show testimonial previews

frontend/rabbi_gerzi/src/views/HomePage.vue

@@ -23,6 +23,8 @@ interface Testimonial {
   quote: string
 }
 
+type TestimonialPosition = 'active' | 'previous' | 'next' | 'hidden'
+
 const testimonials: Testimonial[] = [
   {
     name: 'Nathaniel M',
@@ -45,12 +47,62 @@ const testimonials: Testimonial[] = [
 
 const testimonialIndex = ref(0)
 
+function previousTestimonialIndex(): number {
+  if (testimonialIndex.value === 0) {
+    return testimonials.length - 1
+  }
+
+  return testimonialIndex.value - 1
+}
+
+function nextTestimonialIndex(): number {
+  return (testimonialIndex.value + 1) % testimonials.length
+}
+
+function testimonialPosition(index: number): TestimonialPosition {
+  if (index === testimonialIndex.value) {
+    return 'active'
+  }
+
+  if (index === previousTestimonialIndex()) {
+    return 'previous'
+  }
+
+  if (index === nextTestimonialIndex()) {
+    return 'next'
+  }
+
+  return 'hidden'
+}
+
+function testimonialDataCy(index: number): string {
+  const position = testimonialPosition(index)
+
+  if (position === 'active') {
+    return 'testimonial-active'
+  }
+
+  if (position === 'previous') {
+    return 'testimonial-previous-preview'
+  }
+
+  if (position === 'next') {
+    return 'testimonial-next-preview'
+  }
+
+  return 'testimonial-hidden'
+}
+
+function testimonialClass(index: number): string {
+  return `testimonials__card--${testimonialPosition(index)}`
+}
+
 function nextTestimonial(): void {
-  testimonialIndex.value = (testimonialIndex.value + 1) % testimonials.length
+  testimonialIndex.value = nextTestimonialIndex()
 }
 
 function previousTestimonial(): void {
-  testimonialIndex.value = (testimonialIndex.value - 1 + testimonials.length) % testimonials.length
+  testimonialIndex.value = previousTestimonialIndex()
 }
 
 const newsletterFullName = ref('')
@@ -229,16 +281,14 @@ const projects: Project[] = [
     <section class="testimonials" data-cy="testimonials">
       <div class="testimonials__inner">
         <h2 class="testimonials__heading">What People Are Saying</h2>
-        <div class="testimonials__stage">
+        <div class="testimonials__stage" data-cy="testimonials-stage">
           <div
             v-for="(testimonial, index) in testimonials"
             :key="testimonial.name"
             class="testimonials__card"
-            :class="{
-              'testimonials__card--active': index === testimonialIndex,
-            }"
-            :data-cy="index === testimonialIndex ? 'testimonial-active' : 'testimonial-side'"
-            :aria-hidden="index !== testimonialIndex"
+            :class="testimonialClass(index)"
+            :data-cy="testimonialDataCy(index)"
+            :aria-hidden="testimonialPosition(index) !== 'active'"
           >
             <h3 class="testimonials__name">{{ testimonial.name }}</h3>
             <p class="testimonials__quote">&ldquo;{{ testimonial.quote }}&rdquo;</p>
@@ -666,7 +716,10 @@ const projects: Project[] = [
 
 .testimonials__stage {
   position: relative;
+  width: min(100%, 960px);
+  margin: 0 auto;
   min-height: 220px;
+  overflow: hidden;
 }
 
 .testimonials__card {
@@ -674,18 +727,42 @@ const projects: Project[] = [
   border-radius: 14px;
   padding: 2rem;
   text-align: left;
+  width: 50%;
   max-width: 480px;
-  margin: 0 auto;
   opacity: 0;
   visibility: hidden;
   position: absolute;
-  inset: 0;
-  transition: opacity 0.3s ease;
+  top: 0;
+  left: 50%;
+  margin: 0;
+  box-sizing: border-box;
+  pointer-events: none;
+  transform: translateX(-50%);
+  transition:
+    opacity 0.3s ease,
+    transform 0.3s ease;
 }
 
 .testimonials__card--active {
   opacity: 1;
   visibility: visible;
+  z-index: 2;
+  transform: translateX(-50%);
+}
+
+.testimonials__card--previous,
+.testimonials__card--next {
+  opacity: 0.35;
+  visibility: visible;
+  z-index: 1;
+}
+
+.testimonials__card--previous {
+  transform: translateX(-150%);
+}
+
+.testimonials__card--next {
+  transform: translateX(50%);
 }
 
 .testimonials__name {