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#
# francy: Interactive Discrete Mathematics in GAP
#
#! @Chapter Francy Core
#!
#! Francy is responsible for generating JSON metadata models allowing external
#! tools / libraries / frameworks to add visual representations to math structures.
#! This JSON model representation defines the contract between this package (server)
#! and a GUI framework (client), enabling complete SoC (Separation of Concerns).
#! Francy can be used to provide graphical interactive environments on existing
#! GAP packages.
#! <P/>
#! A JSON schema is available and can be used to produce compliant clients for this package.
#! **See schema/francy.json**
#! <P/>
#! To map required and optional attributes from the schema into GAP code, the implementation follows the following criteria:
#! - Object creation requests mandatory attributes, i.e. required with no default value, e.g. canvas:=Canvas("Title")
#! - Object creation accepts an object of defaults, i.e. default values for mandatory fields but that might repeat throughout the creation of multiple similar objects, e.g. defaults:=DefaultCanvas; defaults!.zoomToFit:=false; canvas:=Canvas("Title",defaults); Where DefaultCanvas contains defaults for width (800) and height (600)
#! - Attributes associated with the object that can be set, .i.e. optional with no defaults, e.g. canvas:=Canvas("Title"); SetTexTypesetting(canvas,true);
#! The API follows common GAP naming conventions and adding objects is done using Add(objectHolder,object) and removing object is done using Remove(objectHolder,object).
#! <P/>
#! Although Francy has the concept of a <C>Graph</C>, it does not implement any Mathematics Graphs Theory.
#! <P/>
#! Please see Francy-JS for client implementation.
#! @Section Categories
#! In this section we show all Francy Core Categories.
#! @Description
#! Identifies all <C>Objects</C> in Francy.
DeclareCategory("IsFrancyObject", IsObject);
#! @Description
#! Identifies all Default record objects in Francy.
DeclareCategory("IsFrancyDefaultObject", IsObject);
#! @Description
#! Identifies all Type record objects in Francy.
DeclareCategory("IsFrancyTypeObject", IsObject);
#! @Section Families
#! In this section we show all Francy Core Families.
#! @Description
#! This Family identifies all objects of this package
#! @Returns <C>FrancyFamily<C>
BindGlobal("FrancyFamily", NewFamily("FrancyFamily", IsFrancyObject));
#! @Section Global
#! In this section we show all Francy Core Types
#! @Description
#! Specifies the content-type mime of this package.
#! A MIME type stands for "Multipurpose Internet Mail Extensions" and it is a standard to identify a document on the internet.
#! <P/>
#! Using this mime, the client should be able to know how to render the JSON Metadata Model.
#! @Returns <C>IsString</C> with content 'application/vnd.francy+json'
BindGlobal("FrancyMIMEType", "application/vnd.francy+json");
#! @Section Attributes
#! In this section we show all Francy Core Attributes
#! @Description
#! All Objects created in Francy have a generated unique identifier.
#! @Returns <C>IsString</C> with the unique identifier of the object
DeclareAttribute("FrancyId", IsFrancyObject);
#! @Description
#! Prints the object unique identifier.
#! @Returns a <C>IsString</C> with the unique id of the object
InstallOtherMethod(FrancyId, "francyObject", [IsFrancyObject], o -> o!.id);
#! @Description
#! Use with care! Changing the unique ID might be useful in certain cases,
#! but bear in mind it might cause unexpected behavior. Use at your own risk.
InstallOtherMethod(SetFrancyId, "francyObject, string", [IsFrancyObject, IsString], function(o, s) o!.id := s; end);
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