gqty/Client/context.mjs

The No-GraphQL Client for TypeScript

import { Cache } from '../Cache/index.mjs';

const createContext = ({
  aliasLength,
  cache,
  cachePolicy,
  depthLimit,
  scalars,
  schema,
  typeKeys
}) => {
  const disposeSubscriptions = /* @__PURE__ */ new Set();
  const selectSubscriptions = /* @__PURE__ */ new Set();
  return {
    aliasLength,
    cache: cachePolicy === "no-cache" || cachePolicy === "no-store" || cachePolicy === "reload" ? new Cache(void 0, { maxAge: 0 }) : cache,
    cacheOptions: {
      includeExpired: cachePolicy === "default" || cachePolicy === "force-cache" || cachePolicy === "only-if-cached"
    },
    scalars,
    schema,
    depthLimit,
    hasCacheHit: false,
    hasCacheMiss: false,
    shouldFetch: false,
    notifyCacheUpdate: cachePolicy !== "default",
    select(selection, cacheNode) {
      const now = Date.now();
      const { data, expiresAt: age = Infinity } = cacheNode != null ? cacheNode : {};
      if (cacheNode) {
        this.shouldFetch || (this.shouldFetch = data === void 0 || // Add 100 ms leeway to avoiding infinite fetch loops for caches with
        // immedidate staleness.
        age < now);
        this.hasCacheHit || (this.hasCacheHit = data !== void 0);
        this.notifyCacheUpdate || (this.notifyCacheUpdate = data === void 0);
      }
      this.hasCacheMiss || (this.hasCacheMiss = (cacheNode == null ? void 0 : cacheNode.data) === void 0);
      selectSubscriptions.forEach((fn) => fn(selection, cacheNode));
    },
    reset() {
      this.shouldFetch = false;
      this.hasCacheHit = false;
      this.hasCacheMiss = false;
      this.notifyCacheUpdate = cachePolicy !== "default";
    },
    subscribeSelect(callback) {
      selectSubscriptions.add(callback);
      return () => {
        selectSubscriptions.delete(callback);
      };
    },
    dispose() {
      disposeSubscriptions.forEach((fn) => fn());
      disposeSubscriptions.clear();
      selectSubscriptions.clear();
    },
    subscribeDispose(callback) {
      disposeSubscriptions.add(callback);
      return () => {
        disposeSubscriptions.delete(callback);
      };
    },
    typeKeys
  };
};

export { createContext };