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amxmodx/modules/json/IJsonMngr.h
Karol Szuster 361a6cc9e0 Introduce a JSON module (#379) 
* Add JSON module

* Merge upstream changes

Fix memory leaks

* Add json include to PackageScript

* Merge upstream changes

Fix memory leaks and increase max nesting

* Fix documentation

* Use AutoPtr in managing JSON handles

* Merge upstream changes

Order of items in an array is preserved after removing an item.

* Merge upstream

* Fix crash

* Add VS projects files and fix mixed tab/spaces

* Remove erroring on "json_free"

* Add comments to "json.inc" file

* Remove overloaded operators

* Use of "override" keyword where needed

* Fix parameter's name
2017-09-30 20:23:12 +02:00

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// vim: set ts=4 sw=4 tw=99 noet:
//
// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
// Copyright (C) The AMX Mod X Development Team.
//
// This software is licensed under the GNU General Public License, version 3 or higher.
// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
// https://alliedmods.net/amxmodx-license
//
// JSON Interface
//
//#include <InterfaceSys.h>
namespace AMXX
{
/**
* @brief Lists of possible handle types.
*/
enum JSONHandleType
{
Handle_Value = 0,
Handle_Array,
Handle_Object
};
/**
* @brief Lists of possible JSON types.
*/
enum JSONType
{
JSONTypeError = -1,
JSONTypeNull = 1,
JSONTypeString = 2,
JSONTypeNumber = 3,
JSONTypeObject = 4,
JSONTypeArray = 5,
JSONTypeBoolean = 6
};
/**
* @brief Represents a Handle ID.
*/
typedef size_t JS_Handle;
/**
* @brief Provides functions for managing JSON.
*/
class IJSONMngr/* : public AMXXInterface*/
{
public:
//virtual unsigned int GetInterfaceVersion() override final { return 1; }
//virtual const char *GetInterfaceName() override final { return "IJsonMngr"; }
virtual ~IJSONMngr() {};
/**
* @brief Checks if handle with specified type is valid.
*
* @param id JSON handle
* @param type Handle's type
*
* @return True if handle is valid, false otherwise
*/
virtual bool IsValidHandle(JS_Handle id, JSONHandleType type = Handle_Value) = 0;
/**
* @brief Frees handle.
*
* @param id JSON handle
*
* @noreturn
*/
virtual void Free(JS_Handle id) = 0;
/**
* @brief Gets JSON type of passed handle.
*
* @param value JSON handle
*
* @return JSON type or JSONTypeError if error occurred
*/
virtual JSONType GetHandleJSONType(JS_Handle value) = 0;
/**
* @brief Parses JSON string or a file that contains JSON.
*
* @note Handle needs to be freed using Free().
*
* @param string String to parse
* @param handle Address to variable where value's handle will be stored
* @param is_file True to treat string param as filename, false otherwise
* @param with_comments True if parsing JSON includes comments (it will ignore them), false otherwise
*
* @return True if succeed, false otherwise
*/
virtual bool Parse(const char *string, JS_Handle *handle, bool is_file = false, bool with_comments = false) = 0;
/**
* @brief Checks if the first value is the same as the second one.
*
* @param value1 JSON handle
* @param value2 JSON handle
*
* @return True if they are the same, false otherwise
*/
virtual bool AreValuesEquals(JS_Handle value1, JS_Handle value2) = 0;
/**
* @brief Validates json by checking if object have identically named
* fields with matching types.
*
* @note Schema {"name":"", "age":0} will validate
* {"name":"Joe", "age":25} and {"name":"Joe", "age":25, "gender":"m"},
* but not {"name":"Joe"} or {"name":"Joe", "age":"Cucumber"}.
*
* @note In case of arrays, only first value in schema is checked against
* all values in tested array.
*
* @note Empty objects ({}) validate all objects,
* empty arrays ([]) validate all arrays,
* null validates values of every type.
*
* @param schema JSON handle
* @param value JSON handle
*
* @return True if passed value is valid, false otherwise
*/
virtual bool IsValueValid(JS_Handle schema, JS_Handle value) = 0;
/**
* @brief Checks if value has parent and assigns it to variable (if provided).
*
* @note Parent's handle needs to be freed using Free().
*
* @param value JSON handle
* @param parent Address to variable where parent's handle will be stored
*
* @return True if value has parent, false otherwise
*/
virtual bool GetValueParent(JS_Handle value, JS_Handle *parent = nullptr) = 0;
/**
* @brief Inits an empty object.
*
* @note Handle needs to be freed using Free().
*
* @param handle Address to variable where value's handle will be stored
*
* @return True if succeed, false otherwise
*/
virtual bool InitObject(JS_Handle *handle) = 0;
/**
* @brief Inits an empty array.
*
* @note Handle needs to be freed using Free().
