Sliced history

src/components/chat/bubbles.ts

@@ -45,6 +45,7 @@ import { fastRaf } from "../../helpers/schedulers";
 import { deferredPromise } from "../../helpers/cancellablePromise";
 import RepliesElement from "./replies";
 import DEBUG from "../../config/debug";
+import { SliceEnd } from "../../helpers/slicedArray";
 
 const USE_MEDIA_TAILS = false;
 const IGNORE_ACTIONS = ['messageActionHistoryClear'];
@@ -2696,7 +2697,7 @@ export default class ChatBubbles {
         additionMsgIds = [additionMsgId];
       } else {
         const historyStorage = this.appMessagesManager.getHistoryStorage(peerId, this.chat.threadId);
-        if(historyStorage.history.length < loadCount) {
+        if(historyStorage.history.length < loadCount && !historyStorage.history.slice.isEnd(SliceEnd.Both)) {
           additionMsgIds = historyStorage.history.slice.slice();
 
           // * filter last album, because we don't know is it the last item
@@ -2718,7 +2719,7 @@ export default class ChatBubbles {
     let resultPromise: Promise<any>;
 
     //const isFirstMessageRender = !!additionMsgID && result instanceof Promise && !appMessagesManager.getMessage(additionMsgID).grouped_id;
-    const isAdditionRender = additionMsgIds?.length;
+    const isAdditionRender = additionMsgIds?.length && result instanceof Promise;
     const isFirstMessageRender = (this.isFirstLoad && backLimit && result instanceof Promise) || isAdditionRender;
     if(isAdditionRender) {
       resultPromise = result as Promise<any>;
@@ -2729,18 +2730,17 @@ export default class ChatBubbles {
     this.isFirstLoad = false;
 
     const processResult = (historyResult: typeof result) => {
-      /* if(this.chat.type === 'discussion' && 'offsetIdOffset' in historyResult) {
-        const isTopEnd = historyResult.offsetIdOffset >= (historyResult.count - loadCount);
+      if(this.chat.type === 'discussion' && 'offsetIdOffset' in historyResult) {
         //this.log('discussion got history', loadCount, backLimit, historyResult, isTopEnd);
 
         // * inject discussion start
-        if(isTopEnd) {
+        if(historyResult.history.isEnd(SliceEnd.Top)) {
           const serviceStartMessageId = this.appMessagesManager.threadsServiceMessagesIdsStorage[this.peerId + '_' + this.chat.threadId];
           if(serviceStartMessageId) historyResult.history.push(serviceStartMessageId);
           historyResult.history.push(...this.chat.getMidsByMid(this.chat.threadId).reverse());
           this.scrollable.loadedAll.top = true;
         }
-      } */
+      }
     };
 
     const sup = (result: HistoryResult) => {

src/helpers/slicedArray.ts

@@ -4,25 +4,132 @@
 
 type ItemType = number;
 
-export class Slice extends Array<ItemType> {
-  constructor(protected slicedArray: SlicedArray, items: ItemType[] = []) {
-    super(...items);
+export enum SliceEnd {
+  None = 0,
+  Top = 1,
+  Bottom = 2,
+  Both = 4
+};
 
+export interface Slice extends Array<ItemType> {
+  slicedArray: SlicedArray;
+  end: SliceEnd;
 
+  isEnd: (side: SliceEnd) => boolean;
+  setEnd: (side: SliceEnd) => void;
 }
+
+export interface SliceConstructor {
+  new(...items: ItemType[]): Slice;
 }
 
