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239 lines
6.8 KiB
239 lines
6.8 KiB
'use strict';
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module.exports = {
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copy: copy,
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checkDataType: checkDataType,
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checkDataTypes: checkDataTypes,
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coerceToTypes: coerceToTypes,
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toHash: toHash,
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getProperty: getProperty,
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escapeQuotes: escapeQuotes,
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equal: require('fast-deep-equal'),
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ucs2length: require('./ucs2length'),
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varOccurences: varOccurences,
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varReplace: varReplace,
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schemaHasRules: schemaHasRules,
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schemaHasRulesExcept: schemaHasRulesExcept,
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schemaUnknownRules: schemaUnknownRules,
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toQuotedString: toQuotedString,
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getPathExpr: getPathExpr,
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getPath: getPath,
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getData: getData,
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unescapeFragment: unescapeFragment,
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unescapeJsonPointer: unescapeJsonPointer,
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escapeFragment: escapeFragment,
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escapeJsonPointer: escapeJsonPointer
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};
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function copy(o, to) {
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to = to || {};
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for (var key in o) to[key] = o[key];
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return to;
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}
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function checkDataType(dataType, data, strictNumbers, negate) {
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var EQUAL = negate ? ' !== ' : ' === '
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, AND = negate ? ' || ' : ' && '
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, OK = negate ? '!' : ''
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, NOT = negate ? '' : '!';
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switch (dataType) {
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case 'null': return data + EQUAL + 'null';
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case 'array': return OK + 'Array.isArray(' + data + ')';
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case 'object': return '(' + OK + data + AND +
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'typeof ' + data + EQUAL + '"object"' + AND +
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NOT + 'Array.isArray(' + data + '))';
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case 'integer': return '(typeof ' + data + EQUAL + '"number"' + AND +
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NOT + '(' + data + ' % 1)' +
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AND + data + EQUAL + data +
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(strictNumbers ? (AND + OK + 'isFinite(' + data + ')') : '') + ')';
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case 'number': return '(typeof ' + data + EQUAL + '"' + dataType + '"' +
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(strictNumbers ? (AND + OK + 'isFinite(' + data + ')') : '') + ')';
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default: return 'typeof ' + data + EQUAL + '"' + dataType + '"';
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}
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}
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function checkDataTypes(dataTypes, data, strictNumbers) {
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switch (dataTypes.length) {
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case 1: return checkDataType(dataTypes[0], data, strictNumbers, true);
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default:
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var code = '';
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var types = toHash(dataTypes);
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if (types.array && types.object) {
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code = types.null ? '(': '(!' + data + ' || ';
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code += 'typeof ' + data + ' !== "object")';
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delete types.null;
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delete types.array;
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delete types.object;
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}
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if (types.number) delete types.integer;
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for (var t in types)
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code += (code ? ' && ' : '' ) + checkDataType(t, data, strictNumbers, true);
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return code;
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}
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}
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var COERCE_TO_TYPES = toHash([ 'string', 'number', 'integer', 'boolean', 'null' ]);
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function coerceToTypes(optionCoerceTypes, dataTypes) {
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if (Array.isArray(dataTypes)) {
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var types = [];
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for (var i=0; i<dataTypes.length; i++) {
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var t = dataTypes[i];
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if (COERCE_TO_TYPES[t]) types[types.length] = t;
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else if (optionCoerceTypes === 'array' && t === 'array') types[types.length] = t;
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}
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if (types.length) return types;
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} else if (COERCE_TO_TYPES[dataTypes]) {
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return [dataTypes];
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} else if (optionCoerceTypes === 'array' && dataTypes === 'array') {
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return ['array'];
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}
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}
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function toHash(arr) {
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var hash = {};
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for (var i=0; i<arr.length; i++) hash[arr[i]] = true;
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return hash;
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}
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var IDENTIFIER = /^[a-z$_][a-z$_0-9]*$/i;
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var SINGLE_QUOTE = /'|\\/g;
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function getProperty(key) {
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return typeof key == 'number'
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? '[' + key + ']'
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: IDENTIFIER.test(key)
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? '.' + key
