Move logging into a database.

app/src/main/java/org/thoughtcrime/securesms/migrations/ApplicationMigrations.java

@@ -78,9 +78,10 @@ public class ApplicationMigrations {
     static final int SENDER_KEY_2           = 36;
     static final int DB_AUTOINCREMENT       = 37;
     static final int ATTACHMENT_CLEANUP     = 38;
+    static final int LOG_CLEANUP            = 39;
   }
 
-  public static final int CURRENT_VERSION = 38;
+  public static final int CURRENT_VERSION = 39;
 
   /**
    * This *must* be called after the {@link JobManager} has been instantiated, but *before* the call
@@ -342,6 +343,10 @@ public class ApplicationMigrations {
       jobs.put(Version.ATTACHMENT_CLEANUP, new AttachmentCleanupMigrationJob());
     }
 
+    if (lastSeenVersion < Version.LOG_CLEANUP) {
+      jobs.put(Version.LOG_CLEANUP, new DeleteDeprecatedLogsMigrationJob());
+    }
+
     return jobs;
   }
 

app/src/main/java/org/thoughtcrime/securesms/migrations/DeleteDeprecatedLogsMigrationJob.java

@@ -0,0 +1,72 @@
+package org.thoughtcrime.securesms.migrations;
+
+import androidx.annotation.NonNull;
+
+import org.signal.core.util.logging.Log;
+import org.thoughtcrime.securesms.jobmanager.Data;
+import org.thoughtcrime.securesms.jobmanager.Job;
+
+import java.io.File;
+
+/**
+ * We moved from storing logs in encrypted files to just storing them in an encrypted database. So we need to delete the leftover files.
+ */
+public class DeleteDeprecatedLogsMigrationJob extends MigrationJob {
+
+  private static final String TAG = Log.tag(DeleteDeprecatedLogsMigrationJob.class);
+
+  public static final String KEY = "DeleteDeprecatedLogsMigrationJob";
+
+  public DeleteDeprecatedLogsMigrationJob() {
+    this(new Parameters.Builder().build());
+  }
+
+  private DeleteDeprecatedLogsMigrationJob(@NonNull Parameters parameters) {
+    super(parameters);
+  }
+
+  @Override
+  public @NonNull String getFactoryKey() {
+    return KEY;
+  }
+
+  @Override
+  boolean isUiBlocking() {
+    return false;
+  }
+
+  @Override
+  void performMigration() {
+    File logDir = new File(context.getCacheDir(), "log");
+    if (logDir.exists()) {
+      File[] files = logDir.listFiles();
+
+      int count = 0;
+      if (files != null) {
+        for (File f : files) {
+          count += f.delete() ? 1 : 0;
+        }
+      }
+
+      if (!logDir.delete()) {
+        Log.w(TAG, "Failed to delete log directory.");
+      }
+
+      Log.i(TAG, "Deleted " + count + " log files.");
+    } else {
+      Log.w(TAG, "Log directory does not exist.");
+    }
+  }
+
+  @Override
+  boolean shouldRetry(@NonNull Exception e) {
+    return false;
+  }
+
+  public static final class Factory implements Job.Factory<DeleteDeprecatedLogsMigrationJob> {
+    @Override
+    public @NonNull DeleteDeprecatedLogsMigrationJob create(@NonNull Parameters parameters, @NonNull Data data) {
+      return new DeleteDeprecatedLogsMigrationJob(parameters);
+    }
+  }
+}