sanitizing-String-schema.js

var ht = require('hudson-taylor');
var sanitize = require('sanitize-caja');

//XXX This MUST be invoked before any of our libs are loaded, overrides 
//ht-schema's String validator.
ht.validators.add("String", makeParser(strParser, null));

function strParser(args, childValidators, data) {
    args = merge(args, {min: null, max : null, enum : null, raw : false});
    if(!data && !args.opt) throw new Error("required String");
    if(!data && args.opt) return {htDeleteKey : true};
    var type = typeof data;
    if(type !== "string") throw new Error("required String, recieved " + type+", "+data);
    if(args.min !== null && data.length < args.min) {
        throw new Error("string length must be greater than "+args.min);
    }
    if(args.max !== null && data.length > args.max) {
        throw new Error("string length must be less than or equal to "+args.max);
    }
    if(Array.isArray(args.enum)) {
        var match = false;
        for(var i=0; i<args.enum.length; i++) {
            if(args.enum[i] == data) {
                match = true;
                break;
            }
        }
        if(!match) throw new Error("string does not match enum: "+args.enum);
    }
    if(args.raw) return data;
    return sanitize(data);
}