1 files changed, 111 insertions, 0 deletions
diff --git a/packages/web-util/src/components/utils.ts b/packages/web-util/src/components/utils.ts
new file mode 100644
index 000000000..75c3fc0fe
--- /dev/null
+++ b/packages/web-util/src/components/utils.ts
@@ -0,0 +1,111 @@
+import { createElement, VNode } from "preact";
+
+export type StateFunc<S> = (p: S) => VNode;
+
+export type StateViewMap<StateType extends { status: string }> = {
+  [S in StateType as S["status"]]: StateFunc<S>;
+};
+
+export type RecursiveState<S extends object> = S | (() => RecursiveState<S>);
+
+export function compose<SType extends { status: string }, PType>(
+  hook: (p: PType) => RecursiveState<SType>,
+  viewMap: StateViewMap<SType>,
+): (p: PType) => VNode {
+
+  function withHook(stateHook: () => RecursiveState<SType>): () => VNode {
+    function ComposedComponent(): VNode {
+      const state = stateHook();
+
+      if (typeof state === "function") {
+        const subComponent = withHook(state);
+        return createElement(subComponent, {});
+      }
+
+      const statusName = state.status as unknown as SType["status"];
+      const viewComponent = viewMap[statusName] as unknown as StateFunc<SType>;
+      return createElement(viewComponent, state);
+    }
+
+    return ComposedComponent;
+  }
+
+  return (p: PType) => {
+    const h = withHook(() => hook(p));
+    return h();
+  };
+}
+
+export function recursive<PType>(
+  hook: (p: PType) => RecursiveState<VNode>,
+): (p: PType) => VNode {
+
+  function withHook(stateHook: () => RecursiveState<VNode>): () => VNode {
+    function ComposedComponent(): VNode {
+      const state = stateHook();
+
+      if (typeof state === "function") {
+        const subComponent = withHook(state);
+        return createElement(subComponent, {});
+      }
+
+      return state;
+    }
+
+    return ComposedComponent;
+  }
+
+  return (p: PType) => {
+    const h = withHook(() => hook(p));
+    return h();
+  };
+}
+
+
+
+/**
+ *
+ * @param obj VNode
+ * @returns
+ */
+export function saveVNodeForInspection<T>(obj: T): T {
+  // @ts-ignore
+  window["showVNodeInfo"] = function showVNodeInfo() {
+    inspect(obj);
+  };
+  return obj;
+}
+function inspect(obj: any) {
+  if (!obj) return;
+  if (obj.__c && obj.__c.__H) {
+    const componentName = obj.__c.constructor.name;
+    const hookState = obj.__c.__H;
+    const stateList = hookState.__ as Array<any>;
+    console.log("==============", componentName);
+    stateList.forEach((hook) => {
+      const { __: value, c: context, __h: factory, __H: args } = hook;
+      if (typeof context !== "undefined") {
+        const { __c: contextId } = context;
+        console.log("context:", contextId, hook);
+      } else if (typeof factory === "function") {
+        console.log("memo:", value, "deps:", args);
+      } else if (typeof value === "function") {
+        const effectName = value.name;
+        console.log("effect:", effectName, "deps:", args);
+      } else if (typeof value.current !== "undefined") {
+        const ref = value.current;
+        console.log("ref:", ref instanceof Element ? ref.outerHTML : ref);
+      } else if (value instanceof Array) {
+        console.log("state:", value[0]);
+      } else {
+        console.log(hook);
+      }
+    });
+  }
+  const children = obj.__k;
+  if (children instanceof Array) {
+    children.forEach((e) => inspect(e));
+  } else {
+    inspect(children);
+  }
+}