CRM_Montzar/apps/web/src/components/MoneyInput.vue

<script setup lang="ts">
import { nextTick, ref, watch } from 'vue';
import {
  caretIndexForDigitCount,
  countDigitChars,
  formatGroupedInput,
  parseMoneyNumber,
} from '@/lib/money';

const model = defineModel<string | number | null>({ default: '' });

const props = withDefaults(
  defineProps<{
    id?: string;
    placeholder?: string;
    required?: boolean;
    disabled?: boolean;
    readonly?: boolean;
    /** حداکثر رقم اعشار؛ پیش‌فرض ۲ */
    decimals?: number;
    /** اگر true باشد مقدار عددی emit می‌شود (نه رشته) */
    asNumber?: boolean;
    dir?: 'ltr' | 'rtl';
  }>(),
  {
    required: false,
    disabled: false,
    readonly: false,
    decimals: 2,
    asNumber: false,
    dir: 'ltr',
  },
);

const text = ref('');
const focused = ref(false);
const inputRef = ref<HTMLInputElement | null>(null);

function readModelNumber(): number | null {
  if (model.value === '' || model.value == null) return null;
  const n = typeof model.value === 'number' ? model.value : Number(model.value);
  return Number.isFinite(n) ? n : null;
}

function writeModel(n: number | null) {
  if (props.asNumber || typeof model.value === 'number') {
    model.value = n == null ? (props.asNumber ? 0 : null) : n;
    return;
  }
  model.value = n == null ? '' : String(n);
}

function syncDisplayFromModel() {
  if (focused.value) return;
  const n = readModelNumber();
  text.value = n == null ? '' : formatGroupedInput(n, props.decimals);
}

watch(model, syncDisplayFromModel, { immediate: true });
watch(
  () => props.decimals,
  () => syncDisplayFromModel(),
);

function onFocus() {
  focused.value = true;
}

function onBlur() {
  focused.value = false;
  const n = parseMoneyNumber(text.value, props.decimals);
  writeModel(n);
  text.value = n == null ? '' : formatGroupedInput(n, props.decimals);
}

async function onInput(event: Event) {
  const el = event.target as HTMLInputElement;
  const raw = el.value;
  const caret = el.selectionStart ?? raw.length;
  const digitsBefore = countDigitChars(raw.slice(0, caret));

  const endsWithSep = /[.\u066B]$/.test(normalizeSep(raw));
  const n = parseMoneyNumber(raw, props.decimals);

  if (n == null) {
    // اجازهٔ تایپ ناقص مثل "-" یا خالی
    const cleaned = raw.replace(/[^\d۰-۹٠-٩.\u066B٬,،\s-]/g, '');
    text.value = cleaned;
    writeModel(null);
    return;
  }

  let display = formatGroupedInput(n, props.decimals);
  if (endsWithSep && props.decimals > 0 && Number.isInteger(n)) {
    display += '٫';
  }

  text.value = display;
  writeModel(n);

  await nextTick();
  const input = inputRef.value;
  if (!input) return;
  const nextCaret = caretIndexForDigitCount(display, digitsBefore);
  input.setSelectionRange(nextCaret, nextCaret);
}

function normalizeSep(raw: string): string {
  return raw.replace(/٫/g, '.');
}
</script>

<template>
  <input
    :id="id"
    ref="inputRef"
    class="money-input"
    type="text"
    inputmode="decimal"
    autocomplete="off"
    :dir="dir"
    :placeholder="placeholder"
    :required="required"
    :disabled="disabled"
    :readonly="readonly"
    :value="text"
    @focus="onFocus"
    @blur="onBlur"
    @input="onInput"
  />
</template>

<style scoped>
.money-input {
  font-variant-numeric: tabular-nums;
}
</style>