343 lines
11 KiB
C
343 lines
11 KiB
C
#pragma once
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#include <ikarus/errors.h>
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#include <ikarus/macros.h>
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#include <ikarus/stdtypes.h>
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/// \file entity.h
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/// \author Folling <mail@folling.io>
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/// \defgroup entities Entities
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/// \brief Entities are the core building blocks of Ikarus.
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IKARUS_BEGIN_HEADER
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/// \brief Entities are the core building blocks of Ikarus.
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/// \details Entities store a number of values associated with a name or property.
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///
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/// For documentation on the types and layout of values \see values.h.
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///
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/// Entities can be linked to blueprints.
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/// The entity has a (possibly uninitialized) value for each property of all
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/// blueprints it is linked to. \see property.h \see blueprint.h.
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///
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/// We distinguish between `EntityValues` and `EntityPropertyValues`.
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/// `EntityValues` are a direct part of the entity.
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/// `EntityPropertyValues` are an indirect part of the entity, linked to them
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/// via a blueprint.
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struct IkarusEntity;
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/// \brief Flags for creating an entity.
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enum IkarusEntityCreateFlags {
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/// \brief No flags.
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IkarusEntityCreateFlags_None = 0,
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};
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/// \brief Creates a new entity.
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/// \param project The project to create the entity in.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param name The name of the entity.
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/// \pre \li Must not be null.
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/// \pre \li Must not be empty.
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/// \param flags Flags for creating the entity.
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/// \param error_out \see errors.h
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/// \return The created entity or null if an error occurs.
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IKA_API IkarusEntity * ikarus_entity_create(
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struct IkarusProject * project,
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char const * name,
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IkarusEntityCreateFlags flags,
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IkarusErrorData * error_out
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);
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/// \brief Flags for deleting an entity.
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enum IkarusEntityDeleteFlags {
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/// \brief No flags.
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IkarusEntityDeleteFlags_None = 0,
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};
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/// \brief Deletes an entity and its values.
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/// \param entity The entity to delete.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param flags Flags for deleting the entity.
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/// \param error_out \see errors.h
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IKA_API void ikarus_entity_delete(
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IkarusEntity * entity,
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IkarusEntityDeleteFlags flags,
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IkarusErrorData * error_out
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);
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/// \brief Flags for copying an entity.
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enum IkarusEntityCopyFlags {
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/// \brief No flags.
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IkarusEntityCopyFlags_None = 0,
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};
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/// \brief Copies an entity.
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/// \param entity The entity to copy.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param flags Flags for copying the entity.
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/// \param error_out \see errors.h
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/// \return The copied entity or null if an error occurs.
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IKA_API IkarusEntity * ikarus_entity_copy(
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IkarusEntity * entity,
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IkarusEntityCopyFlags flags,
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IkarusErrorData * error_out
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);
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/// \brief Gets the project an entity belongs to.
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/// \param entity The entity to get the project of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param error_out \see errors.h
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/// \return The project the entity belongs to.
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IKA_API struct IkarusProject *
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ikarus_entity_get_project(IkarusEntity * entity, IkarusErrorData * error_out);
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/// \brief Gets the name of an entity.
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/// \param entity The entity to get the name of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param error_out \see errors.h
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/// \return The name of the entity.
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IKA_API char const *
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ikarus_entity_get_name(IkarusEntity * entity, IkarusErrorData * error_out);
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/// \brief Flags for setting the name of an entity.
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enum IkarusEntitySetNameFlags {
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/// \brief No flags.
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IkarusEntitySetNameFlags_None = 0,
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};
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/// \brief Sets the name of an entity.
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/// \param entity The entity to set the name of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param name The new name of the entity.
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/// \pre \li Must not be null.
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/// \pre \li Must not be empty.
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/// \param flags Flags for setting the name of the entity.
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/// \param error_out \see errors.h
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IKA_API void ikarus_entity_set_name(
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IkarusEntity * entity,
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char const * name,
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IkarusEntitySetNameFlags flags,
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IkarusErrorData * error_out
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);
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/// \brief Gets the blueprints an entity is linked to.
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/// \param entity The entity to get the blueprints of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param size_out An out parameter for the number of blueprints in the returned array
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/// or undefined if an error occurs.
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/// \param error_out \see errors.h
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IKA_API struct IkarusBlueprint ** ikarus_entity_get_linked_blueprints(
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IkarusEntity * entity,
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size_t * size_out,
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IkarusErrorData * error_out
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);
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/// \brief Gets the number of blueprints an entity is linked to.
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/// \param entity The entity to get the number of linked blueprints of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param error_out \see errors.h
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/// \return The number of linked blueprints or 0 if an error occurs.
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IKA_API size_t ikarus_entity_get_linked_blueprints_count(
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IkarusEntity * entity,
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IkarusErrorData * error_out
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);
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/// \brief Flags for linking an entity to a blueprint.
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enum IkarusEntityLinkBlueprintFlags {
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/// \brief No flags.
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IkarusEntityLinkBlueprintFlags_None = 0,
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};
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/// \brief Links an entity to a blueprint.
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/// \details An uninitialized (default) value is created for each property of the
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/// blueprint.
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/// \param entity The entity to link the blueprint to.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param blueprint The blueprint to link to.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \pre \li Must be in the same project as the entity.
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/// \remark If the entity is already linked to the blueprint, nothing happens.
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/// \param flags Flags for linking the entity to the blueprint.
