1 files changed, 65 insertions, 0 deletions
diff --git a/runtime/rt/40_permissions.js b/runtime/rt/40_permissions.js
new file mode 100644
index 000000000..50d471b6a
--- /dev/null
+++ b/runtime/rt/40_permissions.js
@@ -0,0 +1,65 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+((window) => {
+  const core = window.Deno.core;
+  const { illegalConstructorKey } = window.__bootstrap.webUtil;
+
+  function opQuery(desc) {
+    return core.jsonOpSync("op_query_permission", desc).state;
+  }
+
+  function opRevoke(desc) {
+    return core.jsonOpSync("op_revoke_permission", desc).state;
+  }
+
+  function opRequest(desc) {
+    return core.jsonOpSync("op_request_permission", desc).state;
+  }
+
+  class PermissionStatus {
+    constructor(state = null, key = null) {
+      if (key != illegalConstructorKey) {
+        throw new TypeError("Illegal constructor.");
+      }
+      this.state = state;
+    }
+    // TODO(kt3k): implement onchange handler
+  }
+
+  class Permissions {
+    constructor(key) {
+      if (key != illegalConstructorKey) {
+        throw new TypeError("Illegal constructor.");
+      }
+    }
+
+    query(desc) {
+      const state = opQuery(desc);
+      return Promise.resolve(
+        new PermissionStatus(state, illegalConstructorKey),
+      );
+    }
+
+    revoke(desc) {
+      const state = opRevoke(desc);
+      return Promise.resolve(
+        new PermissionStatus(state, illegalConstructorKey),
+      );
+    }
+
+    request(desc) {
+      const state = opRequest(desc);
+      return Promise.resolve(
+        new PermissionStatus(state, illegalConstructorKey),
+      );
+    }
+  }
+
+  const permissions = new Permissions(illegalConstructorKey);
+
+  window.__bootstrap.permissions = {
+    permissions,
+    Permissions,
+    PermissionStatus,
+  };
+})(this);