gqty/Accessor/index.mjs

The No-GraphQL Client for TypeScript

import { GQtyError } from '../Error/index.mjs';
import { Selection } from '../Selection.mjs';
import { $meta } from './meta.mjs';
export { $meta } from './meta.mjs';
import { createObjectAccessor } from './resolve.mjs';

function createSchemaAccessor(context) {
  const selectionCache = /* @__PURE__ */ new Map();
  return {
    accessor: new Proxy(
      {
        query: { __typename: "Query" },
        mutation: { __typename: "Mutation" },
        subscription: { __typename: "Subscription" }
      },
      {
        get(target, key) {
          var _a;
          if (key === "toJSON") {
            return () => context.cache.toJSON();
          }
          if (!Reflect.has(target, key) || !Reflect.get(
            target[key],
            "__typename"
          ) || !context.schema[key])
            return;
          const selection = (_a = selectionCache.get(key)) != null ? _a : Selection.createRoot(key, { aliasLength: context.aliasLength });
          selectionCache.set(key, selection);
          return createObjectAccessor({
            context,
            cache: {
              data: target[key],
              expiresAt: Infinity
            },
            selection,
            type: { __type: key }
          });
        }
      }
    ),
    clearCache: () => {
      selectionCache.clear();
    }
  };
}
const setCache = (accessor, data) => {
  var _a, _b;
  const meta = $meta(accessor);
  if (!meta) {
    throw new GQtyError(`Subject must be an accessor.`);
  }
  data = (_b = (_a = $meta(data)) == null ? void 0 : _a.cache.data) != null ? _b : data;
  if (!data || typeof data !== "object") {
    throw new GQtyError(
      `Data must be a subset of the schema object, got type: ${typeof data}.`
    );
  }
  meta.cache.data = data;
  Object.assign(accessor, data);
};
const assignSelections = (source, target) => {
  var _a;
  if (source === null || target === null) return;
  if ($meta(source) === void 0) {
    throw new GQtyError(`Invalid source proxy`);
  }
  if ($meta(target) === void 0) {
    throw new GQtyError(`Invalid target proxy`);
  }
  const sourceSelection = (_a = $meta(source)) == null ? void 0 : _a.selection;
  if (!sourceSelection) return;
  if (sourceSelection.children.size === 0) {
    if (process.env.NODE_ENV !== "production") {
      console.warn("Source proxy doesn't have any selections made");
    }
  }
  const stack = new Set(sourceSelection.children.values());
  for (const it of stack) {
    if (it.children.size === 0) {
      let currentNode;
      for (const selection of it.ancestry) {
        if (currentNode === void 0) {
          if (selection !== sourceSelection) continue;
          currentNode = target;
        } else {
          const node = currentNode[selection.key];
          if (selection.input) {
            if (typeof node !== "function") {
              throw new GQtyError(
                `Unexpected inputs for selection: ${selection}`
              );
            }
            currentNode = node(selection.input);
          } else {
            currentNode = node;
          }
        }
      }
    } else {
      for (const [, child] of it.children) {
        stack.add(child);
      }
    }
  }
};

export { assignSelections, createSchemaAccessor, setCache };