*
* @param handle Address to variable where value's handle will be stored
*
* @return True if succeed, false otherwise
*/
virtual bool InitArray(JS_Handle *handle) = 0;
/**
* @brief Inits string data.
*
* @note Handle needs to be freed using Free().
*
* @param string String that the handle will be initialized with
* @param handle Address to variable where value's handle will be stored
*
* @return True if succeed, false otherwise
*/
virtual bool InitString(const char *string, JS_Handle *handle) = 0;
/**
* @brief Inits a number.
*
* @note Handle needs to be freed using Free().
*
* @param number Number that the handle will be initialized with
* @param handle Address to variable where value's handle will be stored
*
* @return True if succeed, false otherwise
*/
virtual bool InitNum(double number, JS_Handle *handle) = 0;
/**
* @brief Inits a boolean value.
*
* @note Handle needs to be freed using Free().
*
* @param boolean Boolean value that the handle will be initialized with
* @param handle Address to variable where value's handle will be stored
*
* @return True if succeed, false otherwise
*/
virtual bool InitBool(bool boolean, JS_Handle *handle) = 0;
/**
* @brief Inits a null.
*
* @note Handle needs to be freed using Free().
*
* @param handle Address to variable where value's handle will be stored
*
* @return True if succeed, false otherwise
*/
virtual bool InitNull(JS_Handle *handle) = 0;
/**
* @brief Creates deep copy of passed value.
*
* @note Handle needs to be freed using Free().
*
* @param value JSON handle to be copied
* @param handle Address to variable where value's handle will be stored
*
* @return True if succeed, false otherwise
*/
virtual bool DeepCopyValue(JS_Handle value, JS_Handle *handle) = 0;
/**
* @brief Gets a string data.
*
* @param value JSON handle
*
* @return String data
*/
virtual const char *ValueToString(JS_Handle value) = 0;
/**
* @brief Gets a number.
*
* @param value JSON handle
*
* @return Number
*/
virtual double ValueToNum(JS_Handle value) = 0;
/**
* @brief Gets a boolean value.
*
* @param value JSON handle
*
* @return Boolean value
*/
virtual bool ValueToBool(JS_Handle value) = 0;
//JSON Array API
//Get functions
/**
* @brief Gets a value from the array.
*
* @note Handle needs to be freed using Free().
*
* @param array JSON handle
* @param index Position in the array (starting from 0)
* @param handle Address to variable where value's handle will be stored
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayGetValue(JS_Handle array, size_t index, JS_Handle *handle) = 0;
/**
* @brief Gets string data from the array.
*
* @param array JSON handle
* @param index Position in the array (starting from 0)
*
* @return String data
*/
virtual const char *ArrayGetString(JS_Handle array, size_t index) = 0;
/**
* @brief Gets a number from the array.
*
* @param array JSON handle
* @param index Position in the array (starting from 0)
*
* @return Number
*/
virtual double ArrayGetNum(JS_Handle array, size_t index) = 0;
/**
* @brief Gets a boolean value from the array.
*
* @param array JSON handle
* @param index Position in the array (starting from 0)
*
* @return Boolean value
*/
virtual bool ArrayGetBool(JS_Handle array, size_t index) = 0;
/**
* @brief Gets count of the elements in the array.
*
* @param array JSON handle
*
* @return Number of elements in the array
*/
virtual size_t ArrayGetCount(JS_Handle array) = 0;
//Set functions
/**
* @brief Replaces an element in the array with value.
*
* @param array JSON handle
* @param index Position in the array (starting from 0)
* @param value JSON handle to set
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayReplaceValue(JS_Handle array, size_t index, JS_Handle value) = 0;
/**
* @brief Replaces an element in the array with string.
*
* @param array JSON handle
* @param index Position in the array (starting from 0)
* @param string String to copy
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayReplaceString(JS_Handle array, size_t index, const char *string) = 0;
/**
* @brief Replaces an element in the array with number.
*
* @param array JSON handle
* @param index Position in the array (starting from 0)
* @param number Number to set
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayReplaceNum(JS_Handle array, size_t index, double number) = 0;
/**
* @brief Replaces an element in the array with boolean value.
*
* @param array JSON handle
* @param index Position in the array (starting from 0)
* @param boolean Boolean value to set
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayReplaceBool(JS_Handle array, size_t index, bool boolean) = 0;
/**
