Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 | /** * Wishlist Selectors * * Memoized selectors for wishlist state. * Uses createSelector for efficient re-render prevention. */ import { createSelector } from '@reduxjs/toolkit'; import type { RootState } from '../store'; import type { WishListItem } from '../features/wishlistSlice'; // ============================================================================ // BASE SELECTORS // ============================================================================ /** * Select the entire wishlist state */ export const selectWishlistState = (state: RootState) => state.wishlistReducer; /** * Select all wishlist items */ export const selectWishlistItems = (state: RootState) => state.wishlistReducer?.items ?? []; /** * Select wishlist loading state */ export const selectWishlistLoading = (state: RootState) => state.wishlistReducer?.loading ?? false; /** * Select wishlist error */ export const selectWishlistError = (state: RootState) => state.wishlistReducer?.error ?? null; /** * Select if wishlist has been loaded */ export const selectIsWishlistLoaded = (state: RootState) => state.wishlistReducer?.isLoaded ?? false; // ============================================================================ // MEMOIZED DERIVED SELECTORS // ============================================================================ /** * Select total number of items in wishlist */ export const selectWishlistItemCount = createSelector( [selectWishlistItems], (items) => { if (!Array.isArray(items)) return 0; return items.length; } ); /** * Select if wishlist is empty */ export const selectIsWishlistEmpty = createSelector( [selectWishlistItems], (items) => !Array.isArray(items) || items.length === 0 ); /** * Select if wishlist has items */ export const selectHasWishlistItems = createSelector( [selectIsWishlistEmpty], (isEmpty) => !isEmpty ); /** * Select wishlist item by product ID */ export const selectWishlistItemById = createSelector( [selectWishlistItems, (_state: RootState, productId: number) => productId], (items, productId): WishListItem | undefined => { if (!Array.isArray(items)) return undefined; return items.find((item) => item.id === productId); } ); /** * Check if a product is in the wishlist */ export const selectIsProductInWishlist = createSelector( [selectWishlistItemById], (item) => !!item ); /** * Select all product IDs in wishlist */ export const selectWishlistProductIds = createSelector( [selectWishlistItems], (items) => { if (!Array.isArray(items)) return []; return items.map((item) => item.id); } ); /** * Select wishlist items sorted by title */ export const selectWishlistItemsSortedByTitle = createSelector( [selectWishlistItems], (items) => { if (!Array.isArray(items)) return []; return [...items].sort((a, b) => a.title.localeCompare(b.title)); } ); /** * Select wishlist items sorted by price (lowest first) */ export const selectWishlistItemsSortedByPriceAsc = createSelector( [selectWishlistItems], (items) => { if (!Array.isArray(items)) return []; return [...items].sort((a, b) => a.discountedPrice - b.discountedPrice); } ); /** * Select wishlist items sorted by price (highest first) */ export const selectWishlistItemsSortedByPriceDesc = createSelector( [selectWishlistItems], (items) => { if (!Array.isArray(items)) return []; return [...items].sort((a, b) => b.discountedPrice - a.discountedPrice); } ); /** * Select items with discounts */ export const selectDiscountedWishlistItems = createSelector( [selectWishlistItems], (items) => { if (!Array.isArray(items)) return []; return items.filter((item) => item.discountedPrice < item.price); } ); /** * Select in-stock wishlist items */ export const selectInStockWishlistItems = createSelector( [selectWishlistItems], (items) => { if (!Array.isArray(items)) return []; return items.filter((item) => item.status === 'in_stock' || !item.status); } ); /** * Select out-of-stock wishlist items */ export const selectOutOfStockWishlistItems = createSelector( [selectWishlistItems], (items) => { if (!Array.isArray(items)) return []; return items.filter((item) => item.status === 'out_of_stock'); } ); /** * Select total value of wishlist items */ export const selectWishlistTotalValue = createSelector( [selectWishlistItems], (items) => { if (!Array.isArray(items)) return 0; return items.reduce((total, item) => total + item.discountedPrice, 0); } ); /** * Select total savings in wishlist (original price - discounted price) */ export const selectWishlistTotalSavings = createSelector( [selectWishlistItems], (items) => { if (!Array.isArray(items)) return 0; return items.reduce( (total, item) => total + (item.price - item.discountedPrice), 0 ); } ); /** * Select wishlist summary */ export const selectWishlistSummary = createSelector( [ selectWishlistItems, selectWishlistItemCount, selectWishlistTotalValue, selectWishlistTotalSavings, ], (items, count, totalValue, savings) => ({ items, count, totalValue, savings, hasSavings: savings > 0, }) ); |