Initial commit

miniprogram/utils/format.ts

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+export function formatDistance(meters: number): string {
+  if (meters < 1000) return `${Math.round(meters)}m`
+  return `${(meters / 1000).toFixed(1)}km`
+}
+
+export function formatTime(isoString: string): string {
+  const date = new Date(isoString)
+  const now = new Date()
+  const diffMs = now.getTime() - date.getTime()
+  const diffMin = Math.floor(diffMs / 60000)
+  const diffHour = Math.floor(diffMin / 60)
+  const diffDay = Math.floor(diffHour / 24)
+
+  if (diffMin < 1) return '刚刚'
+  if (diffMin < 60) return `${diffMin}分钟前`
+  if (diffHour < 24) return `${diffHour}小时前`
+  if (diffDay < 7) return `${diffDay}天前`
+
+  const month = date.getMonth() + 1
+  const day = date.getDate()
+  return `${month}月${day}日`
+}
+
+export function formatLastSeen(isoString: string): string {
+  const diffMin = Math.floor((Date.now() - new Date(isoString).getTime()) / 60000)
+  if (diffMin < 2) return '刚刚在线'
+  if (diffMin < 60) return `${diffMin}分钟前`
+  const diffHour = Math.floor(diffMin / 60)
+  if (diffHour < 24) return `${diffHour}小时前`
+  return '昨天在线'
+}
+
+export function formatCount(n: number): string {
+  if (n < 1000) return String(n)
+  if (n < 10000) return `${(n / 1000).toFixed(1)}k`
+  return `${Math.floor(n / 10000)}w`
+}
+
+export function getAvatarGradient(seed: string): string {
+  const gradients = [
+    'linear-gradient(135deg, #ffd6e8, #fff1a6)',
+    'linear-gradient(135deg, #ffe7a0, #b7f4d2)',
+    'linear-gradient(135deg, #c9f7df, #d9d2ff)',
+    'linear-gradient(135deg, #cfe8ff, #ffd6e8)',
+    'linear-gradient(135deg, #e3d8ff, #c9f7df)',
+  ]
+  let hash = 0
+  for (let i = 0; i < seed.length; i++) hash = (hash * 31 + seed.charCodeAt(i)) & 0xffffffff
+  return gradients[Math.abs(hash) % gradients.length]
+}
+
+export function getPetEmoji(species: string, breed?: string): string {
+  if (species === 'cat') return '🐱'
+  if (species === 'other') return '🐾'
+  const dogBreedEmoji: Record<string, string> = {
+    '比熊': '🐩',
+    '柴犬': '🐕',
+    '金毛': '🦮',
+    '哈士奇': '🐺',
+    '萨摩耶': '🐕‍🦺',
+  }
+  return (breed && dogBreedEmoji[breed]) || '🐶'
+}
+
+export function calcDistance(lat1: number, lng1: number, lat2: number, lng2: number): number {
+  const R = 6371000
+  const dLat = (lat2 - lat1) * Math.PI / 180
+  const dLng = (lng2 - lng1) * Math.PI / 180
+  const a = Math.sin(dLat / 2) ** 2 +
+    Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) * Math.sin(dLng / 2) ** 2
+  return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a))
+}