Rewrite timeline pagination

Using Link in returned headers instead. Also, `since_id` is not the correct way to refresh. See https://mastodonpy.readthedocs.io/en/stable/index.html?highlight=pagination#a-note-about-pagination

src/api/client.js

@@ -23,10 +23,10 @@ export async function client (url, query, { body, ...customConfig } = {}) {
 
   let data
   try {
-    const response = await fetch(`https://${url}${queryString}`, config)
+    const response = await fetch(`${url}${queryString}`, config)
     data = await response.json()
     if (response.ok) {
-      return data
+      return { headers: response.headers, body: data }
     }
     throw new Error(response.statusText)
   } catch (err) {

src/stacks/common/Timeline.jsx

@@ -43,26 +43,11 @@ export default function Timeline ({
           {...(state.pointer && { initialScrollIndex: state.pointer })}
           {...(!disableRefresh && {
             onRefresh: () =>
-              dispatch(
-                fetch({
-                  page,
-                  query: [{ key: 'since_id', value: state.toots[0].id }]
-                })
-              ),
+              dispatch(fetch({ page, paginationDirection: 'prev' })),
             refreshing: state.status === 'loading',
             onEndReached: () => {
               if (!timelineReady) {
-                dispatch(
-                  fetch({
-                    page,
-                    query: [
-                      {
-                        key: 'max_id',
-                        value: state.toots[state.toots.length - 1].id
-                      }
-                    ]
-                  })
-                )
+                dispatch(fetch({ page, paginationDirection: 'next' }))
                 setTimelineReady(true)
               }
             },

src/stacks/common/accountSlice.js

@@ -5,9 +5,9 @@ import { client } from 'src/api/client'
 export const fetch = createAsyncThunk(
   'account/fetch',
   async ({ id }, { getState }) => {
-    const instanceLocal = getState().instanceInfo.local + '/api/v1/'
-
-    return await client.get(`${instanceLocal}accounts/${id}`)
+    const instanceLocal = `https://${getState().instanceInfo.local}/api/v1/`
+    const res = await client.get(`${instanceLocal}accounts/${id}`)
+    return res.body
   }
 )
 

src/stacks/common/timelineSlice.js

@@ -11,11 +11,35 @@ import { client } from 'src/api/client'
 // Hashtag:       hastag
 // List:          list
 
+function getPagination (headers, direction) {
+  if (!headers) console.error('Missing pagination headers')
+  const paginationLinks = headers.get('Link')
+  if (paginationLinks) {
+    if (direction) {
+      return {
+        [direction]: paginationLinks.split(
+          new RegExp(`<([^>]+)>; rel="${direction}"`)
+        )[1]
+      }
+    } else {
+      return {
+        prev: paginationLinks.split(new RegExp(/<([^>]+)>; rel="prev"/))[1],
+        next: paginationLinks.split(new RegExp(/<([^>]+)>; rel="next"/))[1]
+      }
+    }
+  } else {
+    return
+  }
+}
+
 export const fetch = createAsyncThunk(
   'timeline/fetch',
-  async ({ page, query = [], account, hashtag, list, toot }, { getState }) => {
-    const instanceLocal = getState().instanceInfo.local + '/api/v1/'
-    const instanceRemote = getState().instanceInfo.remote + '/api/v1/'
+  async (
+    { page, paginationDirection, query = [], account, hashtag, list, toot },
+    { getState }
+  ) => {
+    const instanceLocal = `https://${getState().instanceInfo.local}/api/v1/`
+    const instanceRemote = `https://${getState().instanceInfo.remote}/api/v1/`
     // If header if needed for remote server
     const header = {
       headers: {
@@ -23,90 +47,123 @@ export const fetch = createAsyncThunk(
       }
     }
 
