From c46f34d21e1f4ed66c13a344b8d434bf108bbe70 Mon Sep 17 00:00:00 2001
From: I Made Setia Baruna <setia.baruna@sprintasia.co.id>
Date: Sat, 24 Oct 2020 00:37:40 +0700
Subject: [PATCH] Add select component

---
 src/components/Select.svelte | 137 +++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 src/components/Select.svelte

diff --git a/src/components/Select.svelte b/src/components/Select.svelte
new file mode 100644
index 00000000..485ff8b4
--- /dev/null
+++ b/src/components/Select.svelte
@@ -0,0 +1,137 @@
+<script>
+  import { fade } from 'svelte/transition';
+  import Icon from './Icon.svelte';
+  import { mdiChevronDown, mdiCheck } from '@mdi/js';
+
+  export let icon = null;
+  export let options;
+  export let placeholder = 'Select...';
+  export let multiselect = false;
+  export let image = false;
+
+  export let selected = null;
+  export let selectedMulti = new Set();
+  export let selectedIndex = -1;
+  export let hoveredIndex = -1;
+
+  let label = '';
+  let labelMulti = '';
+  let focused = false;
+  let container;
+
+  function toggleOptions() {
+    focused = !focused;
+  }
+
+  function select(index) {
+    if (multiselect) {
+      if (selectedMulti.has(index)) {
+        selectedMulti.delete(index);
+        selectedMulti = selectedMulti;
+      } else {
+        selectedMulti.add(index);
+        selectedMulti = selectedMulti;
+      }
+
+      selected = [...selectedMulti].map((e) => options[e]);
+      return;
+    }
+
+    selectedIndex = index;
+    selected = options[index];
+    focused = false;
+    hoveredIndex = -1;
+  }
+
+  function onWindowClick(event) {
+    if (!container) return;
+    const eventTarget = event.path && event.path.length > 0 ? event.path[0] : event.target;
+    if (container.contains(eventTarget)) return;
+    focused = false;
+    hoveredIndex = -1;
+  }
+
+  function onHover(index) {
+    hoveredIndex = index;
+  }
+
+  function onKeyDown(event) {
+    if (!focused) return;
+    switch (event.key) {
+      case 'ArrowDown':
+        event.preventDefault();
+        hoveredIndex = hoveredIndex === options.length - 1 ? 0 : hoveredIndex + 1;
+        break;
+      case 'ArrowUp':
+        event.preventDefault();
+        hoveredIndex = hoveredIndex === 0 ? options.length - 1 : hoveredIndex - 1;
+        break;
+      case 'Enter':
+        event.preventDefault();
+        if (hoveredIndex >= 0 && hoveredIndex < options.length) select(hoveredIndex);
+        break;
+      case 'Escape':
+        event.preventDefault();
+        focused = false;
+        hoveredIndex = -1;
+        break;
+    }
+  }
+
+  $: if (multiselect) {
+    if (selectedMulti.size === 1) {
+      labelMulti = options[selectedMulti.values().next().value].label;
+    } else {
+      labelMulti = `${selectedMulti.size} selected`;
+    }
+  }
+
+  $: nothingSelected = multiselect ? selectedMulti.size === 0 : selected === null;
+  $: if (!nothingSelected) {
+    label = multiselect ? labelMulti : selected.label;
+  }
+
+  $: classes = focused ? 'border-primary' : 'border-transparent';
+  $: iconClasses = focused ? 'transform rotate-180' : '';
+</script>
+
+<style>
+  .hovered {
+    @apply text-white !important;
+    @apply bg-primary;
+  }
+</style>
+
+<svelte:window on:click={onWindowClick} on:keydown={onKeyDown} />
+
+<div class="select-none relative flex-1" bind:this={container}>
+  <button
+    class={`flex w-full relative items-center px-4 bg-item rounded-2xl h-14 focus:outline-none focus:border-primary border-2 border-transparent ease-in duration-100 ${classes}`}
+    on:click={toggleOptions}>
+    {#if icon}
+      <Icon path={icon} color="white" className="mr-3" />
+    {/if}
+    <span class={nothingSelected ? 'text-gray-500' : 'text-white'}>{nothingSelected ? placeholder : label}</span>
+    <Icon path={mdiChevronDown} color="white" className={`absolute right-0 mr-4 duration-100 ease-in ${iconClasses}`} />
+  </button>
+  {#if focused}
+    <div
+      transition:fade={{ duration: 100 }}
+      class="bg-item rounded-2xl absolute mt-2 p-2 w-full z-50 flex flex-col text-white shadow-select border border-background">
+      {#each options as option, index}
+        <span
+          on:click={() => select(index)}
+          on:mouseenter={() => onHover(index)}
+          class={`p-3 rounded-xl cursor-pointer flex
+            ${selectedIndex === index || selectedMulti.has(index) ? 'text-primary font-semibold' : ''}
+            ${hoveredIndex === index ? 'hovered' : ''}`}>
+          {#if image}<img class="w-6 h-6 mr-2" src={option.image} alt={option.label} />{/if}
+          <span class="flex-1">{option.label}</span>
+          {#if multiselect && selectedMulti.has(index)}
+            <Icon path={mdiCheck} color="white" />
+          {/if}
+        </span>
+      {/each}
+    </div>
+  {/if}
+</div>