#434

frontend/src/lib/counts.ts

@@ -0,0 +1,44 @@
+import { apiGet } from '@/lib/api'
+
+import type { LocaleCode } from '@/lib/locales'
+import type { PostVersion, TagVersion } from '@/types'
+
+export type CountsResource = 'posts' | 'tags'
+export type CountsResult = {
+    count: number
+    page: number
+    limit: number
+    groupCount?: number
+    groups?: { key: string | number | null; name: string | null; count: number }[]
+    versions?: (PostVersion | TagVersion)[] }
+
+export const countColumns = {
+    created_at: '変更日時', resource_id: 'ID', version_no: '版番号',
+    event_type: '操作種別', user: '操作者', title: '投稿タイトル', url: '投稿 URL',
+    tags: '記載タグ', added_tags: '追加されたタグ', removed_tags: '削除されたタグ',
+    name: 'タグ名', category: 'カテゴリ', aliases: '別名', parents: '上位タグ',
+    deprecated: '廃止状態' }
+
+export type CountColumn = keyof typeof countColumns
+
+
+export const columnsForCounts = (resource: CountsResource): CountColumn[] => [
+    'created_at', 'resource_id', 'version_no', 'event_type', 'user',
+    ...(resource === 'posts'
+	? ['title', 'url', 'tags', 'added_tags', 'removed_tags'] as const
+	: ['name', 'category', 'aliases', 'parents', 'deprecated'] as const)]
+
+
+export const fetchCounts = (
+    resource: CountsResource,
+    params: URLSearchParams,
+    locale: LocaleCode,
+): Promise<CountsResult> => apiGet (`/counts/${resource}`, {
+    locale, params: Object.fromEntries (params) })
+
+
+export const countsCSV = (rows: string[][]): string =>
+    '\uFEFF' + rows.map (row => row.map (value => {
+      const safe = /^[=+@\-\t\r]/.test (value) ? `'${value}` : value
+      return `"${safe.replaceAll ('"', '""')}"`
+    }).join (',')).join ('\r\n')