Add shared instance metadata context

packages/ui/src/lib/contexts/instance-metadata-context.tsx

@@ -0,0 +1,72 @@
+import { Component, JSX, createContext, createEffect, createMemo, createSignal, useContext, type Accessor } from "solid-js"
+import type { Instance } from "../../types/instance"
+import { instances } from "../../stores/instances"
+import { loadInstanceMetadata, hasMetadataLoaded } from "../hooks/use-instance-metadata"
+
+interface InstanceMetadataContextValue {
+  isLoading: Accessor<boolean>
+  instance: Accessor<Instance>
+  metadata: Accessor<Instance["metadata"] | undefined>
+  refreshMetadata: () => Promise<void>
+}
+
+const InstanceMetadataContext = createContext<InstanceMetadataContextValue | null>(null)
+
+interface InstanceMetadataProviderProps {
+  instance: Instance
+  children: JSX.Element
+}
+
+export const InstanceMetadataProvider: Component<InstanceMetadataProviderProps> = (props) => {
+  const resolvedInstance = createMemo(() => instances().get(props.instance.id) ?? props.instance)
+  const [isLoading, setIsLoading] = createSignal(true)
+
+  const ensureMetadata = async (force = false) => {
+    const current = resolvedInstance()
+    if (!current) {
+      setIsLoading(false)
+      return
+    }
+
+    if (!force && hasMetadataLoaded(current.metadata)) {
+      setIsLoading(false)
+      return
+    }
+
+    setIsLoading(true)
+    await loadInstanceMetadata(current, { force })
+    setIsLoading(false)
+  }
+
+  createEffect(() => {
+    const current = resolvedInstance()
+    // Ensure metadata becomes a dependency so we re-check when store updates
+    void current?.metadata
+    void ensureMetadata()
+  })
+
+  const contextValue: InstanceMetadataContextValue = {
+    isLoading,
+    instance: resolvedInstance,
+    metadata: () => resolvedInstance().metadata,
+    refreshMetadata: () => ensureMetadata(true),
+  }
+
+  return (
+    <InstanceMetadataContext.Provider value={contextValue}>
+      {props.children}
+    </InstanceMetadataContext.Provider>
+  )
+}
+
+export function useInstanceMetadataContext(): InstanceMetadataContextValue {
+  const ctx = useContext(InstanceMetadataContext)
+  if (!ctx) {
+    throw new Error("useInstanceMetadataContext must be used within InstanceMetadataProvider")
+  }
+  return ctx
+}
+
+export function useOptionalInstanceMetadataContext(): InstanceMetadataContextValue | null {
+  return useContext(InstanceMetadataContext)
+}