 // TODO: Clear empty arrays after deleting items
 export default class SlicedArray {
   private slices: Slice[]/*  = [[7,6,5],[4,3,2],[1,0,-1]] */;
+  private sliceConstructor: SliceConstructor;
   
   constructor() {
-    this.slices = [new Slice(this)];
+    const self = this;
+    this.sliceConstructor = class Slice extends Array<ItemType> implements Slice {
+      slicedArray: SlicedArray;
+      end: SliceEnd = SliceEnd.None;
+
+      constructor(...items: ItemType[]) {
+        super(...items);
+        this.slicedArray = self;
+      }
+
+      isEnd(side: SliceEnd) {
+        if(this.end & side) {
+          return true;
+        }
+
+        if(side === SliceEnd.Top) {
+          const slice = self.last;
+          return slice.end & side ? this.includes(slice[slice.length - 1]) : false;
+        } else if(side === SliceEnd.Bottom) {
+          const slice = self.first;
+          return slice.end & side ? this.includes(slice[0]) : false;
+        }/*  else if(side === SliceEnd.Both) {
+
+        } */
+
+        return false;
+      }
+
+      setEnd(side: SliceEnd) {
+        this.end |= side;
+
+        if(side !== SliceEnd.Both && this.end & SliceEnd.Top && this.end & SliceEnd.Bottom) {
+          this.end |= SliceEnd.Both;
+        }
+      }
+    }
+
+    const first = this.constructSlice();
+    first.setEnd(SliceEnd.Bottom);
+    this.slices = [first];
+  }
+
+  public constructSlice(...items: ItemType[]) {
+    //const slice = new Slice(this, ...items);
+    const slice = new this.sliceConstructor(...items);
+    return slice;
+    
+    // ! code below will slow execution in 15 times
+    /* const self = this;
+    const p: Slice = new Proxy(slice, {
+      get: function(target, name: any) {
+        if(name === 'constructor') {
+          const p = new Proxy(Slice, {
+            construct: (target, args) => {
+              return self.constructSlice(...args);
+            }
+          });
+
+          return p;
+        }
+
+        return target[name];
+      }
+    });
+
+    return p; */
+
+    /*
+    var p = slicedArray.constructSlice();
+    p.length = 100000;
+    p.fill(255);
+
+    var a = new Array(100000);
+    a.fill(255);
+
+    var b = 0;
+    var perf = performance.now();
+    for(var i = 0; i < p.length; ++i) {
+        b += p[i];
+    }
+
+    console.log('perf 1', performance.now() - perf);
+
+    b = 0;
+    perf = performance.now();
+    for(var i = 0; i < a.length; ++i) {
+        b += a[i];
+    }
+
+    console.log('perf 2', performance.now() - perf);
+    */
   }
 
   public insertSlice(slice: ItemType[]) {
-    if(!this.slices[0].length) {
-      this.slices[0].push(...slice);
+    if(!slice.length) {
+      return;
+    }
+
+    const first = this.slices[0];
+    if(!first.length) {
+      first.push(...slice);
       return;
     }
 
@@ -59,7 +166,7 @@ export default class SlicedArray {
         }
       }
 
-      this.slices.splice(insertIndex, 0, new Slice(this, slice));
+      this.slices.splice(insertIndex, 0, this.constructSlice(...slice));
     }
 
     this.flatten();
@@ -76,6 +183,7 @@ export default class SlicedArray {
 
       const upperIndex = prevSlice.indexOf(nextSlice[0]);
       if(upperIndex !== -1) {
+        prevSlice.setEnd(nextSlice.end);
         this.slices.splice(i + 1, 1);
         length--;
 
@@ -86,10 +194,18 @@ export default class SlicedArray {
 
   // * 
   
-  get slice() {
+  get first() {
     return this.slices[0];
   }
   
+  get last() {
+    return this.slices[this.slices.length - 1];
+  }
+
+  get slice() {
+    return this.first;
+  }
+
   get length() {
     return this.slice.length;
   }
@@ -107,9 +223,10 @@ export default class SlicedArray {
   }
 
   public findSliceOffset(maxId: number) {
+    let slice: Slice;
     for(let i = 0; i < this.slices.length; ++i) {
       let offset = 0;
-      const slice = this.slices[i];
+      slice = this.slices[i];
       if(slice.length < 2) {
         continue;
       }
@@ -128,6 +245,13 @@ export default class SlicedArray {
       }
     }
 
