Add decryption error messages to translations

resources/langs/nheko_de.ts

@@ -415,6 +415,36 @@
         <source>Encryption is enabled</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <location line="+65"/>
+        <source>-- Encrypted Event (No keys found for decryption) --</source>
+        <comment>Placeholder, when the message was not decrypted yet or can&apos;t be decrypted</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+15"/>
+        <source>-- Decryption Error (failed to communicate with DB) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed when trying to lookup the session.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+19"/>
+        <source>-- Decryption Error (failed to retrieve megolm keys from db) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+12"/>
+        <source>-- Decryption Error (%1) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted. In this case, the Olm decrytion returned an error, which is passed ad %1</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+27"/>
+        <source>-- Encrypted Event (Unknown event type) --</source>
+        <comment>Placeholder, when the message was decrypted, but we couldn&apos;t parse it, because Nheko/mtxclient don&apos;t support that event type yet</comment>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>TopRoomBar</name>

resources/langs/nheko_el.ts

@@ -415,6 +415,36 @@
         <source>Encryption is enabled</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <location line="+65"/>
+        <source>-- Encrypted Event (No keys found for decryption) --</source>
+        <comment>Placeholder, when the message was not decrypted yet or can&apos;t be decrypted</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+15"/>
+        <source>-- Decryption Error (failed to communicate with DB) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed when trying to lookup the session.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+19"/>
+        <source>-- Decryption Error (failed to retrieve megolm keys from db) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+12"/>
+        <source>-- Decryption Error (%1) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted. In this case, the Olm decrytion returned an error, which is passed ad %1</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+27"/>
+        <source>-- Encrypted Event (Unknown event type) --</source>
+        <comment>Placeholder, when the message was decrypted, but we couldn&apos;t parse it, because Nheko/mtxclient don&apos;t support that event type yet</comment>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>TopRoomBar</name>

resources/langs/nheko_en.ts

@@ -415,6 +415,36 @@
         <source>Encryption is enabled</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <location line="+65"/>
+        <source>-- Encrypted Event (No keys found for decryption) --</source>
+        <comment>Placeholder, when the message was not decrypted yet or can&apos;t be decrypted</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+15"/>
+        <source>-- Decryption Error (failed to communicate with DB) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed when trying to lookup the session.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+19"/>
+        <source>-- Decryption Error (failed to retrieve megolm keys from db) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+12"/>
+        <source>-- Decryption Error (%1) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted. In this case, the Olm decrytion returned an error, which is passed ad %1</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+27"/>
+        <source>-- Encrypted Event (Unknown event type) --</source>
+        <comment>Placeholder, when the message was decrypted, but we couldn&apos;t parse it, because Nheko/mtxclient don&apos;t support that event type yet</comment>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>TopRoomBar</name>

resources/langs/nheko_fi.ts

@@ -415,6 +415,36 @@
         <source>Encryption is enabled</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <location line="+65"/>
+        <source>-- Encrypted Event (No keys found for decryption) --</source>
+        <comment>Placeholder, when the message was not decrypted yet or can&apos;t be decrypted</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+15"/>
+        <source>-- Decryption Error (failed to communicate with DB) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed when trying to lookup the session.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+19"/>
+        <source>-- Decryption Error (failed to retrieve megolm keys from db) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+12"/>
+        <source>-- Decryption Error (%1) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted. In this case, the Olm decrytion returned an error, which is passed ad %1</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+27"/>
+        <source>-- Encrypted Event (Unknown event type) --</source>
+        <comment>Placeholder, when the message was decrypted, but we couldn&apos;t parse it, because Nheko/mtxclient don&apos;t support that event type yet</comment>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>TopRoomBar</name>

