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fix backup creation for older installations 

if your Conversations installation is older than December 2016 (version 1.15.0) the backup would
include historic data that a current installation is not able to read on restore.
This commits excludes that data from the backup.
If you had problems importing the backup you need to create a new backup after this patch
This commit is contained in:
Daniel Gultsch 2019-03-07 09:08:32 +01:00
parent 016e394897
commit 46596e8652
1 changed files with 14 additions and 4 deletions
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18
src/main/java/eu/siacs/conversations/services/ExportBackupService.java
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@ -145,25 +145,32 @@ public class ExportBackupService extends Service {
return cursorToString(tablename, cursor, max, false);
}
private static String cursorToString(String tablename, Cursor cursor, int max, boolean ignore) {
private static String cursorToString(final String tablename, final Cursor cursor, int max, boolean ignore) {
final boolean identities = SQLiteAxolotlStore.IDENTITIES_TABLENAME.equals(tablename);
StringBuilder builder = new StringBuilder();
builder.append("INSERT ");
if (ignore) {
builder.append("OR IGNORE ");
}
builder.append("INTO ").append(tablename).append("(");
int skipColumn = -1;
for (int i = 0; i < cursor.getColumnCount(); ++i) {
final String name = cursor.getColumnName(i);
if (identities && SQLiteAxolotlStore.TRUSTED.equals(name)) {
skipColumn = i;
continue;
}
if (i != 0) {
builder.append(',');
}
builder.append(cursor.getColumnName(i));
builder.append(name);
}
builder.append(") VALUES");
for (int i = 0; i < max; ++i) {
if (i != 0) {
builder.append(',');
}
appendValues(cursor, builder);
appendValues(cursor, builder, skipColumn);
if (i < max - 1 && !cursor.moveToNext()) {
break;
}
@ -173,9 +180,12 @@ public class ExportBackupService extends Service {
return builder.toString();
}
private static void appendValues(Cursor cursor, StringBuilder builder) {
private static void appendValues(final Cursor cursor, final StringBuilder builder, final int skipColumn) {
builder.append("(");
for (int i = 0; i < cursor.getColumnCount(); ++i) {
if (i == skipColumn) {
continue;
}
if (i != 0) {
builder.append(',');
}