1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
#
# lkn.core: an entity-component-system (ecs) implementation for lyxan
# Copyright (C) 2017 Thomas Letan <contact@thomasletan.fr>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
alias Lkn.Core.Specs
defmodule Lkn.Core.Component do
defp cast_client(module_name, cast) do
name = cast.fun.name
entity_key_type = quote do
Lkn.Core.Entity.k
end
cast_doc = if cast.doc != :none do
quote do
@doc unquote(cast.doc)
end
end
arglist = Enum.map(cast.fun.arguments, &(&1.name))
arglistcl = [{:entity_key, [], nil}|arglist]
argtypes = [entity_key_type|Enum.map(cast.fun.arguments, &(&1.type))]
quote do
unquote(cast_doc)
@spec unquote({name, [], argtypes}) :: :ok
def unquote({name, [], arglistcl}) do
GenServer.cast(Lkn.Core.Name.component(unquote({:entity_key, [], nil}), unquote(module_name)),
{:spec, {unquote(name), unquote(arglist)}})
end
end
end
defp call_client(module_name, call) do
name = call.fun.name
entity_key_type = quote do
Lkn.Core.Entity.k
end
call_doc = if call.doc != :none do
quote do
@doc unquote(call.doc)
end
end
arglist = Enum.map(call.fun.arguments, &(&1.name))
arglistcl = [{:entity_key, [], nil}|arglist]
argtypes = [entity_key_type|Enum.map(call.fun.arguments, &(&1.type))]
quote do
unquote(call_doc)
@spec unquote({name, [], argtypes}) :: unquote(call.ret)
def unquote({name, [], arglistcl}) do
GenServer.call(Lkn.Core.Name.component(unquote({:entity_key, [], nil}), unquote(module_name)),
{:spec, {unquote(name), unquote(arglist)}})
end
end
end
defp cast_behaviour(cast) do
name = cast.fun.name
entity_key_type = quote do
Lkn.Core.Entity.k
end
arglistcl = [{:::, [], [{:entity_key, [], nil}, entity_key_type]}
|Enum.map(cast.fun.arguments, &({:::, [], [&1.name, &1.type]}))]
quote do
@callback unquote({name, [], arglistcl}) :: :ok
end
end
defp call_behaviour(call) do
name = call.fun.name
entity_key_type = quote do
Lkn.Core.Entity.k
end
arglistcl = [{:::, [], [{:entity_key, [], nil}, entity_key_type]}
|Enum.map(call.fun.arguments, &({:::, [], [&1.name, &1.type]}))]
quote do
@callback unquote({name, [], arglistcl}) :: unquote(call.ret)
end
end
defmacro defcomponent(name, do: block) do
block = case block do
{:__block__, _, x} -> x
x -> [x]
end
{casts, calls, legit} = Specs.parse_specs(block, [], [], [])
casts_client = Enum.map(casts, &(cast_client(name, &1)))
calls_client = Enum.map(calls, &(call_client(name, &1)))
casts_behaviour = Enum.map(casts, &(cast_behaviour(&1)))
calls_behaviour = Enum.map(calls, &(call_behaviour(&1)))
quote do
defmodule unquote(name) do
unquote(legit)
unquote(casts_client)
unquote(calls_client)
unquote(casts_behaviour)
unquote(calls_behaviour)
def system do
@system
end
defmacro __using__(_) do
quote do
@behaviour unquote(__MODULE__)
use GenServer
alias Lkn.Core.Entity
alias Lkn.Core.Name
alias Lkn.Core.Properties
def specs do
unquote(__MODULE__)
end
@spec start_link(Entity.k) :: GenServer.on_start
def start_link(entity_key) do
GenServer.start_link(__MODULE__, entity_key, name: Name.component(entity_key, unquote(__MODULE__)))
end
@spec read(Entity.k, Properties.prop) :: Option.t(Properties.value)
defp read(entity_key, p) do
Properties.read(entity_key, p)
end
@spec write(Entity.k, Properties.prop, Properties.value) :: :ok
def write(entity_key, p, v) do
Properties.write(entity_key, p, v)
end
def handle_cast({:spec, {name, args}}, entity_key) do
:erlang.apply(__MODULE__, name, [entity_key|args])
{:noreply, entity_key}
end
def handle_call({:spec, {name, args}}, _call, entity_key) do
res = :erlang.apply(__MODULE__, name, [entity_key|args])
{:reply, res, entity_key}
end
end
end
end
end
end
end
|