1 | var task = require ('./base'),
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2 | path = require ('path'),
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3 | fs = require ('fs'),
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4 | util = require ('util'),
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5 | stream = require('stream');
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6 |
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7 |
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8 |
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9 | var presenters = {},
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10 | defaultTemplateDir = (typeof project !== "undefined" && project.config && project.config.templateDir) || 'share/presentation',
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11 | isWatched = (typeof project !== "undefined" && project.config && project.config.debug);
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12 |
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13 |
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14 |
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15 |
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16 |
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17 |
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18 |
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19 |
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20 |
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21 | var presenterTask = module.exports = function (config) {
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22 |
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23 | this.headers = {};
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24 | this.init (config);
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25 |
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26 | if (config.headers) util.extend (this.headers, config.headers);
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27 | };
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28 |
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29 | util.inherits (presenterTask, task);
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30 |
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31 | var cache = {};
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32 |
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33 | util.extend (presenterTask.prototype, {
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34 |
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35 | defaultTemplateDir: defaultTemplateDir,
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36 | |
37 |
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38 |
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39 | readTemplate: function (templateIO, cb) {
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40 | templateIO.readFile (function (err, data) {
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41 | cb.call (this, err, data);
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42 | });
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43 | },
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44 |
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45 | isInStaticDir: function (filePath) {
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46 | var httpStatic;
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47 | try {
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48 | httpStatic =
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49 | project.config.initiator.http.static.root.path ||
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50 | project.config.initiator.http.static.root;
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51 | } catch (e) {}
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52 |
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53 | if (httpStatic) {
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54 | var rootPath = project.root.path;
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55 | httpStatic = path.resolve(rootPath, httpStatic);
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56 |
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57 | var dirName = filePath;
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58 |
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59 | while (dirName != rootPath) {
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60 | dirName = path.dirname(dirName);
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61 | if (dirName == httpStatic) {
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62 | return true;
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63 | break;
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64 | }
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65 | }
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66 | }
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67 | return false;
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68 | },
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69 |
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70 | getAbsPath: function () {
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71 | return path.resolve(
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72 | project.root.path, this.defaultTemplateDir, this.file
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73 | );
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74 | },
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75 |
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76 | getTemplateIO: function (callback) {
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77 | var self = this;
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78 | var defTemplate = this.getAbsPath();
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79 | var rootTemplate = path.resolve(project.root.path, this.file);
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80 |
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81 | function isTemplateOk (templateIO) {
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82 |
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83 |
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84 | if (self.isInStaticDir(templateIO)) {
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85 | throw new Error(
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86 | 'Publicly accessible template file at '+templateIO+'!'
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87 | );
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88 | }
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89 | callback (project.root.fileIO (templateIO));
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90 | }
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91 |
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92 | fs.exists(defTemplate, function (exists) {
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93 | if (exists) {
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94 | isTemplateOk (defTemplate);
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95 | } else {
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96 | fs.exists(rootTemplate, function (exists) {
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97 | if (exists) {
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98 | isTemplateOk (rootTemplate);
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99 | } else {
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100 | var statusCode = self.response.statusCode;
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101 | self.response.statusCode = (statusCode >= 200 && statusCode <= 300) ? 500 : statusCode;
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102 |
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103 |
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104 |
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105 | self.renderResult (null, "failure");
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106 | self.emit ("error", "template not found in '" + defTemplate + "' or '" + rootTemplate + "'");
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107 |
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108 | }
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109 |
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110 | });
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111 | }
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112 | });
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113 | },
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114 |
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115 | renderFile: function () {
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116 | var self = this;
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117 |
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118 | this.getTemplateIO(function (templateIO) {
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119 | templateIO.readFile(function (err, data) {
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120 | if (err) {
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121 |
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122 | self.renderResult (null, "failure");
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123 | self.emit ("error", "template error: can't access file " + templateIO.path);
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124 | } else {
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125 | self.renderResult(data.toString());
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126 | }
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127 | });
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128 | });
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129 | },
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130 |
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131 | |
132 |
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133 |
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134 |
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135 | renderCompile: function() {
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136 | var self = this;
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137 |
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138 | if (self.file in cache && cache[self.file]) {
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139 | self.renderProcess(cache[self.file]);
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140 | return;
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141 | }
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142 |
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143 | var templateIO = this.getTemplateIO(function (templateIO) {
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144 | self.readTemplate (templateIO, function (err, tpl) {
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145 | if (err) {
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146 | console.error ("can't access file %s", templateIO.path);
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147 |
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148 | return;
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149 | }
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150 |
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151 | var tplStr = tpl.toString();
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152 |
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153 |
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154 |
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155 |
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156 |
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157 | var compileMethod = self.compileMethod || 'compile';
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158 |
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159 | if (!presenters[self.type])
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160 | presenters[self.type] = require (self.moduleName || self.type);
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161 |
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162 | if (!presenters[self.type][compileMethod]) {
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163 | console.error (
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164 | 'renderer \"' + self.type +
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165 | '\" doesn\'t have a template' +
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166 | 'compilation method named \"' +
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167 | compileMethod + '\"'
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168 | );
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169 | }
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170 |
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171 | if (isWatched) {
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172 |
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173 | self.emit ('log', 'setting up watch for presentation file');
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174 | fs.watch (self.getAbsPath(), function () {
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175 | self.emit ('log', 'presentation file is changed');
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176 | delete cache[self.file];
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177 | });
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178 |
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179 | }
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180 |
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181 | cache[self.file] = presenters[self.type][compileMethod](
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182 | tplStr, self.compileParams || {}
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183 | );
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184 |
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185 | if (self.renderMethod) {
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186 | self.renderProcess(cache[self.file][self.renderMethod].bind(cache[self.file]))
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187 | } else {
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188 | self.renderProcess(cache[self.file]);
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189 | }
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190 |
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191 | });
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192 | });