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/// \param error_out \see errors.h
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IKA_API void ikarus_entity_link_blueprint(
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IkarusEntity * entity,
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struct IkarusBlueprint * blueprint,
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IkarusEntityLinkBlueprintFlags flags,
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IkarusErrorData * error_out
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);
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/// \brief Flags for unlinking an entity from a blueprint.
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enum IkarusEntityUnlinkBlueprintFlags {
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/// \brief No flags.
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IkarusEntityUnlinkBlueprintFlags_None = 0,
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/// \brief Keep the values associated with the blueprint, transforming them into entity values.
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IkarusEntityUnlinkBlueprintFlags_KeepValues = 1,
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};
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/// \brief Unlinks an entity from a blueprint.
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/// \details All values associated with the blueprint are deleted.
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/// \param entity The entity to unlink the blueprint from.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param blueprint The blueprint to unlink from.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \remark If the entity is not linked to the blueprint, nothing happens.
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/// \param flags Flags for unlinking the entity from the blueprint.
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/// \param error_out \see errors.h
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IKA_API void ikarus_entity_unlink_blueprint(
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IkarusEntity * entity,
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struct IkarusBlueprint * blueprint,
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IkarusEntityUnlinkBlueprintFlags flags,
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IkarusErrorData * error_out
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);
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/// \brief Gets the values of an entity.
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/// \param entity The entity to get the values of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param error_out \see errors.h
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/// \return The values, in json format of or null if an error occurs.
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/// The json representation is an array of objects with the following keys:
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/// - `name`: The name of the value.
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/// - `value`: The value itself. \see value.h
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IKA_API char const *
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ikarus_entity_get_values(IkarusEntity * entity, IkarusErrorData * error_out);
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/// \brief Gets a value of an entity.
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/// \param entity The entity to get the value of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param name The value's name.
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/// \pre \li Must not be null.
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/// \remark Ownership remains with the client.
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/// \param error_out \see errors.h
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/// \return The value, in json format of or null if an error occurs. \see value.h
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IKA_API char const * ikarus_entity_get_value(
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IkarusEntity * entity,
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char const * name,
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IkarusErrorData * error_out
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);
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/// \brief Flags for setting a value of an entity.
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enum IkarusEntitySetValueFlags {
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/// \brief No flags.
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IkarusEntitySetValueFlags_None = 0,
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};
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/// \brief Sets a value of an entity.
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/// \details If no value exists for the name, a new one is created.
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/// Any previous value is overwritten.
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/// \param entity The entity to set the value of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param name The value's name.
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/// \pre \li Must not be null.
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/// \param value The value to set.
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/// \pre \li Must not be null.
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/// \pre \li Must be a valid json representation of a value. \see value.h
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/// \param flags Flags for setting the value.
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/// \param error_out \see errors.h
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IKA_API void ikarus_entity_set_value(
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IkarusEntity * entity,
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char const * name,
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char const * value,
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IkarusEntitySetValueFlags flags,
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IkarusErrorData * error_out
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);
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/// \brief Flags for deleting a value of an entity.
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enum IkarusEntityDeleteValueFlags {
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/// \brief No flags.
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IkarusEntityDeleteValueFlags_None = 0,
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};
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/// \brief Deletes a value of an entity.
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/// \param entity The entity to delete the value of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param name The property's name to delete the value of.
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/// \pre \li Must not be null.
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/// \pre \li Must be the name of a value which exists within the property.
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/// \param flags Flags for deleting the value.
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/// \param error_out \see errors.h
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IKA_API void ikarus_entity_delete_value(
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IkarusEntity * entity,
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char const * name,
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IkarusEntityDeleteValueFlags flags,
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IkarusErrorData * error_out
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);
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/// \brief Gets the property values of an entity.
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/// \param entity The entity to get the property values of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param error_out \see errors.h
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/// \return The property values, in msgpack format of or null if an error occurs.
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/// The format is a map of property pointers (as integers) to values. \see
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/// value.h
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IKA_API char const * ikarus_entity_get_property_values(
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IkarusEntity * entity,
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IkarusErrorData * error_out
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);
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/// \brief Gets the value of a property of an entity.
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/// \param entity The entity to get the value of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param property The property to get the value of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \pre \li Must be linked to the entity.
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/// \param error_out \see errors.h
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/// \return The value, in json format of or null if an error occurs. \see
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/// value.h
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IKA_API char const * ikarus_entity_get_property_value(
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IkarusEntity * entity,
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struct IkarusProperty * property,
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IkarusErrorData * error_out
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);
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/// \brief Flags for setting the value of a property of an entity.
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enum IkarusEntitySetPropertyValueFlags {
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/// \brief No flags.
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IkarusEntitySetPropertyValueFlags_None = 0,
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};
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/// \brief Sets the value of a property of an entity.
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/// \details Any previous value is overwritten.
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/// \param entity The entity to set the value of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \param property The property to set the value of.
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/// \pre \li Must not be null.
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/// \pre \li Must exist.
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/// \pre \li Must be linked to the entity.
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/// \param value The value to set.
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/// \pre \li Must not be null.
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/// \pre \li Must be a valid json representation of a value. \see value.h
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/// \pre \li Must be valid for the property's schema. \see schema.h
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/// \param flags Flags for setting the property value.
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/// \param error_out \see errors.h
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IKA_API void ikarus_entity_set_property_value(
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IkarusEntity * entity,
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struct IkarusProperty * property,
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char const * value,
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IkarusEntitySetPropertyValueFlags flags,
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IkarusErrorData * error_out
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);
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IKARUS_END_HEADER
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/// @}
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