feat(vue): add Vue 3 integration composable and provider (#68)

packages/vue/src/context.ts

@@ -0,0 +1,70 @@
+import { computed, defineComponent, inject, provide, ref, type ComputedRef, type InjectionKey } from "vue";
+import { createAbbyInstance, type AbbyConfig, type AbbyInstance, type ABConfig, defineConfig } from "@tryabby/core";
+
+export { type ABConfig, type AbbyConfig, defineConfig };
+
+export interface ABTestReturnValue<V extends string> {
+  variant: ComputedRef<V>;
+  onAct: () => Promise<void> | void;
+}
+
+export function createAbby<TConfig extends AbbyConfig>(config: TConfig) {
+  const instance: AbbyInstance<TConfig> = createAbbyInstance(config);
+  const AbbyKey: InjectionKey<AbbyInstance<TConfig>> = Symbol("AbbyContext");
+  const version = ref(0);
+  instance.__subscribe?.(() => {
+    version.value += 1;
+  });
+
+  const AbbyProvider = defineComponent({
+    name: "AbbyProvider",
+    setup(_, { slots }) {
+      provide(AbbyKey, instance);
+      return () => slots.default?.();
+    },
+  });
+
+  function useInstance(): AbbyInstance<TConfig> {
+    return inject(AbbyKey, instance);
+  }
+
+  function useAbby<TTest extends keyof TConfig["tests"] & string>(
+    testName: TTest
+  ): ABTestReturnValue<TConfig["tests"][TTest]["variants"][number]> {
+    const abby = useInstance();
+    const variant = computed(() => {
+      void version.value;
+      return abby.getVariant(testName);
+    });
+    return {
+      variant,
+      onAct: () => abby.onAct(testName),
+    };
+  }
+
+  function useFeatureFlag<TFlag extends TConfig["flags"][number] & string>(flagName: TFlag): ComputedRef<boolean> {
+    const abby = useInstance();
+    return computed(() => {
+      void version.value;
+      return Boolean(abby.getFeatureFlag(flagName));
+    });
+  }
+
+  function useRemoteConfig<TKey extends keyof NonNullable<TConfig["remoteConfig"]> & string>(
+    key: TKey
+  ): ComputedRef<unknown> {
+    const abby = useInstance();
+    return computed(() => {
+      void version.value;
+      return abby.getRemoteConfig(key);
+    });
+  }
+
+  return {
+    AbbyProvider,
+    useAbby,
+    useFeatureFlag,
+    useRemoteConfig,
+    instance,
+  };
+}