resources/langs/nheko_fr.ts

@@ -416,6 +416,36 @@
         <source>Encryption is enabled</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <location line="+65"/>
+        <source>-- Encrypted Event (No keys found for decryption) --</source>
+        <comment>Placeholder, when the message was not decrypted yet or can&apos;t be decrypted</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+15"/>
+        <source>-- Decryption Error (failed to communicate with DB) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed when trying to lookup the session.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+19"/>
+        <source>-- Decryption Error (failed to retrieve megolm keys from db) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+12"/>
+        <source>-- Decryption Error (%1) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted. In this case, the Olm decrytion returned an error, which is passed ad %1</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+27"/>
+        <source>-- Encrypted Event (Unknown event type) --</source>
+        <comment>Placeholder, when the message was decrypted, but we couldn&apos;t parse it, because Nheko/mtxclient don&apos;t support that event type yet</comment>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>TopRoomBar</name>

resources/langs/nheko_nl.ts

@@ -415,6 +415,36 @@
         <source>Encryption is enabled</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <location line="+65"/>
+        <source>-- Encrypted Event (No keys found for decryption) --</source>
+        <comment>Placeholder, when the message was not decrypted yet or can&apos;t be decrypted</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+15"/>
+        <source>-- Decryption Error (failed to communicate with DB) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed when trying to lookup the session.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+19"/>
+        <source>-- Decryption Error (failed to retrieve megolm keys from db) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+12"/>
+        <source>-- Decryption Error (%1) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted. In this case, the Olm decrytion returned an error, which is passed ad %1</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+27"/>
+        <source>-- Encrypted Event (Unknown event type) --</source>
+        <comment>Placeholder, when the message was decrypted, but we couldn&apos;t parse it, because Nheko/mtxclient don&apos;t support that event type yet</comment>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>TopRoomBar</name>

resources/langs/nheko_pl.ts

@@ -415,6 +415,36 @@
         <source>Encryption is enabled</source>
         <translation>Szyfrowanie jest włączone</translation>
     </message>
+    <message>
+        <location line="+65"/>
+        <source>-- Encrypted Event (No keys found for decryption) --</source>
+        <comment>Placeholder, when the message was not decrypted yet or can&apos;t be decrypted</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+15"/>
+        <source>-- Decryption Error (failed to communicate with DB) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed when trying to lookup the session.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+19"/>
+        <source>-- Decryption Error (failed to retrieve megolm keys from db) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+12"/>
+        <source>-- Decryption Error (%1) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted. In this case, the Olm decrytion returned an error, which is passed ad %1</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+27"/>
+        <source>-- Encrypted Event (Unknown event type) --</source>
+        <comment>Placeholder, when the message was decrypted, but we couldn&apos;t parse it, because Nheko/mtxclient don&apos;t support that event type yet</comment>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>TopRoomBar</name>

resources/langs/nheko_ru.ts

@@ -415,6 +415,36 @@
         <source>Encryption is enabled</source>
         <translation>Шифрование включено</translation>
     </message>
+    <message>
+        <location line="+65"/>
+        <source>-- Encrypted Event (No keys found for decryption) --</source>
+        <comment>Placeholder, when the message was not decrypted yet or can&apos;t be decrypted</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+15"/>
+        <source>-- Decryption Error (failed to communicate with DB) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed when trying to lookup the session.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+19"/>
+        <source>-- Decryption Error (failed to retrieve megolm keys from db) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+12"/>
+        <source>-- Decryption Error (%1) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted. In this case, the Olm decrytion returned an error, which is passed ad %1</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+27"/>
+        <source>-- Encrypted Event (Unknown event type) --</source>
+        <comment>Placeholder, when the message was decrypted, but we couldn&apos;t parse it, because Nheko/mtxclient don&apos;t support that event type yet</comment>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>TopRoomBar</name>

