| 1 | | // Package for formatting JSON data in a coloured |
| 2 | | // YAML-style, perfect for CLI output |
| 3 | | |
| 4 | | // ### Export package |
| 5 | 1 | module.exports = exports; |
| 6 | | |
| 7 | | |
| 8 | | // ### Module dependencies |
| 9 | 1 | var colors = require('colors'); |
| 10 | 1 | var Utils = require('./utils'); |
| 11 | 1 | var fs = require('fs'); |
| 12 | | |
| 13 | | // ### Package version |
| 14 | 1 | exports.version = JSON.parse(fs.readFileSync(__dirname + '/../package.json', 'utf8')).version; |
| 15 | | |
| 16 | | // ### Render function |
| 17 | | // *Parameters:* |
| 18 | | // |
| 19 | | // * **`data`**: Data to render |
| 20 | | // * **`options`**: Hash with different options to configure the parser |
| 21 | | // * **`indentation`**: Base indentation of the parsed output |
| 22 | | // |
| 23 | | // *Example of options hash:* |
| 24 | | // |
| 25 | | // { |
| 26 | | // emptyArrayMsg: '(empty)', // Rendered message on empty strings |
| 27 | | // keysColor: 'blue', // Color for keys in hashes |
| 28 | | // dashColor: 'red', // Color for the dashes in arrays |
| 29 | | // defaultIndentation: 2 // Indentation on nested objects |
| 30 | | // } |
| 31 | 1 | exports.render = function render(data, options, indentation) { |
| 32 | 57 | "use strict"; |
| 33 | | |
| 34 | | // Default value for the indentation param |
| 35 | 57 | indentation = indentation || 0; |
| 36 | | |
| 37 | | // Default values for the options |
| 38 | 57 | options = options || {}; |
| 39 | 57 | options.emptyArrayMsg = options.emptyArrayMsg || '(empty array)'; |
| 40 | 57 | options.keysColor = options.keysColor || "green"; |
| 41 | 57 | options.dashColor = options.dashColor || "green"; |
| 42 | 57 | options.defaultIndentation = options.defaultIndentation || 2; |
| 43 | | |
| 44 | | // Initialize the output (it's an array of lines) |
| 45 | 57 | var output = []; |
| 46 | | |
| 47 | | // Helper function to detect if an object can be serializable directly |
| 48 | 57 | var isSerializable = function(input) { |
| 49 | 81 | if (typeof input === 'string' || typeof input === 'boolean' || |
| 50 | | typeof input === 'number' || input === null) { |
| 51 | 54 | return true; |
| 52 | | } |
| 53 | 27 | return false; |
| 54 | | }; |
| 55 | | |
| 56 | 57 | var addColorToData = function(input) { |
| 57 | 36 | if (typeof input === 'string') { |
| 58 | | // Print strings in regular terminal color |
| 59 | 32 | return input; |
| 60 | | } |
| 61 | | |
| 62 | 4 | if (input === true) { |
| 63 | 1 | return (input+'').green; |
| 64 | | } |
| 65 | 3 | if (input === false) { |
| 66 | 1 | return (input+'').red; |
| 67 | | } |
| 68 | 2 | if (input === null) { |
| 69 | 1 | return (input+'').grey; |
| 70 | | } |
| 71 | 1 | if (typeof input === 'number') { |
| 72 | 1 | return (input+'').blue; |
| 73 | | } |
| 74 | 0 | return (input+''); |
| 75 | | }; |
| 76 | | |
| 77 | | // Render a string exactly equal |
| 78 | 57 | if (isSerializable(data)) { |
| 79 | 36 | output.push(Utils.indent(indentation) + addColorToData(data)); |
| 80 | | } |
| 81 | 21 | else if (Array.isArray(data)) { |
| 82 | | // If the array is empty, render the `emptyArrayMsg` |
| 83 | 9 | if (data.length === 0) { |
| 84 | 2 | output.push(Utils.indent(indentation) + options.emptyArrayMsg); |
| 85 | | } else { |
| 86 | 7 | data.forEach(function(element) { |
| 87 | | // Prepend the dash at the begining of each array's element line |
| 88 | 14 | var line = Utils.indent(indentation) + ('- ')[options.dashColor]; |
| 89 | | |
| 90 | | // If the element of the array is a string, render it in the same line |
| 91 | 14 | if (typeof element === 'string') { |
