 'string') { |
| 230 | result += "'" + tokens[i].value + "'"; |
| 231 | } |
| 232 | else { |
| 233 | result += tokens[i].value; |
| 234 | } |
| 235 | } |
| 236 | return result; |
| 237 | }, |
| 238 | |
| 239 | // print output to the screen, e.g., in a loop |
| 240 | // TODO: remove dependency here |
| 241 | print: function() { |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 242 | $('.readLine.active').parent().append('<p>' + JSON.stringify(arguments[0]) + '</p>'); |
| 243 | return "donotprintme"; |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 244 | }, |
| 245 | |
| 246 | /* MongoDB */ |
| 247 | /* ________________________________________ */ |
| 248 | |
| 249 | // help command |
| 250 | _help: function() { |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 251 | return PTAG('HELP') + |
| 252 | PTAG('opencloud.slices.listAll() get all slices'); |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 253 | |
| 254 | }, |
| 255 | |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 256 | _tutorial: function() { |
| 257 | this._tutorialPtr = 0;
|
| 258 | return PTAG("This is a self-guided tutorial on the OpenCloud shell.") +
|
| 259 | PTAG("The tutorial is simple, more or less a few basic commands to try.") +
|
| 260 | PTAG("To go directly to any part tutorial, enter one of the commands t0, t1, t2...t10") +
|
| 261 | PTAG("Otherwise, use 'next' and 'back'. Start by typing 'next' and pressing enter.");
|
| 262 | }, |
| 263 | |
| 264 | // go to the next step in the tutorial. |
| 265 | _next: function() {
|
| 266 | if(this._tutorialPtr < this._tutorialMax) {
|
| 267 | return this['_t' + (this._tutorialPtr + 1)]();
|
| 268 | }
|
| 269 | else {
|
| 270 | return "You've reached the end of the tutorial. To go to the beginning, type 'tutorial'";
|
| 271 | }
|
| 272 | },
|
| 273 |
|
| 274 | // go to the previous step in the tutorial.
|
| 275 | _back: function() {
|
| 276 | if(this._tutorialPtr > 1) {
|
| 277 | return this['_t' + (this._tutorialPtr - 1)]();
|
| 278 | }
|
| 279 | else {
|
| 280 | return this._tutorial();
|
| 281 | }
|
| 282 | }, |
| 283 | |
| 284 | _t1: function() { |
| 285 | this._tutorialPtr = 1;
|
| 286 | return PTAG('1. JavaScript Shell') +
|
| 287 | PTAG('The first thing to notice is that the MongoDB shell is JavaScript-based.') +
|
| 288 | PTAG('So you can do things like:') +
|
| 289 | PTAG(' a = 5; ') +
|
| 290 | PTAG(' a * 10; ') +
|
| 291 | PTAG(' print(a); ') +
|
| 292 | PTAG(" for(i=0; i<10; i++) { print('hello'); }; ") +
|
| 293 | PTAG("Try a few JS commands; when you're ready to move on, enter 'next'");
|
| 294 |
|
| 295 | }, |
| 296 | |
| 297 | _t2: function() { |
| 298 | this._tutorialPtr = 2;
|
| 299 | return PTAG('2. List some slices') +
|
| 300 | PTAG('Type this:') +
|
| 301 | PTAG(' opencloud.slices.listAll();');
|
| 302 |
|
| 303 | }, |
| 304 | |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 305 | _getCommand: function(tokens) { |
| 306 | if(tokens[0] && MongoKeywords.include((tokens[0].value + '').toLowerCase())) { |
| 307 | switch(tokens[0].value.toLowerCase()) { |
| 308 | case 'help': |
| 309 | return this._help; |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 310 | |
| 311 | case 'tutorial': |
| 312 | return this._tutorial;
|
| 313 | case 'next':
|
| 314 | return this._next;
|
| 315 | case 'back':
|
| 316 | return this._back;
|
| 317 | case 't0':
|
| 318 | return this._tutorial;
|
| 319 | case 't1':
|
| 320 | return this._t1; |
| 321 | case 't2': |
| 322 | return this._t2; |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 323 | } |
| 324 | } |
| 325 | } |
| 326 | }; |
| 327 | |
| 328 | $htmlFormat = function(obj) { |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 329 | result=tojson(obj, ' ', ' ', true); |
| 330 | return result; |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 331 | } |
| 332 | |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 333 | function startTerminal() { |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 334 | var mongo = new MongoHandler(); |
| 335 | var terminal = new ReadLine({htmlForInput: DefaultInputHtml, |
| 336 | handler: mongo._process, |
| 337 | scoper: mongo}); |
Scott Baker | bf1610d | 2014-06-18 18:22:03 -0700 | [diff] [blame^] | 338 | $("#terminal_help1").show(); |
| 339 | $("#terminal_help2").show(); |
| 340 | $("#terminal_wait").hide(); |
| 341 | }; |
| 342 | |
| 343 | $(document).ready(function() { |
| 344 | updateOpenCloud(onLoaded = startTerminal); |
Scott Baker | 999edc6 | 2014-06-18 15:40:56 -0700 | [diff] [blame] | 345 | }); |