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/*!
* Module dependencies.
*/
var utils = require('./utils');
var Types = require('./schema/index');
var ALLOWED_GEOWITHIN_GEOJSON_TYPES = ['Polygon', 'MultiPolygon'];
/**
* Handles internal casting for queries
*
* @param {Schema} schema
* @param {Object} obj Object to cast
* @api private
*/
module.exports = function cast(schema, obj) {
var paths = Object.keys(obj),
i = paths.length,
_keys,
any$conditionals,
schematype,
nested,
path,
type,
val;
while (i--) {
path = paths[i];
val = obj[path];
if (path === '$or' || path === '$nor' || path === '$and') {
var k = val.length;
while (k--) {
val[k] = cast(schema, val[k]);
}
} else if (path === '$where') {
type = typeof val;
if (type !== 'string' && type !== 'function') {
throw new Error('Must have a string or function for $where');
}
if (type === 'function') {
obj[path] = val.toString();
}
continue;
} else if (path === '$elemMatch') {
val = cast(schema, val);
} else {
if (!schema) {
// no casting for Mixed types
continue;
}
schematype = schema.path(path);
if (!schematype) {
// Handle potential embedded array queries
var split = path.split('.'),
j = split.length,
pathFirstHalf,
pathLastHalf,
remainingConds;
// Find the part of the var path that is a path of the Schema
while (j--) {
pathFirstHalf = split.slice(0, j).join('.');
schematype = schema.path(pathFirstHalf);
if (schematype) {
break;
}
}
// If a substring of the input path resolves to an actual real path...
if (schematype) {
// Apply the casting; similar code for $elemMatch in schema/array.js
if (schematype.caster && schematype.caster.schema) {
remainingConds = {};
pathLastHalf = split.slice(j).join('.');
remainingConds[pathLastHalf] = val;
obj[path] = cast(schematype.caster.schema, remainingConds)[pathLastHalf];
} else {
obj[path] = val;
}
continue;
}
if (utils.isObject(val)) {
// handle geo schemas that use object notation
// { loc: { long: Number, lat: Number }
var geo = '';
if (val.$near) {
geo = '$near';
} else if (val.$nearSphere) {
geo = '$nearSphere';
} else if (val.$within) {
geo = '$within';
} else if (val.$geoIntersects) {
geo = '$geoIntersects';
} else if (val.$geoWithin) {
geo = '$geoWithin';
}
if (!geo) {
continue;
}
var numbertype = new Types.Number('__QueryCasting__');
var value = val[geo];
if (val.$maxDistance != null) {
val.$maxDistance = numbertype.castForQuery(val.$maxDistance);
}
if (val.$minDistance != null) {
val.$minDistance = numbertype.castForQuery(val.$minDistance);
}
if (geo === '$within') {
var withinType = value.$center
|| value.$centerSphere
|| value.$box
|| value.$polygon;
if (!withinType) {
throw new Error('Bad $within paramater: ' + JSON.stringify(val));
}
value = withinType;
} else if (geo === '$near' &&
typeof value.type === 'string' && Array.isArray(value.coordinates)) {
// geojson; cast the coordinates
value = value.coordinates;
} else if ((geo === '$near' || geo === '$nearSphere' || geo === '$geoIntersects') &&
value.$geometry && typeof value.$geometry.type === 'string' &&
Array.isArray(value.$geometry.coordinates)) {
if (value.$maxDistance != null) {
value.$maxDistance = numbertype.castForQuery(value.$maxDistance);
}
if (value.$minDistance != null) {
value.$minDistance = numbertype.castForQuery(value.$minDistance);
}
if (utils.isMongooseObject(value.$geometry)) {
value.$geometry = value.$geometry.toObject({ transform: false });
}
value = value.$geometry.coordinates;
} else if (geo === '$geoWithin') {
if (value.$geometry) {
if (utils.isMongooseObject(value.$geometry)) {
value.$geometry = value.$geometry.toObject({ virtuals: false });
}
var geoWithinType = value.$geometry.type;
if (ALLOWED_GEOWITHIN_GEOJSON_TYPES.indexOf(geoWithinType) === -1) {
throw new Error('Invalid geoJSON type for $geoWithin "' +
geoWithinType + '", must be "Polygon" or "MultiPolygon"');
}
value = value.$geometry.coordinates;
} else {
value = value.$box || value.$polygon || value.$center ||
value.$centerSphere;
if (utils.isMongooseObject(value)) {
value = value.toObject({ virtuals: false });
}
}
}
_cast(value, numbertype);
}
} else if (val === null || val === undefined) {
obj[path] = null;
continue;
} else if (val.constructor.name === 'Object') {
any$conditionals = Object.keys(val).some(function(k) {
return k.charAt(0) === '$' && k !== '$id' && k !== '$ref';
});
if (!any$conditionals) {
obj[path] = schematype.castForQuery(val);
} else {
var ks = Object.keys(val),
$cond;
k = ks.length;
while (k--) {
$cond = ks[k];
nested = val[$cond];
if ($cond === '$exists') {
if (typeof nested !== 'boolean') {
throw new Error('$exists parameter must be Boolean');
}
continue;
}
if ($cond === '$not') {
if (nested && schematype && !schematype.caster) {
_keys = Object.keys(nested);
if (_keys.length && _keys[0].charAt(0) === '$') {
for (var key in nested) {
nested[key] = schematype.castForQuery(key, nested[key]);
}
} else {
val[$cond] = schematype.castForQuery($cond, nested);
}
continue;
}
cast(schematype.caster ? schematype.caster.schema : schema, nested);
} else {
val[$cond] = schematype.castForQuery($cond, nested);
}
}
}
} else {
obj[path] = schematype.castForQuery(val);
}
}
}
return obj;
};
function _cast(val, numbertype) {
if (Array.isArray(val)) {
val.forEach(function(item, i) {
if (Array.isArray(item) || utils.isObject(item)) {
return _cast(item, numbertype);
}
val[i] = numbertype.castForQuery(item);
});
} else {
var nearKeys = Object.keys(val);
var nearLen = nearKeys.length;
while (nearLen--) {
var nkey = nearKeys[nearLen];
var item = val[nkey];
if (Array.isArray(item) || utils.isObject(item)) {
_cast(item, numbertype);
val[nkey] = item;
} else {
val[nkey] = numbertype.castForQuery(item);
}
}
}
}
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