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: "['" + escapeQuotes(key) + "']";
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}
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function escapeQuotes(str) {
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return str.replace(SINGLE_QUOTE, '\\$&')
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.replace(/\n/g, '\\n')
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.replace(/\r/g, '\\r')
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.replace(/\f/g, '\\f')
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.replace(/\t/g, '\\t');
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}
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function varOccurences(str, dataVar) {
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dataVar += '[^0-9]';
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var matches = str.match(new RegExp(dataVar, 'g'));
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return matches ? matches.length : 0;
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}
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function varReplace(str, dataVar, expr) {
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dataVar += '([^0-9])';
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expr = expr.replace(/\$/g, '$$$$');
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return str.replace(new RegExp(dataVar, 'g'), expr + '$1');
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}
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function schemaHasRules(schema, rules) {
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if (typeof schema == 'boolean') return !schema;
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for (var key in schema) if (rules[key]) return true;
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}
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function schemaHasRulesExcept(schema, rules, exceptKeyword) {
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if (typeof schema == 'boolean') return !schema && exceptKeyword != 'not';
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for (var key in schema) if (key != exceptKeyword && rules[key]) return true;
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}
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function schemaUnknownRules(schema, rules) {
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if (typeof schema == 'boolean') return;
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for (var key in schema) if (!rules[key]) return key;
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}
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function toQuotedString(str) {
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return '\'' + escapeQuotes(str) + '\'';
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}
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function getPathExpr(currentPath, expr, jsonPointers, isNumber) {
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var path = jsonPointers // false by default
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? '\'/\' + ' + expr + (isNumber ? '' : '.replace(/~/g, \'~0\').replace(/\\//g, \'~1\')')
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: (isNumber ? '\'[\' + ' + expr + ' + \']\'' : '\'[\\\'\' + ' + expr + ' + \'\\\']\'');
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return joinPaths(currentPath, path);
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}
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function getPath(currentPath, prop, jsonPointers) {
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var path = jsonPointers // false by default
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? toQuotedString('/' + escapeJsonPointer(prop))
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: toQuotedString(getProperty(prop));
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return joinPaths(currentPath, path);
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}
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var JSON_POINTER = /^\/(?:[^~]|~0|~1)*$/;
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var RELATIVE_JSON_POINTER = /^([0-9]+)(#|\/(?:[^~]|~0|~1)*)?$/;
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function getData($data, lvl, paths) {
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var up, jsonPointer, data, matches;
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if ($data === '') return 'rootData';
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if ($data[0] == '/') {
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if (!JSON_POINTER.test($data)) throw new Error('Invalid JSON-pointer: ' + $data);
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jsonPointer = $data;
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data = 'rootData';
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} else {
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matches = $data.match(RELATIVE_JSON_POINTER);
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if (!matches) throw new Error('Invalid JSON-pointer: ' + $data);
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up = +matches[1];
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jsonPointer = matches[2];
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if (jsonPointer == '#') {
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if (up >= lvl) throw new Error('Cannot access property/index ' + up + ' levels up, current level is ' + lvl);
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return paths[lvl - up];
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}
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if (up > lvl) throw new Error('Cannot access data ' + up + ' levels up, current level is ' + lvl);
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data = 'data' + ((lvl - up) || '');
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if (!jsonPointer) return data;
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}
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var expr = data;
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var segments = jsonPointer.split('/');
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for (var i=0; i<segments.length; i++) {
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var segment = segments[i];
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if (segment) {
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data += getProperty(unescapeJsonPointer(segment));
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expr += ' && ' + data;
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}
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}
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return expr;
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}
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function joinPaths (a, b) {
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if (a == '""') return b;
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return (a + ' + ' + b).replace(/([^\\])' \+ '/g, '$1');
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}
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function unescapeFragment(str) {
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return unescapeJsonPointer(decodeURIComponent(str));
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}
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function escapeFragment(str) {
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return encodeURIComponent(escapeJsonPointer(str));
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}
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function escapeJsonPointer(str) {
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return str.replace(/~/g, '~0').replace(/\//g, '~1');
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}
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function unescapeJsonPointer(str) {
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return str.replace(/~1/g, '/').replace(/~0/g, '~');
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}
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