realm-js/src/RJSResults.mm

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/* Copyright 2015 Realm Inc - All Rights Reserved
* Proprietary and Confidential
*/
#import "RJSResults.hpp"
#import "RJSObject.hpp"
#import "object_accessor.hpp"
#import "results.hpp"
#import "parser.hpp"
#import "query_builder.hpp"
using namespace realm;
JSValueRef ResultsGetProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef* jsException) {
try {
// index subscripting
Results *results = RJSGetInternal<Results *>(object);
size_t size = results->size();
std::string indexStr = RJSStringForJSString(propertyName);
if (indexStr == "length") {
return JSValueMakeNumber(ctx, size);
}
return RJSObjectCreate(ctx, Object(results->realm, results->object_schema, results->get(RJSValidatedPositiveIndex(indexStr))));
}
catch (std::out_of_range &exp) {
// getters for nonexistent properties in JS should always return undefined
return JSValueMakeUndefined(ctx);
}
catch (std::invalid_argument &exp) {
// for stol failure this could be another property that is handled externally, so ignore
return NULL;
}
catch (std::exception &exp) {
if (jsException) {
*jsException = RJSMakeError(ctx, exp);
}
return NULL;
}
}
bool ResultsSetProperty(JSContextRef ctx, JSObjectRef object, JSStringRef propertyName, JSValueRef value, JSValueRef *jsException) {
try {
std::string indexStr = RJSStringForJSString(propertyName);
if (indexStr != "length") {
std::stol(RJSStringForJSString(propertyName));
}
// attempts to assign to 'length' or an index should throw an exception
if (jsException) {
*jsException = RJSMakeError(ctx, "Results objects are readonly");
}
}
catch (std::invalid_argument &exp) {
// for stol failure this could be another property that is handled externally, so ignore
}
return false;
}
void ResultsPropertyNames(JSContextRef ctx, JSObjectRef object, JSPropertyNameAccumulatorRef propertyNames) {
Results *results = RJSGetInternal<Results *>(object);
char str[32];
for (int i = 0; i < results->table_view.size(); i++) {
sprintf(str, "%i", i);
JSStringRef name = JSStringCreateWithUTF8CString(str);
JSPropertyNameAccumulatorAddName(propertyNames, name);
JSStringRelease(name);
}
}
JSValueRef SortByProperty(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* jsException) {
try {
Results *results = RJSGetInternal<Results *>(thisObject);
RJSValidateArgumentRange(argumentCount, 1, 2);
std::string propName = RJSValidatedStringForValue(ctx, arguments[0]);
Property *prop = results->object_schema.property_for_name(propName);
if (!prop) {
throw std::runtime_error("Property '" + propName + "' does not exist on object type '" + results->object_schema.name + "'");
}
bool ascending = true;
if (argumentCount == 2) {
ascending = JSValueToBoolean(ctx, arguments[1]);
}
SortOrder sort = {{prop->table_column}, {ascending}};
results->setSort(sort);
}
catch (std::exception &exp) {
if (jsException) {
*jsException = RJSMakeError(ctx, exp);
}
}
return NULL;
}
JSObjectRef RJSResultsCreate(JSContextRef ctx, SharedRealm realm, std::string className) {
TableRef table = ObjectStore::table_for_object_type(realm->read_group(), className);
auto object_schema = realm->config().schema->find(className);
if (object_schema == realm->config().schema->end()) {
throw std::runtime_error("Object type '" + className + "' not present in Realm.");
}
return RJSWrapObject<Results *>(ctx, RJSResultsClass(), new Results(realm, *object_schema, table->where()));
}
JSObjectRef RJSResultsCreate(JSContextRef ctx, SharedRealm realm, std::string className, std::string queryString, std::vector<JSValueRef> args) {
TableRef table = ObjectStore::table_for_object_type(realm->read_group(), className);
Query query = table->where();
Schema &schema = *realm->config().schema;
auto object_schema = realm->config().schema->find(className);
if (object_schema == realm->config().schema->end()) {
throw std::runtime_error("Object type '" + className + "' not present in Realm.");
}
parser::Predicate predicate = parser::parse(queryString);
query_builder::ArgumentConverter<JSValueRef, JSContextRef> arguments(ctx, args);
query_builder::apply_predicate(query, predicate, arguments, schema, object_schema->name);
return RJSWrapObject<Results *>(ctx, RJSResultsClass(), new Results(realm, *object_schema, std::move(query)));
}
static const JSStaticFunction RJSResultsFuncs[] = {
{"sortByProperty", SortByProperty, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
{NULL, NULL},
};
JSClassRef RJSResultsClass() {
static JSClassRef s_objectClass = RJSCreateWrapperClass<Results *>("Results", ResultsGetProperty, ResultsSetProperty, RJSResultsFuncs, ResultsPropertyNames);
return s_objectClass;
}