resources/langs/nheko_zh_CN.ts

@@ -415,6 +415,36 @@
         <source>Encryption is enabled</source>
         <translation>加密已启用</translation>
     </message>
+    <message>
+        <location line="+65"/>
+        <source>-- Encrypted Event (No keys found for decryption) --</source>
+        <comment>Placeholder, when the message was not decrypted yet or can&apos;t be decrypted</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+15"/>
+        <source>-- Decryption Error (failed to communicate with DB) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed when trying to lookup the session.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+19"/>
+        <source>-- Decryption Error (failed to retrieve megolm keys from db) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted, because the DB access failed.</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+12"/>
+        <source>-- Decryption Error (%1) --</source>
+        <comment>Placeholder, when the message can&apos;t be decrypted. In this case, the Olm decrytion returned an error, which is passed ad %1</comment>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location line="+27"/>
+        <source>-- Encrypted Event (Unknown event type) --</source>
+        <comment>Placeholder, when the message was decrypted, but we couldn&apos;t parse it, because Nheko/mtxclient don&apos;t support that event type yet</comment>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>TopRoomBar</name>

src/timeline/TimelineView.cpp

@@ -306,7 +306,10 @@ TimelineView::parseEncryptedEvent(const mtx::events::EncryptedEvent<mtx::events:
         dummy.origin_server_ts = e.origin_server_ts;
         dummy.event_id         = e.event_id;
         dummy.sender           = e.sender;
-        dummy.content.body     = "-- Encrypted Event (No keys found for decryption) --";
+        dummy.content.body =
+          tr("-- Encrypted Event (No keys found for decryption) --",
+             "Placeholder, when the message was not decrypted yet or can't be decrypted")
+            .toStdString();
 
         try {
                 if (!cache::client()->inboundMegolmSessionExists(index)) {
@@ -319,7 +322,10 @@ TimelineView::parseEncryptedEvent(const mtx::events::EncryptedEvent<mtx::events:
                 }
         } catch (const lmdb::error &e) {
                 nhlog::db()->critical("failed to check megolm session's existence: {}", e.what());
-                dummy.content.body = "-- Decryption Error (failed to communicate with DB) --";
+                dummy.content.body = tr("-- Decryption Error (failed to communicate with DB) --",
+                                        "Placeholder, when the message can't be decrypted, because "
+                                        "the DB access failed when trying to lookup the session.")
+                                       .toStdString();
                 return {dummy, false};
         }
 
@@ -335,7 +341,10 @@ TimelineView::parseEncryptedEvent(const mtx::events::EncryptedEvent<mtx::events:
                                       index.sender_key,
                                       e.what());
                 dummy.content.body =
-                  "-- Decryption Error (failed to retrieve megolm keys from db) --";
+                  tr("-- Decryption Error (failed to retrieve megolm keys from db) --",
+                     "Placeholder, when the message can't be decrypted, because the DB access "
+                     "failed.")
+                    .toStdString();
                 return {dummy, false};
         } catch (const mtx::crypto::olm_exception &e) {
                 nhlog::crypto()->critical("failed to decrypt message with index ({}, {}, {}): {}",
@@ -343,7 +352,12 @@ TimelineView::parseEncryptedEvent(const mtx::events::EncryptedEvent<mtx::events:
                                           index.session_id,
                                           index.sender_key,
                                           e.what());
-                dummy.content.body = "-- Decryption Error (" + std::string(e.what()) + ") --";
+                dummy.content.body =
+                  tr("-- Decryption Error (%1) --",
+                     "Placeholder, when the message can't be decrypted. In this case, the Olm "
+                     "decrytion returned an error, which is passed ad %1")
+                    .arg(e.what())
+                    .toStdString();
                 return {dummy, false};
         }
 
@@ -365,7 +379,11 @@ TimelineView::parseEncryptedEvent(const mtx::events::EncryptedEvent<mtx::events:
         if (events.size() == 1)
                 return {events.at(0), true};
 
-        dummy.content.body = "-- Encrypted Event (Unknown event type) --";
+        dummy.content.body =
+          tr("-- Encrypted Event (Unknown event type) --",
+             "Placeholder, when the message was decrypted, but we couldn't parse it, because "
+             "Nheko/mtxclient don't support that event type yet")
+            .toStdString();
         return {dummy, false};
 }