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193 | },
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194 |
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195 | |
196 |
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197 |
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198 | renderProcess: function(render) {
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199 |
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200 | var responseData;
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201 | try {
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202 | responseData = render (this.vars);
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203 | } catch (e) {
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204 | this.emit ('error', e);
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205 |
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206 | }
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207 | this.renderResult (
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208 | responseData
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209 | );
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210 |
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211 | },
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212 |
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213 | |
214 |
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215 |
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216 |
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217 | renderResult: function(result, failure) {
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218 | if (this.headers) {
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219 | for (var key in this.headers) {
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220 | this.response.setHeader(key, this.headers[key]);
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221 | }
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222 | }
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223 | this.headers.connection = 'close';
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224 |
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225 | if (this.verbose)
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226 | console.log (this.headers, result);
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227 |
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228 | if (!result) {
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229 | this.response.end();
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230 | } else if (result instanceof stream) {
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231 | result.pipe (this.response);
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232 |
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233 | result.on ('error', function (err) {
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234 |
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235 | this.failed (err);
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236 | }.bind (this));
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237 |
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238 | result.on ('close', function () {
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239 | this.completed();
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240 | }.bind (this));
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241 |
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242 | return;
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243 | } else {
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244 | this.response.end(result);
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245 | }
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246 |
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247 | if (!failure) {
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248 | this.completed();
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249 | } else {
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250 | this.failed();
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251 | }
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252 |
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253 | },
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254 |
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255 | |
256 |
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257 |
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258 |
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259 |
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260 | run: function () {
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261 |
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262 | var self = this;
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263 |
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264 | |
265 |
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266 |
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267 |
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268 | |
269 |
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270 |
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271 |
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272 |
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273 |
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274 |
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275 |
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276 |
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277 |
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278 |
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279 |
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280 | |
281 |
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282 |
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283 |
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284 |
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285 |
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286 |
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287 | |
288 |
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289 |
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290 |
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291 |
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292 |
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293 | |
294 |
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295 |
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296 |
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297 |
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298 | |
299 |
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300 |
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301 |
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302 |
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303 | if (self.code) {
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304 | self.response.statusCode = self.code;
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305 | }
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306 |
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307 | if (!self.type) {
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308 | if (self.file) {
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309 |
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310 | self.type = self.file.substring (self.file.lastIndexOf ('.') + 1);;
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311 | self.emit ('log', 'guessed ' + self.type + ' presenter type from filename: ' + self.file);
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312 | } else {
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313 |
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314 | self.renderResult ();
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315 | return;
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316 |
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317 |
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318 | }
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319 | }
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320 |
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321 |
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322 |
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323 | switch (self.type.toLowerCase()) {
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324 | case 'html':
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325 | self.setContentType('text/html; charset=utf-8');
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326 | self.renderFile();
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327 | break;
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328 |
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329 | case 'ejs':
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330 | if (!self.compileParams) {
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331 | self.compileParams = {filename: path.resolve(
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332 | project.root.path, self.defaultTemplateDir, self.file
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333 | )};
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334 | }
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335 | case 'jade':
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336 | case 'mustache':
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337 | case 'handlebars':
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338 |
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339 | self.setContentType(self.headers['content-type'] || 'text/html; charset=utf-8');
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340 |
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341 | self.renderCompile();
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342 | break;
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343 |
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344 | case 'hogan':
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345 | self.setContentType(self.headers['content-type'] || 'text/html; charset=utf-8');
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346 | self.moduleName = 'hogan.js';
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347 | self.renderMethod = 'render';
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348 |
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349 | self.renderCompile();
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350 | break;
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351 |
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352 | case 'json':
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353 | self.setContentType('application/json; charset=utf-8');
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354 | self.renderResult (
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355 | JSON.stringify (self.vars)
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356 | );
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357 | break;
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358 |
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359 | case 'fileasis':
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360 | var mmm;
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361 | try {
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362 | mmm = require ('mmmagic');
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363 | } catch (e) {
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364 | console.error ("module 'mmmagic' not found.",
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365 | "this module required if you plan to use fileAsIs presenter type");
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366 | process.kill();
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367 | }
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368 |
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369 | var Magic = mmm.Magic;
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370 |
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371 | var magic = new Magic(mmm.MAGIC_MIME_TYPE);
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372 | magic.detectFile(self.file, function(err, contentType) {
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373 | if (err) throw err;
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374 |
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375 | self.setContentType(contentType);
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376 | var fileStream = fs.createReadStream(self.file);
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377 | self.renderResult (fileStream);
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378 | });
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379 |
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380 | break;
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381 |
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382 | case 'asis':
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383 | default:
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384 | if (!self.headers['content-type']) {
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385 | var contentType = (self.contentType) ? self.contentType : 'text/plain';
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386 |
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387 | if (!self.noUTF8 || contentType.indexOf ('application/') != 0) {
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388 | contentType += '; charset=utf-8';
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389 | }
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390 |
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391 | self.setContentType(contentType);
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392 | }
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393 |
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394 | self.renderResult (self.vars);
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395 | break;
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396 | }
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397 | },
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398 |
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399 | setContentType: function(value) {
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400 | this.headers['content-type'] = value;
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401 | }
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402 | });
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