+    if(slice && slice.isEnd(SliceEnd.Top)) {
+      return {
+        slice,
+        offset: slice.length
+      };
+    }
+
     return undefined;
   }
 
@@ -135,6 +259,7 @@ export default class SlicedArray {
   public sliceMe(offsetId: number, add_offset: number, limit: number) {
     let slice = this.slice;
     let offset = 0;
+    let sliceOffset = 0;
 
     if(offsetId) {
       const pos = this.findSliceOffset(offsetId);
@@ -143,30 +268,46 @@ export default class SlicedArray {
       }
 
       slice = pos.slice;
-      offset = pos.offset;
+      offset = sliceOffset = pos.offset;
 
-      if(slice.includes(offsetId) && add_offset < 0) {
-        add_offset += 1;
+      if(slice.includes(offsetId)) {
+        sliceOffset += 1;
       }
+
+      /* if(slice.includes(offsetId) && add_offset < 0) {
+        add_offset += 1;
+      } */
     }
 
-    let sliceEnd = offset + add_offset + limit;
+    let sliceStart = Math.max(sliceOffset + add_offset, 0);
+    let sliceEnd = sliceOffset + add_offset + limit;
     //const fixHalfBackLimit = add_offset && !(limit / add_offset % 2) && (sliceEnd % 2) ? 1 : 0;
     //sliceEnd += fixHalfBackLimit;
 
+    const sliced = slice.slice(sliceStart, sliceEnd) as Slice;
+
+    const topWasMeantToLoad = add_offset < 0 ? limit + add_offset : limit;
+    const bottomWasMeantToLoad = Math.abs(add_offset);
+
+    const topFulfilled = (slice.length - sliceOffset) >= topWasMeantToLoad || slice.isEnd(SliceEnd.Top);
+    const bottomFulfilled = (sliceOffset - bottomWasMeantToLoad) >= 0 || slice.isEnd(SliceEnd.Bottom);
+
+    //console.log('sliceMe', topFulfilled, bottomFulfilled);
+
     return {
-      slice: slice.slice(Math.max(offset + add_offset, 0), sliceEnd), 
-      offsetIdOffset: offset
+      slice: sliced, 
+      offsetIdOffset: offset,
+      fulfilled: SliceEnd.None | (topFulfilled && bottomFulfilled ? SliceEnd.Both : ((topFulfilled ? SliceEnd.Top : SliceEnd.None) | (bottomFulfilled ? SliceEnd.Bottom : SliceEnd.None)))
     };
   }
 
-  public unshift(item: ItemType) {
-    this.slice.unshift(item);
+  public unshift(...items: ItemType[]) {
+    this.first.unshift(...items);
   }
 
-  /* public push(item: ItemType) {
-    this.slice.push(item);
-  } */
+  public push(...items: ItemType[]) {
+    this.last.push(...items);
+  }
 
   public delete(item: ItemType) {
     const found = this.findSlice(item);

src/lib/appManagers/appMessagesManager.ts

@@ -36,7 +36,7 @@ import pushHeavyTask from "../../helpers/heavyQueue";
 import { getFileNameByLocation } from "../../helpers/fileName";
 import appProfileManager from "./appProfileManager";
 import DEBUG, { MOUNT_CLASS_TO } from "../../config/debug";
-import SlicedArray from "../../helpers/slicedArray";
+import SlicedArray, { Slice, SliceEnd } from "../../helpers/slicedArray";
 
 //console.trace('include');
 // TODO: если удалить сообщение в непрогруженном диалоге, то при обновлении, из-за стейта, последнего сообщения в чатлисте не будет
@@ -59,8 +59,8 @@ export type HistoryStorage = {
 
 export type HistoryResult = {
   count: number,
-  history: number[],
-  offsetIdOffset?: number
+  history: Slice,
+  offsetIdOffset?: number,
 };
 
 export type Dialog = MTDialog.dialog;
@@ -2124,7 +2124,7 @@ export class AppMessagesManager {
    */
   public getServerMessageId(messageId: number) {
     const q = AppMessagesManager.MESSAGE_ID_OFFSET;
-    if(messageId <= q) {
+    if(messageId < q) { // id 0 -> mid 0xFFFFFFFF, so 0xFFFFFFFF must convert to 0
       return messageId;
     }
 
