This app provides monitoring and information features for the common freifunk user and the technical stuff of a freifunk community.
Code base is taken from a TUM Practical Course project and added here to see if Freifunk Altdorf can use it.
https://www.freifunk-altdorf.de
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
273 lines
6.7 KiB
273 lines
6.7 KiB
var at, // The index of the current character |
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ch, // The current character |
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escapee = { |
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'"': '"', |
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'\\': '\\', |
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'/': '/', |
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b: '\b', |
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f: '\f', |
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n: '\n', |
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r: '\r', |
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t: '\t' |
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}, |
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text, |
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error = function (m) { |
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// Call error when something is wrong. |
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throw { |
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name: 'SyntaxError', |
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message: m, |
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at: at, |
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text: text |
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}; |
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}, |
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next = function (c) { |
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// If a c parameter is provided, verify that it matches the current character. |
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if (c && c !== ch) { |
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error("Expected '" + c + "' instead of '" + ch + "'"); |
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} |
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// Get the next character. When there are no more characters, |
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// return the empty string. |
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ch = text.charAt(at); |
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at += 1; |
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return ch; |
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}, |
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number = function () { |
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// Parse a number value. |
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var number, |
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string = ''; |
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if (ch === '-') { |
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string = '-'; |
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next('-'); |
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} |
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while (ch >= '0' && ch <= '9') { |
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string += ch; |
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next(); |
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} |
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if (ch === '.') { |
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string += '.'; |
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while (next() && ch >= '0' && ch <= '9') { |
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string += ch; |
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} |
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} |
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if (ch === 'e' || ch === 'E') { |
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string += ch; |
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next(); |
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if (ch === '-' || ch === '+') { |
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string += ch; |
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next(); |
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} |
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while (ch >= '0' && ch <= '9') { |
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string += ch; |
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next(); |
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} |
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} |
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number = +string; |
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if (!isFinite(number)) { |
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error("Bad number"); |
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} else { |
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return number; |
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} |
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}, |
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string = function () { |
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// Parse a string value. |
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var hex, |
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i, |
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string = '', |
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uffff; |
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// When parsing for string values, we must look for " and \ characters. |
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if (ch === '"') { |
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while (next()) { |
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if (ch === '"') { |
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next(); |
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return string; |
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} else if (ch === '\\') { |
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next(); |
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if (ch === 'u') { |
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uffff = 0; |
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for (i = 0; i < 4; i += 1) { |
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hex = parseInt(next(), 16); |
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if (!isFinite(hex)) { |
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break; |
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} |
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uffff = uffff * 16 + hex; |
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} |
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string += String.fromCharCode(uffff); |
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} else if (typeof escapee[ch] === 'string') { |
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string += escapee[ch]; |
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} else { |
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break; |
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} |
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} else { |
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string += ch; |
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} |
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} |
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} |
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error("Bad string"); |
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}, |
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white = function () { |
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// Skip whitespace. |
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while (ch && ch <= ' ') { |
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next(); |
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} |
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}, |
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word = function () { |
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// true, false, or null. |
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switch (ch) { |
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case 't': |
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next('t'); |
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next('r'); |
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next('u'); |
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next('e'); |
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return true; |
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case 'f': |
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next('f'); |
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next('a'); |
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next('l'); |
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next('s'); |
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next('e'); |
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return false; |
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case 'n': |
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next('n'); |
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next('u'); |
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next('l'); |
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next('l'); |
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return null; |
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} |
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error("Unexpected '" + ch + "'"); |
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}, |
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value, // Place holder for the value function. |
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array = function () { |
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// Parse an array value. |
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var array = []; |
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if (ch === '[') { |
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next('['); |
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white(); |
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if (ch === ']') { |
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next(']'); |
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return array; // empty array |
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} |
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while (ch) { |
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array.push(value()); |
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white(); |
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if (ch === ']') { |
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next(']'); |
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return array; |
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} |
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next(','); |
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white(); |
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} |
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} |
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error("Bad array"); |
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}, |
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object = function () { |
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// Parse an object value. |
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var key, |
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object = {}; |
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if (ch === '{') { |
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next('{'); |
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white(); |
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if (ch === '}') { |
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next('}'); |
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return object; // empty object |
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} |
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while (ch) { |
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key = string(); |
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white(); |
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next(':'); |
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if (Object.hasOwnProperty.call(object, key)) { |
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error('Duplicate key "' + key + '"'); |
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} |
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object[key] = value(); |
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white(); |
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if (ch === '}') { |
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next('}'); |
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return object; |
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} |
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next(','); |
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white(); |
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} |
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} |
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error("Bad object"); |
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}; |
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value = function () { |
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// Parse a JSON value. It could be an object, an array, a string, a number, |
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// or a word. |
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white(); |
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switch (ch) { |
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case '{': |
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return object(); |
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case '[': |
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return array(); |
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case '"': |
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return string(); |
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case '-': |
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return number(); |
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default: |
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return ch >= '0' && ch <= '9' ? number() : word(); |
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} |
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}; |
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// Return the json_parse function. It will have access to all of the above |
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// functions and variables. |
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module.exports = function (source, reviver) { |
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var result; |
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text = source; |
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at = 0; |
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ch = ' '; |
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result = value(); |
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white(); |
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if (ch) { |
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error("Syntax error"); |
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} |
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// If there is a reviver function, we recursively walk the new structure, |
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// passing each name/value pair to the reviver function for possible |
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// transformation, starting with a temporary root object that holds the result |
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// in an empty key. If there is not a reviver function, we simply return the |
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// result. |
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return typeof reviver === 'function' ? (function walk(holder, key) { |
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var k, v, value = holder[key]; |
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if (value && typeof value === 'object') { |
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for (k in value) { |
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if (Object.prototype.hasOwnProperty.call(value, k)) { |
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v = walk(value, k); |
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if (v !== undefined) { |
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value[k] = v; |
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} else { |
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delete value[k]; |
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} |
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} |
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} |
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} |
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return reviver.call(holder, key, value); |
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}({'': result}, '')) : result; |
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};
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