68 lines
1.7 KiB
JavaScript
68 lines
1.7 KiB
JavaScript
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var util = require('../util');
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function JsonParser() { }
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JsonParser.prototype.parse = function(value, shape) {
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return translate(JSON.parse(value), shape);
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};
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function translate(value, shape) {
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if (!shape || value === undefined) return undefined;
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switch (shape.type) {
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case 'structure': return translateStructure(value, shape);
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case 'map': return translateMap(value, shape);
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case 'list': return translateList(value, shape);
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default: return translateScalar(value, shape);
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}
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}
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function translateStructure(structure, shape) {
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if (structure == null) return undefined;
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var struct = {};
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var shapeMembers = shape.members;
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util.each(shapeMembers, function(name, memberShape) {
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var locationName = memberShape.isLocationName ? memberShape.name : name;
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if (Object.prototype.hasOwnProperty.call(structure, locationName)) {
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var value = structure[locationName];
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var result = translate(value, memberShape);
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if (result !== undefined) struct[name] = result;
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}
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});
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return struct;
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}
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function translateList(list, shape) {
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if (list == null) return undefined;
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var out = [];
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util.arrayEach(list, function(value) {
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var result = translate(value, shape.member);
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if (result === undefined) out.push(null);
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else out.push(result);
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});
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return out;
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}
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function translateMap(map, shape) {
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if (map == null) return undefined;
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var out = {};
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util.each(map, function(key, value) {
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var result = translate(value, shape.value);
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if (result === undefined) out[key] = null;
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else out[key] = result;
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});
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return out;
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}
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function translateScalar(value, shape) {
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return shape.toType(value);
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}
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/**
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* @api private
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*/
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module.exports = JsonParser;
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