feat: get last 20 messages of a channel when joining the chat

src/models/accounts.nim

@@ -2,6 +2,7 @@ import eventemitter
 import json_serialization
 import ../status/accounts as status_accounts
 import ../status/types
+import ../status/libstatus
 
 type
   Address* = ref object
@@ -36,9 +37,15 @@ proc generateAddresses*(self: AccountModel): seq[GeneratedAccount] =
 proc generateRandomAccountAndLogin*(self: AccountModel) =
   let generatedAccounts = status_accounts.generateAddresses()
   let account = status_accounts.setupAccount(generatedAccounts[0], "qwerty")
+  # TODO this is needed for now for the retrieving of past messages. We'll either move or remove it later
+  let peer = "enode://44160e22e8b42bd32a06c1532165fa9e096eebedd7fa6d6e5f8bbef0440bc4a4591fe3651be68193a7ec029021cdb496cfe1d7f9f1dc69eb99226e6f39a7a5d4@35.225.221.245:443"
+  discard libstatus.addPeer(peer)
   self.events.emit("accountsReady", AccountArgs(account: account))
 
 proc storeAccountAndLogin*(self: AccountModel, selectedAccountIndex: int, password: string): Account =
   let generatedAccount: GeneratedAccount = self.generatedAddresses[selectedAccountIndex]
   result = status_accounts.setupAccount(generatedAccount, password)
+  # TODO this is needed for now for the retrieving of past messages. We'll either move or remove it later
+  let peer = "enode://44160e22e8b42bd32a06c1532165fa9e096eebedd7fa6d6e5f8bbef0440bc4a4591fe3651be68193a7ec029021cdb496cfe1d7f9f1dc69eb99226e6f39a7a5d4@35.225.221.245:443"
+  discard libstatus.addPeer(peer)
   self.events.emit("accountsReady", AccountArgs(account: result))

src/models/chat.nim

@@ -1,7 +1,8 @@
-import eventemitter, sets
-import json, sets, eventemitter
+import eventemitter, sets, json, strutils
 import ../status/utils
 import ../status/chat as status_chat
+import chronicles
+import ../status/libstatus
 
 import chat/chat_item
 import chat/chat_message
@@ -34,14 +35,30 @@ proc join*(self: ChatModel, chatId: string) =
 
   self.channels.incl chatId
 
-  # TODO: save chat list in the db
+  let generatedSymKey = status_chat.generateSymKeyFromPassword()
 
+  # TODO get this from the connection or something
+  let peer = "enode://44160e22e8b42bd32a06c1532165fa9e096eebedd7fa6d6e5f8bbef0440bc4a4591fe3651be68193a7ec029021cdb496cfe1d7f9f1dc69eb99226e6f39a7a5d4@35.225.221.245:443"
+
+  # TODO: save chat list in the db
   let oneToOne = isOneToOneChat(chatId)
 
-  status_chat.loadFilters(chatId = chatId, oneToOne = oneToOne)
+  let filterResult = status_chat.loadFilters(chatId = chatId, oneToOne = oneToOne)
   status_chat.saveChat(chatId, oneToOne)
   status_chat.chatMessages(chatId)
 
+  let parsedResult = parseJson(filterResult)["result"]
+  var topics = newSeq[string](0)
+  for topicObj in parsedResult:
+    if (($topicObj["chatId"]).strip(chars = {'"'}) == chatId):
+      topics.add(($topicObj["topic"]).strip(chars = {'"'}))
+
+  if (topics.len == 0):
+    warn "No topic found for the chat. Cannot load past messages"
+  else:
+    status_chat.requestMessages(topics, generatedSymKey, peer, 20)
+
+
 proc sendMessage*(self: ChatModel, chatId: string, msg: string): string =
   var sentMessage = status_chat.sendChatMessage(chatId, msg)
   var parsedMessage = parseJson(sentMessage)["result"]["chats"][0]["lastMessage"]

src/status/chat.nim

@@ -1,9 +1,12 @@
 import core
 import json
 import utils
+import times
+import strutils
+import chronicles
 
-proc loadFilters*(chatId: string, filterId: string = "", symKeyId: string = "", oneToOne: bool = false, identity: string = "", topic: string = "", discovery: bool = false, negotiated: bool = false, listen: bool = true) =
-  discard callPrivateRPC("loadFilters".prefix, %* [
+proc loadFilters*(chatId: string, filterId: string = "", symKeyId: string = "", oneToOne: bool = false, identity: string = "", topic: string = "", discovery: bool = false, negotiated: bool = false, listen: bool = true): string =
+  result =  callPrivateRPC("loadFilters".prefix, %* [
     [{
       "ChatID": chatId, # identifier of the chat
       "FilterID": filterId, # whisper filter id generated
@@ -27,6 +30,7 @@ proc saveChat*(chatId: string, oneToOne = false) =
       "active": true,
       "id": chatId,
       "unviewedMessagesCount": 0,
+      # TODO use constants for those too or use the Date
       "chatType":  if oneToOne: 1 else: 2,
       "timestamp": 1588940692659
     }
@@ -35,6 +39,27 @@ proc saveChat*(chatId: string, oneToOne = false) =
 proc chatMessages*(chatId: string) =
   discard callPrivateRPC("chatMessages".prefix, %* [chatId, nil, 20])
 
+# TODO this probably belongs in another file
+proc generateSymKeyFromPassword*(): string =
+  result = ($parseJson(callPrivateRPC("waku_generateSymKeyFromPassword", %* [
+    # TODO unhardcode this for non-status mailservers
+    "status-offline-inbox"
+  ]))["result"]).strip(chars = {'"'})
+
+proc requestMessages*(topics: seq[string], symKeyID: string, peer: string, numberOfMessages: int) =
+  discard callPrivateRPC("requestMessages".prefix, %* [
+    {
+        "topics": topics,
+        "mailServerPeer": peer,
+        "symKeyID": symKeyID,
+        "timeout": 30,
+        "limit": numberOfMessages,
+        "cursor": nil,
+        "from": times.toUnix(times.getTime()) - 30000 # Unhardcode this. Need to keep the last fetch in a DB
+    }
+  ])
+
+
 proc sendChatMessage*(chatId: string, msg: string): string =
   callPrivateRPC("sendChatMessage".prefix, %* [
     {