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Read older messages #5

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134 changes: 112 additions & 22 deletions lib/src/utils/messenger/messages_util.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -128,42 +128,44 @@ mixin MessagesMixin {
int limit = 0,
int pagingOffset = 0,
}) async {
final messagesList = await apiService.getTransactionInputs(
[discussionSCAddress],
final transactions = await _listTransactions(
apiService: apiService,
discussionSCAddress: discussionSCAddress,
);

final txContentMessageAddressesToTransactionAddress =
await _txContentMessageAddressesToTransactionAddress(
apiService: apiService,
transactions: transactions,
limit: limit,
pagingOffset: pagingOffset,
);
final txContentMessagesList =
messagesList[discussionSCAddress] ?? <TransactionInput>[];
final txContentMessagesAddresses = txContentMessagesList
.where(
(txContentMessage) =>
txContentMessage.from != null && txContentMessage.type == 'call',
)
.map((txContentMessage) => txContentMessage.from)
.whereType<String>()
.toList();

final aeMessages = <AEMessage>[];
final contents = await apiService.getTransaction(
txContentMessagesAddresses,
txContentMessageAddressesToTransactionAddress.keys.toList(),
request:
' address, chainLength, data { content }, previousPublicKey, validationStamp { timestamp } ',
);

if (contents.isEmpty) return [];

final discussionKeyAccess = uint8ListToHex(
await DiscussionUtil().getDiscussionKeyAccess(
apiService: apiService,
discussionSCAddress: discussionSCAddress,
keyPair: readerKeyPair,
),
);
for (final contentMessageAddress
in txContentMessageAddressesToTransactionAddress.keys.toList()) {
final discussionKeyAccess = uint8ListToHex(
await DiscussionUtil().getDiscussionKeyAccess(
apiService: apiService,
discussionSCAddress: txContentMessageAddressesToTransactionAddress[
contentMessageAddress]!,
keyPair: readerKeyPair,
),
);

for (final contentMessageAddress in txContentMessagesAddresses) {
final contentMessageTransaction = contents[contentMessageAddress];
if (contentMessageTransaction == null) continue;
if (contentMessageTransaction?.data?.content == null ||
contentMessageTransaction!.data!.content!.isEmpty) {
continue;
}

final transactionContentIM = TransactionContentMessaging.fromJson(
jsonDecode(contentMessageTransaction.data!.content!),
Expand Down Expand Up @@ -210,6 +212,94 @@ mixin MessagesMixin {

return aeMessages;
}

Future<List<Transaction>> _listTransactions({
required ApiService apiService,
required String discussionSCAddress,
}) async {
final listTransactions = <Transaction>[];

final transactionChain = await apiService.getTransactionChain(
{discussionSCAddress: ''},
orderAsc: false,
);

if (transactionChain[discussionSCAddress] != null) {
listTransactions.addAll(transactionChain[discussionSCAddress]!.toList());
}

return listTransactions;
}

Future<Map<String, String>> _txContentMessageAddressesToTransactionAddress({
required ApiService apiService,
required List<Transaction> transactions,
int limit = 0,
int pagingOffset = 0,
}) async {
final txContentMessageAddressesToTransactionAddress = <String, String>{};
for (final transaction in transactions) {
final transactionAddress = transaction.address?.address;

if (transactionAddress == null) {
continue;
}

var bufPagingOffset = pagingOffset;
var bufTxContentMessageAddresses = <String>[];
do {
bufTxContentMessageAddresses = await _messagesAddresses(
apiService: apiService,
discussionSCAddress: transactionAddress,
limit: limit,
pagingOffset: bufPagingOffset,
);

for (final txContentMessageAddress in bufTxContentMessageAddresses) {
txContentMessageAddressesToTransactionAddress[
txContentMessageAddress] = transactionAddress;
}
bufPagingOffset += limit;
} while (txContentMessageAddressesToTransactionAddress.length < limit &&
bufTxContentMessageAddresses.isNotEmpty);

if (txContentMessageAddressesToTransactionAddress.length >= limit) {
break;
}
}
return txContentMessageAddressesToTransactionAddress;
}

Future<List<String>> _messagesAddresses({
required ApiService apiService,
required String discussionSCAddress,
int limit = 0,
int pagingOffset = 0,
}) async {
final messagesList = await apiService.getTransactionInputs(
[discussionSCAddress],
limit: limit,
pagingOffset: pagingOffset,
);

final txContentMessagesList =
messagesList[discussionSCAddress] ?? <TransactionInput>[];
final messageTransactions = txContentMessagesList
.where(
(txContentMessage) =>
txContentMessage.from != null && txContentMessage.type == 'call',
)
.map((txContentMessage) => txContentMessage.from)
.whereType<String>()
.toList();
final contents = await apiService.getTransaction(
messageTransactions,
request:
' address, chainLength, data { content }, previousPublicKey, validationStamp { timestamp } ',
);

return messageTransactions;
}
}

class DiscussionUtil with DiscussionMixin {}