Merge pull request #286 from leonyjiang/tma660-recently-searched-categories

[TMA-660] Recently Searched Categories

1 files changed, 36 insertions, 0 deletions

diff --git a/src/utils/users.ts b/src/utils/users.ts
index 653c941e..15107c99 100644
--- a/src/utils/users.ts
+++ b/src/utils/users.ts
@@ -19,6 +19,7 @@ import {AppDispatch} from './../store/configureStore';
 import {RootState} from './../store/rootReducer';
 import {
   ProfilePreviewType,
+  CategoryPreviewType,
   ProfileType,
   ScreenType,
   UserType,
@@ -196,3 +197,38 @@ export const addUserToRecentlyViewed = async (user: ProfilePreviewType) => {
     console.log(e);
   }
 };
+
+/*
+ * Stores `category` in AsyncStorage as a recently searched category.
+ */
+export const addCategoryToRecentlySearched = async (
+  category: CategoryPreviewType,
+) => {
+  const recentlySearchedCategoriesKey = '@recently_searched_categories';
+  let categories: CategoryPreviewType[];
+  // retrieve recently-searched categories and set new list
+  try {
+    const categoriesJSON = await AsyncStorage.getItem(
+      recentlySearchedCategoriesKey,
+    );
+    if (categoriesJSON) {
+      categories = JSON.parse(categoriesJSON);
+      // TODO: make this more efficient by comparing shorter key
+      if (categories.find((c) => c.name === category.name)) return;
+      categories.push(category);
+    } else {
+      categories = [category];
+    }
+    // store updated list of recently-searched categories
+    try {
+      AsyncStorage.setItem(
+        recentlySearchedCategoriesKey,
+        JSON.stringify(categories),
+      );
+    } catch (e) {
+      console.log(e);
+    }
+  } catch (e) {
+    console.log(e);
+  }
+};