fix: Optimize Recipe Favorites/Ratings (#6075)

frontend/components/Domain/Recipe/RecipeCardRating.vue

@@ -0,0 +1,101 @@
+<template>
+  <div class="rating-display">
+    <span
+      v-for="(star, index) in ratingDisplay"
+      :key="index"
+      class="star"
+      :class="{
+        'star-half': star === 'half',
+        'text-secondary': !useGroupStyle,
+        'text-grey-darken-1': useGroupStyle,
+      }"
+    >
+      <!-- We render both the full and empty stars for "half" stars because they're layered over each other -->
+      <span
+        v-if="star === 'empty' || star === 'half'"
+        class="star-empty"
+      >
+        ☆
+      </span>
+      <span
+        v-if="star === 'full' || star === 'half'"
+        class="star-full"
+      >
+        ★
+      </span>
+    </span>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { useLoggedInState } from "~/composables/use-logged-in-state";
+import { useUserSelfRatings } from "~/composables/use-users";
+
+type Star = "full" | "half" | "empty";
+
+const props = defineProps({
+  modelValue: {
+    type: Number,
+    default: 0,
+  },
+  recipeId: {
+    type: String,
+    default: "",
+  },
+});
+
+const { isOwnGroup } = useLoggedInState();
+const { userRatings } = useUserSelfRatings();
+
+const userRating = computed(() => {
+  return userRatings.value.find(r => r.recipeId === props.recipeId)?.rating ?? undefined;
+});
+
+const ratingValue = computed(() => userRating.value || props.modelValue || 0);
+const useGroupStyle = computed(() => isOwnGroup.value && !userRating.value && props.modelValue);
+const ratingDisplay = computed<Star[]>(
+  () => {
+    const stars: Star[] = [];
+
+    for (let i = 0; i < 5; i++) {
+      const diff = ratingValue.value - i;
+      if (diff >= 1) {
+        stars.push("full");
+      }
+      else if (diff >= 0.25) { // round to half star if rating is at least 0.25 but not quite a full star
+        stars.push("half");
+      }
+      else {
+        stars.push("empty");
+      }
+    }
+
+    return stars;
+  },
+);
+</script>
+
+<style lang="scss" scoped>
+.rating-display {
+  display: inline-flex;
+  align-items: center;
+  gap: 1px;
+
+  .star {
+    font-size: 18px;
+    transition: color 0.2s ease;
+    user-select: none;
+    position: relative;
+    display: inline-block;
+    &.star-half {
+      .star-full {
+        position: absolute;
+        left: 0;
+        top: 0;
+        width: 50%;
+        overflow: hidden;
+      }
+    }
+  }
+}
+</style>