cass.cityboundforest.com
A framework for the Godot engine to create TTRPG games for Advanced 5th Edition, Pathfinder 2nd Edition, and more
Moving to Rust, MessagePack, and WASM
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.gitignore
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.gitignore
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# Created by https://www.toptal.com/developers/gitignore/api/lua
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# Edit at https://www.toptal.com/developers/gitignore?templates=lua
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### Lua ###
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# Compiled Lua sources
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luac.out
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# luarocks build files
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*.src.rock
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*.zip
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*.tar.gz
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# Object files
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*.o
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*.os
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*.ko
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*.obj
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*.elf
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# Precompiled Headers
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*.gch
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*.pch
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# Libraries
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*.lib
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*.a
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*.la
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*.lo
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*.def
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*.exp
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# Shared objects (inc. Windows DLLs)
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*.dll
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*.so
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*.so.*
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*.dylib
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# Executables
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*.exe
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*.out
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*.app
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*.i*86
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*.x86_64
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*.hex
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# End of https://www.toptal.com/developers/gitignore/api/lua
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# Created by https://www.toptal.com/developers/gitignore/api/rust
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# Edit at https://www.toptal.com/developers/gitignore?templates=rust
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### Rust ###
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# Generated by Cargo
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# will have compiled files and executables
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debug/
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target/
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# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
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# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
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Cargo.lock
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# These are backup files generated by rustfmt
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**/*.rs.bk
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# MSVC Windows builds of rustc generate these, which store debugging information
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*.pdb
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# End of https://www.toptal.com/developers/gitignore/api/rust
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.gitmodules
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.gitmodules
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README.md
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README.md
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## Usage
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You can, of course, just use this as a usual Lua program. The code assumes you load the class file, call it, and assign the resulting function returned to a global variable `class`. You can then load the `hooks` file, along with any other libraries you'd like (i.e. the different systems). Due to the nature of this framework, I will not be writing code to load a system's code, but it shouldn't be too difficult to do so.
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After loading everything, call the following code:
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```lua
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Hooks:emit("init")
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```
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This will call every function callback under the `init` event.
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class.lua
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class.lua
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-- class.lua
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-- Compatible with Lua 5.1 (not 5.0).
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function class(base, init)
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local c = {} -- a new class instance
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if not init and type(base) == 'function' then
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init = base
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base = nil
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elseif type(base) == 'table' then
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-- our new class is a shallow copy of the base class!
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for i,v in pairs(base) do
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c[i] = v
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end
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c._base = base
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end
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-- the class will be the metatable for all its objects,
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-- and they will look up their methods in it.
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c.__index = c
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-- expose a constructor which can be called by <classname>(<args>)
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local mt = {}
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mt.__call = function(class_tbl, ...)
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local obj = {}
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setmetatable(obj,c)
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if init then
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init(obj,...)
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else
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-- make sure that any stuff from the base class is initialized!
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if base and base.init then
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base.init(obj, ...)
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end
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end
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return obj
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end
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c.init = init
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c.is_a = function(self, klass)
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local m = getmetatable(self)
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while m do
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if m == klass then return true end
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m = m._base
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end
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return false
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end
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setmetatable(c, mt)
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return c
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end
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return class
···
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hooks.lua
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hooks.lua
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hooks = class(function(self)
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self.events = {}
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end)
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function hooks:on(event, callback)
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if not self.events[event] then
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self.events[event] = {}
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end
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table.insert(self.events[event], callback)
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end
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function hooks:once(event, callback)
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local wrapper
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wrapper = function(...)
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callback(...)
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self:off(event, wrapper)
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end
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self:on(event, wrapper)
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end
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function hooks:off(event, callback)
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local list = self.events[event]
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if not list then return end
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for i, cb in ipairs(list) do
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if cb == callback then
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table.remove(list, i)
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return
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end
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end
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end
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function hooks:emit(event, ...)
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local list = self.events[event]
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if not list then return end
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for _, cb in ipairs(list) do
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cb(...)
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end
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end
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local Hooks = hooks()
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return Hooks
···