1 files changed, 52 insertions, 0 deletions
diff --git a/src/main/java/me/lucko/fabric/api/permissions/v0/PermissionCheckEvent.java b/src/main/java/me/lucko/fabric/api/permissions/v0/PermissionCheckEvent.java
new file mode 100644
index 0000000..42b5b63
--- /dev/null
+++ b/src/main/java/me/lucko/fabric/api/permissions/v0/PermissionCheckEvent.java
@@ -0,0 +1,52 @@
+/*
+ * This file is part of fabric-permissions-api, licensed under the MIT License.
+ *
+ *  Copyright (c) lucko (Luck) <[email protected]>
+ *  Copyright (c) contributors
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to deal
+ *  in the Software without restriction, including without limitation the rights
+ *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *  copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in all
+ *  copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *  SOFTWARE.
+ */
+
+package me.lucko.fabric.api.permissions.v0;
+
+import net.fabricmc.fabric.api.event.Event;
+import net.fabricmc.fabric.api.event.EventFactory;
+import net.fabricmc.fabric.api.util.TriState;
+import net.minecraft.command.CommandSource;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Simple permissions check event for {@link CommandSource}s.
+ */
+public interface PermissionCheckEvent {
+
+    Event<PermissionCheckEvent> EVENT = EventFactory.createArrayBacked(PermissionCheckEvent.class, (callbacks) -> (source, permission) -> {
+        for (PermissionCheckEvent callback : callbacks) {
+            TriState state = callback.onPermissionCheck(source, permission);
+            if (state != TriState.DEFAULT) {
+                return state;
+            }
+        }
+        return TriState.DEFAULT;
+    });
+
+    @NotNull TriState onPermissionCheck(@NotNull CommandSource source, @NotNull String permission);
+
+}