munch-ease-frontend/src/components/meals/PersonList.vue

<template>
  <span class="person-list">
    <span v-for="person in people" :key="person.id">
      <button class="person-circle remove-person" @click="$emit('remove-person', person)">
        {{ person.name }}
      </button>
    </span>
    <span>
      <button
        v-if="!isAddingPerson"
        class="person-circle add-person"
        @click="isAddingPerson = true"
      >
        +
      </button>
      <input
        v-else
        v-model="searchName"
        ref="searchNameInput"
        @keyup.enter="addPerson"
        @keyup.esc="isAddingPerson = false"
        @blur="isAddingPerson = false"
      />
      <ul
        class="person-droplist"
        ref="persondroplist"
        v-if="isAddingPerson && searchResults.length"
      >
        <li v-for="person in searchResults" :key="person.id">
          <button class="person-circle add-person" @mousedown="addPerson(person)">
            {{ person.name }}
          </button>
        </li>
      </ul>
    </span>
  </span>
</template>

<style scoped>
.person-list {
  display: inline-block;
  text-align: center;
  min-height: 50px;
  padding: 0;
  margin: 0;
}

/* Remove all the button styling */
.person-circle {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
}

/* Show the initials of the person in a circle */
.person-circle {
  display: inline-block;
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  border-radius: 50%;
  background: #eee;
}

/* On hover, prompt the user to click to remove the person */
/* change opacity of circle, and use css to add a large cross over the circle */
.remove-person:hover {
  cursor: pointer;
  position: relative;
  background-color: lightcoral;
}

/* Add a cross to the circle */
.remove-person:hover::before,
.remove-person:hover::after {
  pointer-events: none;
  content: 'X';
  color: white;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

.add-person {
  background-color: lightgreen;
}

.add-person:hover {
  cursor: pointer;
  font-weight: bolder;
  color: white;
  background-color: green;
}

.person-droplist {
  position: absolute;
  background-color: white;
  border: 1px solid #ccc;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  list-style-type: none;
  padding: 0;
  margin: 0;
  max-height: 40vh;
  overflow-y: scroll;
  z-index: 1000;
}

.person-droplist li {
  padding: 8px;
  cursor: pointer;
  display: inline;
  padding: 1ex 1em;
}
</style>

<script>
import { ref } from 'vue'
import { searchPerson } from '@/api/persons'

export default {
  name: 'PersonList',
  props: {
    people: {
      type: Array,
      default: () => [],
    },
  },
  data() {
    return {
      isAddingPerson: false,
      searchName: '',
      searchResults: [],
    }
  },
  setup() {
    const searchNameInput = ref(null)
    const persondroplist = ref(null)
    return { searchNameInput, persondroplist }
  },
  watch: {
    searchName: async function () {
      await this.updateSearchResults()
    },
    searchNameInput: async function () {
      this.searchNameInput?.focus()
      await this.updateSearchResults()
    },
    persondroplist: function () {
      if (this.persondroplist && this.searchNameInput) {
        // Align the droplist to the input field & its size
        const inputRect = this.searchNameInput.getBoundingClientRect()
        this.persondroplist.style.left = `${inputRect.left}px`
        this.persondroplist.style.top = `${inputRect.bottom}px`
        this.persondroplist.style.width = `${inputRect.width}px`
      }
    },
  },
  methods: {
    async updateSearchResults() {
      const results = await searchPerson(this.searchName)
      // Exclude people already in the list
      const idSet = new Set(this.people.map((p) => p.id))
      this.searchResults = results.filter((p) => !idSet.has(p.id))
    },
    addPerson(person) {
      if (!person && this.searchResults.length > 0) {
        person = this.searchResults[0]
      }

      if (person?.id >= 0 && !this.people.find((p) => p.id === person.id)) {
        this.$emit('add-person', person)
      }

      this.searchName = ''
      this.searchResults = []
      this.isAddingPerson = false
    },
    removePerson(person) {
      this.$emit('remove-person', person)
    },
  },
}
</script>