* @brief Replaces an element in the array with null.
*
* @param array JSON handle
* @param index Position in the array (starting from 0)
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayReplaceNull(JS_Handle array, size_t index) = 0;
/**
* @brief Appends a value in the array.
*
* @param array JSON handle
* @param value JSON handle
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayAppendValue(JS_Handle array, JS_Handle value) = 0;
/**
* @brief Appends string data in the array.
*
* @param array JSON handle
* @param string String to copy
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayAppendString(JS_Handle array, const char *string) = 0;
/**
* @brief Appends a number in the array.
*
* @param array JSON handle
* @param string Number to set
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayAppendNum(JS_Handle array, double number) = 0;
/**
* @brief Appends a boolean value in the array.
*
* @param array JSON handle
* @param boolean Boolean value to set
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayAppendBool(JS_Handle array, bool boolean) = 0;
/**
* @brief Appends a null in the array.
*
* @param array JSON handle
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayAppendNull(JS_Handle array) = 0;
//Remove functions
/**
* @brief Removes an element from the array.
*
* @note Order of values in array may change during execution.
*
* @param array JSON handle
* @param position Position in the array (starting from 0)
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayRemove(JS_Handle array, size_t index) = 0;
/**
* @brief Removes all elements from the array.
*
* @param array JSON handle
*
* @return True if succeed, false otherwise
*/
virtual bool ArrayClear(JS_Handle array) = 0;
//Wrappers for Object API
//Get functions
/**
* @brief Gets a value from the object.
*
* @note Handle needs to be freed using Free().
* @note If dot notation is used some values may be inaccessible
* because valid names in JSON can contain dots.
*
* @param object JSON handle
* @param name Key name
* @param handle Address to variable where value's handle will be stored
* @param dotfunc True to use dot notation, false to not
*
* @return True if succeed, false otherwise
*/
virtual bool ObjectGetValue(JS_Handle object, const char *name, JS_Handle *handle, bool dotfunc = false) = 0;
/**
* @brief Gets string data from the object.
*
* @note If dot notation is used some values may be inaccessible
* because valid names in JSON can contain dots.
*
* @param object JSON handle
* @param name Key name
* @param dotfunc True to use dot notation, false to not
*
* @return String data
*/
virtual const char *ObjectGetString(JS_Handle object, const char *name, bool dotfunc = false) = 0;
/**
* @brief Gets a number from the object.
*
* @note If dot notation is used some values may be inaccessible
* because valid names in JSON can contain dots.
*
* @param object JSON handle
* @param name Key name
* @param dotfunc True to use dot notation, false to not
*
* @return Number
*/
virtual double ObjectGetNum(JS_Handle object, const char *name, bool dotfunc = false) = 0;
/**
* @brief Gets a boolean value from the object.
*
* @note If dot notation is used some values may be inaccessible
* because valid names in JSON can contain dots.
*
* @param object JSON handle
* @param name Key name
* @param dotfunc True to use dot notation, false to not
*
* @return Boolean value
*/
virtual bool ObjectGetBool(JS_Handle object, const char *name, bool dotfunc = false) = 0;
/**
* @brief Gets count of the keys in the object.
*
* @param object JSON handle
*
* @return Keys count
*/
virtual size_t ObjectGetCount(JS_Handle object) = 0;
/**
* @brief Gets name of the object's key.
*
* @param object JSON handle
* @param index Position from which get key name
*
* @return Key name
*/
virtual const char *ObjectGetName(JS_Handle object, size_t index) = 0;
/**
* @brief Gets a value at the specified position from the object.
*
* @note Handle needs to be freed using Free().
*
* @param object JSON handle
* @param index Position from which get key name
* @param handle Address to variable where value's handle will be stored
*
* @return True if succeed, false otherwise
*/
virtual bool ObjectGetValueAt(JS_Handle object, size_t index, JS_Handle *handle) = 0;
/**
* @brief Checks if object has a value with a specific name and type.
*
* @param object JSON handle
* @param name Key name
* @param type Type of value, if JSONTypeError type will not be checked
* @param dotfunc True to use dot notation, false to not
*
* @return True if has, false if not
*/
virtual bool ObjectHasValue(JS_Handle object, const char *name, JSONType type = JSONTypeError, bool dotfunc = false) = 0;
