@firestore-emulator/server/dist/FirestoreState/mask.mjs

This package is the implementation of the Firestore emulator. It is a Node.js

// src/FirestoreState/mask.ts
import { produce } from "immer";

// src/FirestoreState/field.ts
import { NullValue } from "@firestore-emulator/proto/dist/google/protobuf/struct";
var FirestoreStateDocumentMapField = class _FirestoreStateDocumentMapField {
  constructor(value) {
    this.value = value;
  }
  type = "map_value";
  toJSON() {
    return {
      type: this.type,
      value: Object.fromEntries(
        Object.entries(this.value).map(([k, v]) => [k, v.toJSON()])
      )
    };
  }
  toV1ValueObject() {
    return {
      map_value: {
        fields: Object.fromEntries(
          Object.entries(this.value).map(([k, v]) => [k, v.toV1ValueObject()])
        )
      }
    };
  }
  eq(other) {
    return other instanceof _FirestoreStateDocumentMapField && Object.keys(this.value).length === Object.keys(other.value).length && Object.entries(this.value).every(([k, v]) => {
      const item = other.value[k];
      if (!item) return false;
      return item.eq(v);
    });
  }
  lt(_other) {
    return false;
  }
  lte(_other) {
    return false;
  }
  gt(_other) {
    return false;
  }
  gte(_other) {
    return false;
  }
};

// src/FirestoreState/mask.ts
function escapeKey(key) {
  return key.includes(".") ? `\`${key}\`` : key;
}
function getNestedUpdateMask(updateMask, key) {
  const escapedKey = escapeKey(key);
  return updateMask.filter((m) => m.startsWith(`${escapedKey}.`)).map((m) => m.substring(escapedKey.length + 1));
}
function isUpdatable(updateMask, key) {
  return updateMask.length === 0 || updateMask.includes(escapeKey(key));
}
function updateFields(current, fields, updateMask) {
  return produce(current, (draft) => {
    for (const [key, field] of Object.entries(fields)) {
      const updatable = isUpdatable(updateMask, key);
      const nestedUpdateMask = getNestedUpdateMask(updateMask, key);
      if (updatable) {
        draft[key] = field;
      } else if (field.type === "map_value" && (draft[key] == null || draft[key].type === "map_value")) {
        draft[key] = new FirestoreStateDocumentMapField(
          updateFields(draft[key]?.value ?? {}, field.value, nestedUpdateMask)
        );
      }
    }
  });
}
export {
  updateFields
};
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