#434

frontend/src/lib/counts.ts

@@ -1,4 +1,4 @@
-import { apiGet } from '@/lib/api'
+import { apiGet, apiPost } from '@/lib/api'
 
 import type { LocaleCode } from '@/lib/locales'
 import type { TagNameSnapshot } from '@/types'
@@ -216,16 +216,42 @@ export const changeCountSort = (
 }
 
 
+export const selectedCountFields = (
+    fields: CountField[],
+    params: URLSearchParams,
+    selectionKey: string,
+    parent = '',
+): CountField[] => {
+  const selected = params.has (selectionKey)
+      ? new Set (params.get (selectionKey)!.split (',')) : null
+  return orderedCountFields (fields, params, parent)
+      .filter (field => selected == null || selected.has (field.key))
+}
+
+
 export const normaliseCountsParams = (
     resource: CountsResource,
     source: URLSearchParams,
 ): URLSearchParams => {
   const params = new URLSearchParams (source)
   params.delete ('event_type')
-  if (!params.has ('mode'))
-    params.set ('mode', source.has ('axis') ? 'summary' : 'state')
-  if (!['month', 'user'].includes (params.get ('axis') ?? ''))
-    params.set ('axis', 'month')
+  const legacy = params.get ('mode')
+  if (['state', 'trend', 'snapshot'].includes (legacy ?? ''))
+  {
+    params.set ('mode', legacy === 'snapshot' ? 'details' : 'summary')
+    if (legacy !== 'snapshot') params.set ('axis', resource === 'posts' ? 'tags' : 'month')
+    if (legacy === 'trend')
+    {
+      if (params.get ('before')) params.set ('at', params.get ('before')!)
+      params.delete ('from')
+      params.delete ('before')
+    }
+  }
+  if (!params.has ('mode')) params.set ('mode', 'summary')
+  const axes = (resource === 'posts' && params.get ('basis') !== 'history')
+      ? ['tags', 'month', 'user'] : ['month', 'user']
+  if (!axes.includes (params.get ('axis') ?? '')) params.set ('axis', axes[0])
+  params.delete ('grain')
   if (params.has ('columns'))
   {
     const selected = new Set (params.get ('columns')!.split (','))
@@ -237,17 +263,14 @@ export const normaliseCountsParams = (
 
 
 export const isCountsState = (params: URLSearchParams): boolean =>
-    ['state', 'trend', 'snapshot'].includes (params.get ('mode') ?? 'state')
+    params.get ('basis') !== 'history'
 
 
 export const countsRequestParams = (params: URLSearchParams): URLSearchParams => {
   const result = new URLSearchParams (params)
-  const hidden = isCountsState (params)
-      ? ['axis', 'latest', 'user_id', 'resource_id']
-      : ['at', 'grain', 'kind']
-  if (isCountsState (params) && params.get ('mode') !== 'trend')
-    hidden.push ('from', 'before')
-  for (const key of ['columns', 'children', 'child_sort', 'nested_json', 'order', ...hidden])
+  const hidden = isCountsState (params) ? ['latest'] : ['kind']
+  for (const key of ['columns', 'summary_columns', 'children', 'child_sort',
+		    'nested_json', 'order', 'basis', 'grain', ...hidden])
     result.delete (key)
   return result
 }
@@ -257,9 +280,24 @@ export const fetchCounts = (
     resource: CountsResource,
     params: URLSearchParams,
     locale: LocaleCode,
-): Promise<CountsResult> => apiGet (isCountsState (params) ? '/counts/state' : `/counts/${resource}`, {
-    locale, params: { ...Object.fromEntries (countsRequestParams (params)),
-	...(isCountsState (params) ? { resource } : { }) } })
+): Promise<CountsResult> => apiGet (
+    isCountsState (params) ? '/counts/state' : `/counts/${resource}`, {
+	locale, params: { ...Object.fromEntries (countsRequestParams (params)),
+	    ...(isCountsState (params) ? { resource } : { }) } })
+
+
+export const exportCounts = (
+    resource: CountsResource,
+    params: URLSearchParams,
+    locale: LocaleCode,
+    format: 'json' | 'csv',
+    columns: string[],
+    headers: string[],
+    labels: Record<string, string>,
+): Promise<Blob> => apiPost ('/counts/export', {
+    ...Object.fromEntries (params), resource, format,
+    columns: columns.join (','), headers: JSON.stringify (headers),
+    labels: JSON.stringify (labels) }, { locale, responseType: 'blob' })