//Set functions
/**
* @brief Sets a value in the object.
*
* @note If dot notation is used some values may be inaccessible
* because valid names in JSON can contain dots.
* @note It also removes the old value if any.
*
* @param object JSON handle
* @param name Key name
* @param value JSON handle
* @param dotfunc True to use dot notation, false to not
*
* @return True if succeed, false otherwise
*/
virtual bool ObjectSetValue(JS_Handle object, const char *name, JS_Handle value, bool dotfunc = false) = 0;
/**
* @brief Sets string data in the object.
*
* @note If dot notation is used some values may be inaccessible
* because valid names in JSON can contain dots.
* @note It also removes the old value if any.
*
* @param object JSON handle
* @param name Key name
* @param string String to copy
* @param dotfunc True to use dot notation, false to not
*
* @return True if succeed, false otherwise
*/
virtual bool ObjectSetString(JS_Handle object, const char *name, const char *string, bool dotfunc = false) = 0;
/**
* @brief Sets a number in the object.
*
* @note If dot notation is used some values may be inaccessible
* because valid names in JSON can contain dots.
* @note It also removes the old value if any.
*
* @param object JSON handle
* @param name Key name
* @param number Number to set
* @param dotfunc True to use dot notation, false to not
*
* @return True if succeed, false otherwise
*/
virtual bool ObjectSetNum(JS_Handle object, const char *name, double number, bool dotfunc = false) = 0;
/**
* @brief Sets a boolean value in the object.
*
* @note If dot notation is used some values may be inaccessible
* because valid names in JSON can contain dots.
* @note It also removes the old value if any.
*
* @param object JSON handle
* @param name Key name
* @param boolean Boolean value to set
* @param dotfunc True to use dot notation, false to not
*
* @return True if succeed, false otherwise
*/
virtual bool ObjectSetBool(JS_Handle object, const char *name, bool boolean, bool dotfunc = false) = 0;
/**
* @brief Sets a null in the object.
*
* @note If dot notation is used some values may be inaccessible
* because valid names in JSON can contain dots.
* @note It also removes the old value if any.
*
* @param object JSON handle
* @param name Key name
* @param dotfunc True to use dot notation, false to not
*
* @return True if succeed, false otherwise
*/
virtual bool ObjectSetNull(JS_Handle object, const char *name, bool dotfunc = false) = 0;
//Remove functions
/**
* @brief Removes a key and its value in the object.
*
* @note If dot notation is used some values may be inaccessible
* because valid names in JSON can contain dots.
*
* @param object JSON handle
* @param name Key name
* @param dotfunc True to use dot notation, false to not
*
* @return True if succeed, false otherwise
*/
virtual bool ObjectRemove(JS_Handle object, const char *name, bool dotfunc = false) = 0;
/**
* @brief Removes all keys and their values in the object.
*
* @param object JSON handle
*
* @return True if succeed, false otherwise
*/
virtual bool ObjectClear(JS_Handle object) = 0;
//Serialization API
/**
* @brief Gets size of serialization.
*
* @param value JSON handle
* @param pretty True to count size for pretty format, false to not
*
* @return Size of serialized string
*/
virtual size_t SerialSize(JS_Handle value, bool pretty) = 0;
/**
* @brief Copies serialized string to the buffer.
*
* @note The buffer must be large enough or function will
* fail.
*
* @param value JSON handle
* @param buffer Buffer to copy string to
* @param size Size of the buffer
* @param pretty True to format pretty JSON string, false to not
*
* @return True if succeed, false otherwise
*/
virtual bool SerialToBuffer(JS_Handle value, char *buffer, size_t size, bool pretty) = 0;
/**
* @brief Copies serialized string to the file.
*
* @param value JSON handle
* @param filepath Path to the file
* @param pretty True to format pretty JSON string, false to not
*
* @return True if succeed, false otherwise
*/
virtual bool SerialToFile(JS_Handle value, const char *filepath, bool pretty) = 0;
/**
* @brief Returns serialized string.
*
* @note Must be freed using FreeString().
*
* @param value JSON handle
* @param pretty True to format pretty JSON string, false to not
*
* @return Serialized string, nullptr if failed
*/
virtual char *SerialToString(JS_Handle value, bool pretty) = 0;
/**
* @brief Frees serialized string.
*
* @param string Pointer to serialized string
*
* @noreturn
*/
virtual void FreeString(char *string) = 0;
};
}
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