inital support for hooks...

Currently the following hooks are available:
 - WinMapPre
 - WinMapPost

src/lua/hook.zig

@@ -0,0 +1,81 @@
+const Hook = @This();
+
+const std = @import("std");
+
+const THook = @import("../types/hook.zig");
+
+const zlua = @import("zlua");
+
+const gpa = std.heap.c_allocator;
+const server = &@import("../main.zig").server;
+
+pub fn add_hook(L: *zlua.Lua) i32 {
+  L.checkType(2, .table);
+
+  var hook: *THook = gpa.create(THook) catch {
+    L.raiseErrorStr("Lua error check your config", .{});
+    return 0;
+  };
+  hook.events = std.ArrayList([]const u8).initCapacity(gpa, 1) catch {
+    L.raiseErrorStr("Lua error check your config", .{});
+    return 0;
+  };
+
+  // We support both a string and a table of strings as the first value of
+  // add_hook. Regardless of which type is passed in we create an arraylist of
+  // []const u8's
+  if (L.isTable(1)) {
+    L.pushNil();
+    while (L.next(1)) {
+      if (L.isString(-1)) {
+        const s = L.toString(-1) catch {
+          L.raiseErrorStr("Lua error check your config", .{});
+          return 0;
+        };
+        hook.events.append(gpa, s) catch {
+          L.raiseErrorStr("Lua error check your config", .{});
+          return 0;
+        };
+      }
+      L.pop(1);
+    }
+  } else if (L.isString(1)) {
+    const s = L.toString(1) catch {
+      L.raiseErrorStr("Lua error check your config", .{});
+      return 0;
+    };
+    hook.events.append(gpa, s) catch {
+      L.raiseErrorStr("Lua error check your config", .{});
+      return 0;
+    };
+  }
+
+  _ = L.pushString("callback");
+  _ = L.getTable(2);
+  if (L.isFunction(-1)) {
+    hook.options.lua_cb_ref_idx = L.ref(zlua.registry_index) catch {
+      L.raiseErrorStr("Lua error check your config", .{});
+      return 0;
+    };
+  }
+
+  server.hooks.append(gpa, hook) catch {
+    L.raiseErrorStr("Lua error check your config", .{});
+    return 0;
+  };
+
+  for (hook.events.items) |value| {
+    server.events.put(value, hook) catch {
+      L.raiseErrorStr("Lua error check your config", .{});
+      return 0;
+    };
+  }
+
+  return 0;
+}
+
+pub fn del_hook(L: *zlua.Lua) i32 {
+  // TODO: impl
+  _ = L;
+  return 0;
+}

src/lua/lua.zig

@@ -8,6 +8,7 @@ const Bridge = @import("bridge.zig");
 const Fs = @import("fs.zig");
 const Input = @import("input.zig");
 const Api = @import("api.zig");
+const Hook = @import("hook.zig");
 
 const gpa = std.heap.c_allocator;
 
@@ -64,6 +65,11 @@ pub fn init(self: *Lua) !void {
       self.state.newLib(input_funcs);
       self.state.setField(-2, "input");
     }
+    {
+      const hook_funcs = zlua.fnRegsFromType(Hook);
+      self.state.newLib(hook_funcs);
+      self.state.setField(-2, "hook");
+    }
     {
       const api_funcs = zlua.fnRegsFromType(Api);
       self.state.newLib(api_funcs);