@@ -3307,12 +3307,13 @@ export class AppMessagesManager {
     const threadKey = message.peerId + '_' + message.mid;
     if(this.threadsServiceMessagesIdsStorage[threadKey]) return;
 
+    const maxMessageId = this.getServerMessageId(Math.max(...this.getMidsByMessage(message)));
     const serviceStartMessage: Message.messageService = {
       _: 'messageService',
       pFlags: {
         is_single: true
       } as any,
-      id: this.generateMessageId(message.id, true),
+      id: this.generateMessageId(maxMessageId, true),
       date: message.date,
       from_id: {_: 'peerUser', user_id: 0}/* message.from_id */,
       peer_id: message.peer_id,
@@ -4629,7 +4630,7 @@ export class AppMessagesManager {
     }
 
     const haveSlice = historyStorage.history.sliceMe(maxId, offset, limit);
-    if(haveSlice && (haveSlice.slice.length === limit || haveSlice.slice.includes(historyStorage.maxId))) {
+    if(haveSlice && (haveSlice.slice.length === limit || (haveSlice.fulfilled & SliceEnd.Both))) {
       return {
         count: historyStorage.count,
         history: haveSlice.slice,
@@ -4641,16 +4642,19 @@ export class AppMessagesManager {
       const slice = historyStorage.history.sliceMe(maxId, offset, limit);
       return {
         count: historyStorage.count,
-        history: slice?.slice || [],
+        history: slice?.slice || historyStorage.history.constructSlice(),
         offsetIdOffset: slice?.offsetIdOffset || historyStorage.count
       };
     });
   }
 
-  public fillHistoryStorage(peerId: number, maxId: number, fullLimit: number, offset: number, historyStorage: HistoryStorage, threadId?: number): Promise<void> {
-    return this.requestHistory(peerId, maxId, fullLimit, offset, undefined, threadId).then((historyResult) => {
+  public fillHistoryStorage(peerId: number, offset_id: number, limit: number, add_offset: number, historyStorage: HistoryStorage, threadId?: number): Promise<void> {
+    return this.requestHistory(peerId, offset_id, limit, add_offset, undefined, threadId).then((historyResult) => {
       historyStorage.count = (historyResult as MessagesMessages.messagesMessagesSlice).count || historyResult.messages.length;
 
+      const offsetIdOffset = (historyResult as MessagesMessages.messagesMessagesSlice).offset_id_offset || 0;
+      const isTopEnd = offsetIdOffset >= (historyStorage.count - limit) || historyStorage.count < (limit + add_offset);
+
       /* if(!maxId && historyResult.messages.length) {
         maxId = this.incrementMessageId((historyResult.messages[0] as MyMessage).mid, 1);
       }
@@ -4666,19 +4670,23 @@ export class AppMessagesManager {
       const mids = historyResult.messages.map((message) => (message as MyMessage).mid);
       // * add bound manually. 
       // * offset_id will be inclusive only if there is 'add_offset' <= -1 (-1 - will only include the 'offset_id')
-      if(maxId && !mids.includes(maxId)) {
+      if(offset_id && !mids.includes(offset_id) && offsetIdOffset < historyStorage.count) {
         let i = 0;
         for(const length = mids.length; i < length; ++i) {
-          if(maxId > mids[i]) {
+          if(offset_id > mids[i]) {
             break;
           }
         }
 
-        mids.splice(i, 0, maxId);
+        mids.splice(i, 0, offset_id);
       }
       
       historyStorage.history.insertSlice(mids);
 
+      if(isTopEnd) {
+        historyStorage.history.last.setEnd(SliceEnd.Top);
+      }
+      
       /* const isBackLimit = offset < 0 && -offset !== fullLimit;
       if(isBackLimit) {
         return;