twitst4tz

twitter statistics web application
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node.js (4339B)


      1 /**
      2  * Module dependencies.
      3  */
      4 
      5 var tty = require('tty');
      6 var util = require('util');
      7 
      8 /**
      9  * This is the Node.js implementation of `debug()`.
     10  *
     11  * Expose `debug()` as the module.
     12  */
     13 
     14 exports = module.exports = require('./debug');
     15 exports.init = init;
     16 exports.log = log;
     17 exports.formatArgs = formatArgs;
     18 exports.save = save;
     19 exports.load = load;
     20 exports.useColors = useColors;
     21 
     22 /**
     23  * Colors.
     24  */
     25 
     26 exports.colors = [ 6, 2, 3, 4, 5, 1 ];
     27 
     28 try {
     29   var supportsColor = require('supports-color');
     30   if (supportsColor && supportsColor.level >= 2) {
     31     exports.colors = [
     32       20, 21, 26, 27, 32, 33, 38, 39, 40, 41, 42, 43, 44, 45, 56, 57, 62, 63, 68,
     33       69, 74, 75, 76, 77, 78, 79, 80, 81, 92, 93, 98, 99, 112, 113, 128, 129, 134,
     34       135, 148, 149, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171,
     35       172, 173, 178, 179, 184, 185, 196, 197, 198, 199, 200, 201, 202, 203, 204,
     36       205, 206, 207, 208, 209, 214, 215, 220, 221
     37     ];
     38   }
     39 } catch (err) {
     40   // swallow - we only care if `supports-color` is available; it doesn't have to be.
     41 }
     42 
     43 /**
     44  * Build up the default `inspectOpts` object from the environment variables.
     45  *
     46  *   $ DEBUG_COLORS=no DEBUG_DEPTH=10 DEBUG_SHOW_HIDDEN=enabled node script.js
     47  */
     48 
     49 exports.inspectOpts = Object.keys(process.env).filter(function (key) {
     50   return /^debug_/i.test(key);
     51 }).reduce(function (obj, key) {
     52   // camel-case
     53   var prop = key
     54     .substring(6)
     55     .toLowerCase()
     56     .replace(/_([a-z])/g, function (_, k) { return k.toUpperCase() });
     57 
     58   // coerce string value into JS value
     59   var val = process.env[key];
     60   if (/^(yes|on|true|enabled)$/i.test(val)) val = true;
     61   else if (/^(no|off|false|disabled)$/i.test(val)) val = false;
     62   else if (val === 'null') val = null;
     63   else val = Number(val);
     64 
     65   obj[prop] = val;
     66   return obj;
     67 }, {});
     68 
     69 /**
     70  * Is stdout a TTY? Colored output is enabled when `true`.
     71  */
     72 
     73 function useColors() {
     74   return 'colors' in exports.inspectOpts
     75     ? Boolean(exports.inspectOpts.colors)
     76     : tty.isatty(process.stderr.fd);
     77 }
     78 
     79 /**
     80  * Map %o to `util.inspect()`, all on a single line.
     81  */
     82 
     83 exports.formatters.o = function(v) {
     84   this.inspectOpts.colors = this.useColors;
     85   return util.inspect(v, this.inspectOpts)
     86     .split('\n').map(function(str) {
     87       return str.trim()
     88     }).join(' ');
     89 };
     90 
     91 /**
     92  * Map %o to `util.inspect()`, allowing multiple lines if needed.
     93  */
     94 
     95 exports.formatters.O = function(v) {
     96   this.inspectOpts.colors = this.useColors;
     97   return util.inspect(v, this.inspectOpts);
     98 };
     99 
    100 /**
    101  * Adds ANSI color escape codes if enabled.
    102  *
    103  * @api public
    104  */
    105 
    106 function formatArgs(args) {
    107   var name = this.namespace;
    108   var useColors = this.useColors;
    109 
    110   if (useColors) {
    111     var c = this.color;
    112     var colorCode = '\u001b[3' + (c < 8 ? c : '8;5;' + c);
    113     var prefix = '  ' + colorCode + ';1m' + name + ' ' + '\u001b[0m';
    114 
    115     args[0] = prefix + args[0].split('\n').join('\n' + prefix);
    116     args.push(colorCode + 'm+' + exports.humanize(this.diff) + '\u001b[0m');
    117   } else {
    118     args[0] = getDate() + name + ' ' + args[0];
    119   }
    120 }
    121 
    122 function getDate() {
    123   if (exports.inspectOpts.hideDate) {
    124     return '';
    125   } else {
    126     return new Date().toISOString() + ' ';
    127   }
    128 }
    129 
    130 /**
    131  * Invokes `util.format()` with the specified arguments and writes to stderr.
    132  */
    133 
    134 function log() {
    135   return process.stderr.write(util.format.apply(util, arguments) + '\n');
    136 }
    137 
    138 /**
    139  * Save `namespaces`.
    140  *
    141  * @param {String} namespaces
    142  * @api private
    143  */
    144 
    145 function save(namespaces) {
    146   if (null == namespaces) {
    147     // If you set a process.env field to null or undefined, it gets cast to the
    148     // string 'null' or 'undefined'. Just delete instead.
    149     delete process.env.DEBUG;
    150   } else {
    151     process.env.DEBUG = namespaces;
    152   }
    153 }
    154 
    155 /**
    156  * Load `namespaces`.
    157  *
    158  * @return {String} returns the previously persisted debug modes
    159  * @api private
    160  */
    161 
    162 function load() {
    163   return process.env.DEBUG;
    164 }
    165 
    166 /**
    167  * Init logic for `debug` instances.
    168  *
    169  * Create a new `inspectOpts` object in case `useColors` is set
    170  * differently for a particular `debug` instance.
    171  */
    172 
    173 function init (debug) {
    174   debug.inspectOpts = {};
    175 
    176   var keys = Object.keys(exports.inspectOpts);
    177   for (var i = 0; i < keys.length; i++) {
    178     debug.inspectOpts[keys[i]] = exports.inspectOpts[keys[i]];
    179   }
    180 }
    181 
    182 /**
    183  * Enable namespaces listed in `process.env.DEBUG` initially.
    184  */
    185 
    186 exports.enable(load());