| 92 | 12 | line += exports.render(element, options); |
| 93 | 12 | output.push(line); |
| 94 | | |
| 95 | | // If the element of the array is an array or object, render it in next line |
| 96 | | } else { |
| 97 | 2 | output.push(line); |
| 98 | 2 | output.push( |
| 99 | | exports.render(element, options, indentation + options.defaultIndentation) |
| 100 | | ); |
| 101 | | } |
| 102 | | }); |
| 103 | | } |
| 104 | | } |
| 105 | 12 | else if (typeof data === 'object') { |
| 106 | | // Get the size of the longest index to render all the values on the same column |
| 107 | 12 | var maxIndexLength = Utils.getMaxIndexLength(data); |
| 108 | 12 | var key; |
| 109 | | |
| 110 | 12 | for(var i in data) { |
| 111 | | // Prepend the index at the beginning of the line |
| 112 | 24 | key = Utils.indent(indentation) + (i + ': ')[options.keysColor]; |
| 113 | | |
| 114 | | // If the value is serializable, render it in the same line |
| 115 | 24 | if (isSerializable(data[i])) { |
| 116 | 18 | key += exports.render(data[i], options, maxIndexLength - i.length); |
| 117 | 18 | output.push(key); |
| 118 | | |
| 119 | | // If the index is an array or object, render it in next line |
| 120 | | } else { |
| 121 | 6 | output.push(key); |
| 122 | 6 | output.push( |
| 123 | | exports.render(data[i], options, indentation + options.defaultIndentation) |
| 124 | | ); |
| 125 | | } |
| 126 | | } |
| 127 | | } |
| 128 | | // Return all the lines as a string |
| 129 | 57 | return output.join('\n'); |
| 130 | | }; |
| 131 | | |
| 132 | | // ### Render from string function |
| 133 | | // *Parameters:* |
| 134 | | // |
| 135 | | // * **`data`**: Data to render as a string |
| 136 | | // * **`options`**: Hash with different options to configure the parser |
| 137 | | // * **`indentation`**: Base indentation of the parsed output |
| 138 | | // |
| 139 | | // *Example of options hash:* |
| 140 | | // |
| 141 | | // { |
| 142 | | // emptyArrayMsg: '(empty)', // Rendered message on empty strings |
| 143 | | // keysColor: 'blue', // Color for keys in hashes |
| 144 | | // dashColor: 'red', // Color for the dashes in arrays |
| 145 | | // defaultIndentation: 2 // Indentation on nested objects |
| 146 | | // } |
| 147 | 1 | exports.renderString = function renderString(data, options, indentation) { |
| 148 | 6 | "use strict"; |
| 149 | | |
| 150 | 6 | var output = ''; |
| 151 | 6 | var parsedData; |
| 152 | | // If the input is not a string or if it's empty, just return an empty string |
| 153 | 6 | if (typeof data !== 'string' || data === '') { |
| 154 | 2 | return ''; |
| 155 | | } |
| 156 | | |
| 157 | | // Remove non-JSON characters from the beginning string |
| 158 | 4 | if (data[0] !== '{' && data[0] !== '[') { |
| 159 | 3 | var beginingOfJson; |
| 160 | 3 | if (data.indexOf('{') === -1) { |
| 161 | 2 | beginingOfJson = data.indexOf('['); |
| 162 | 1 | } else if (data.indexOf('[') === -1) { |
| 163 | 1 | beginingOfJson = data.indexOf('{'); |
| 164 | | } else { |
| 165 | 0 | beginingOfJson = data.indexOf('{') < data.indexOf('[') ? data.indexOf('{') : data.indexOf('['); |
| 166 | | } |
| 167 | 3 | output += data.substr(0, beginingOfJson) + "\n"; |
| 168 | 3 | data = data.substr(beginingOfJson); |
| 169 | | } |
| 170 | | |
| 171 | 4 | try { |
| 172 | 4 | parsedData = JSON.parse(data); |
| 173 | | } catch (e) { |
| 174 | | // Return an error in case of an invalid JSON |
| 175 | 1 | return 'Error:'.red + ' Not valid JSON!'; |
| 176 | | } |
| 177 | | |
| 178 | | // Call the real render() method |
| 179 | 3 | output += exports.render(parsedData); |
| 180 | 3 | return output; |
| 181 | | }; |