1 files changed, 32 insertions, 0 deletions
diff --git a/packages/integrations/preact/src/context.ts b/packages/integrations/preact/src/context.ts
new file mode 100644
index 000000000..4d2398d28
--- /dev/null
+++ b/packages/integrations/preact/src/context.ts
@@ -0,0 +1,32 @@
+import type { PropNameToSignalMap, RendererContext, SignalLike } from './types.js';
+
+export type Context = {
+	id: string;
+	c: number;
+	signals: Map<SignalLike, string>;
+	propsToSignals: Map<Record<string, any>, PropNameToSignalMap>;
+};
+
+const contexts = new WeakMap<RendererContext['result'], Context>();
+
+export function getContext(result: RendererContext['result']): Context {
+	if (contexts.has(result)) {
+		return contexts.get(result)!;
+	}
+	let ctx = {
+		c: 0,
+		get id() {
+			return 'p' + this.c.toString();
+		},
+		signals: new Map(),
+		propsToSignals: new Map(),
+	};
+	contexts.set(result, ctx);
+	return ctx;
+}
+
+export function incrementId(ctx: Context): string {
+	let id = ctx.id;
+	ctx.c++;
+	return id;
+}