+    let res
+    // For same page, but only pagination
+    if (paginationDirection) {
+      res = await client.get(
+        getState().timelines[page].pagination[paginationDirection],
+        query,
+        header
+      )
+      return {
+        toots: res.body,
+        pagination: getPagination(res.headers, paginationDirection)
+      }
+    }
+
+    // For each page's first query
     switch (page) {
       case 'Following':
+        res = await client.get(`${instanceLocal}timelines/home`, query, header)
         return {
-          toots: await client.get(
-            `${instanceLocal}timelines/home`,
-            query,
-            header
-          )
+          toots: res.body,
+          pagination: getPagination(res.headers)
         }
+
       case 'Local':
         query.push({ key: 'local', value: 'true' })
+        res = await client.get(
+          `${instanceLocal}timelines/public`,
+          query,
+          header
+        )
         return {
-          toots: await client.get(
-            `${instanceLocal}timelines/public`,
-            query,
-            header
-          )
+          toots: res.body,
+          pagination: getPagination(res.headers)
         }
+
       case 'LocalPublic':
+        res = await client.get(
+          `${instanceLocal}timelines/public`,
+          query,
+          header
+        )
         return {
-          toots: await client.get(
-            `${instanceLocal}timelines/public`,
-            query,
-            header
-          )
+          toots: res.body,
+          pagination: getPagination(res.headers)
         }
+
       case 'RemotePublic':
+        res = await client.get(`${instanceRemote}timelines/public`, query)
         return {
-          toots: await client.get(`${instanceRemote}timelines/public`, query)
+          toots: res.body,
+          pagination: getPagination(res.headers)
         }
+
       case 'Notifications':
+        res = await client.get(`${instanceLocal}notifications`, query, header)
         return {
-          toots: await client.get(
-            `${instanceLocal}notifications`,
-            query,
-            header
-          )
+          toots: res.body,
+          pagination: getPagination(res.headers)
         }
+
       case 'Account_Default':
-        const toots = await client.get(
+        res = await client.get(
           `${instanceLocal}accounts/${account}/statuses`,
           [{ key: 'pinned', value: 'true' }],
           header
         )
-        toots.push(
-          ...(await client.get(
-            `${instanceLocal}accounts/${account}/statuses`,
-            [{ key: 'exclude_replies', value: 'true' }],
-            header
-          ))
+        const toots = res.body
+        res = await client.get(
+          `${instanceLocal}accounts/${account}/statuses`,
+          [{ key: 'exclude_replies', value: 'true' }],
+          header
         )
+        toots.push(...res.body)
         return { toots: toots }
+
       case 'Account_All':
+        res = await client.get(
+          `${instanceLocal}accounts/${account}/statuses`,
+          query,
+          header
+        )
         return {
-          toots: await client.get(
-            `${instanceLocal}accounts/${account}/statuses`,
-            query,
-            header
-          )
+          toots: res.body
         }
+
       case 'Account_Media':
+        res = await client.get(
+          `${instanceLocal}accounts/${account}/statuses`,
+          [{ key: 'only_media', value: 'true' }],
+          header
+        )
         return {
-          toots: await client.get(
-            `${instanceLocal}accounts/${account}/statuses`,
-            [{ key: 'only_media', value: 'true' }],
-            header
-          )
+          toots: res.body
         }
+
       case 'Hashtag':
+        res = await client.get(
+          `${instanceLocal}timelines/tag/${hashtag}`,
+          query,
+          header
+        )
         return {
-          toots: await client.get(
-            `${instanceLocal}timelines/tag/${hashtag}`,
-            query,
-            header
-          )
+          toots: res.body,
+          pagination: getPagination(res.headers)
         }
+
       case 'List':
+        res = await client.get(
+          `${instanceLocal}timelines/list/${list}`,
+          query,
+          header
+        )
         return {
-          toots: await client.get(
-            `${instanceLocal}timelines/list/${list}`,
-            query,
-            header
-          )
+          toots: res.body,
+          pagination: getPagination(res.headers)
         }
+
       case 'Toot':
         const current = await client.get(
           `${instanceLocal}statuses/${toot}`,
@@ -122,14 +179,16 @@ export const fetch = createAsyncThunk(
           toots: [...context.ancestors, current, ...context.descendants],
           pointer: context.ancestors.length
         }
+
       default:
-        console.error('Timeline type error')
+        console.error('First time fetching timeline error')
     }
   }
 )
 
 const timelineInitState = {
   toots: [],
+  pagination: { prev: undefined, next: undefined },
   pointer: undefined,
   status: 'idle'
 }
@@ -160,15 +219,22 @@ export const timelineSlice = createSlice({
     },
     [fetch.fulfilled]: (state, action) => {
       state[action.meta.arg.page].status = 'succeeded'
-      if (
-        action.meta.arg.query &&
-        action.meta.arg.query[0].key === 'since_id'
-      ) {
+
+      if (action.meta.arg.paginationDirection === 'prev') {
         state[action.meta.arg.page].toots.unshift(...action.payload.toots)
       } else {
         state[action.meta.arg.page].toots.push(...action.payload.toots)
       }
-      state[action.meta.arg.page].pointer = action.payload.pointer
+
+      if (action.payload.pagination) {
+        state[action.meta.arg.page].pagination = {
+          ...state[action.meta.arg.page].pagination,
+          ...action.payload.pagination
+        }
+      }
+      if (action.payload.pointer) {
+        state[action.meta.arg.page].pointer = action.payload.pointer
+      }
     },
     [fetch.rejected]: (state, action) => {
       state[action.meta.arg.page].status = 'failed'