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Check if file really exists before asking user to overwrite it

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Stypox 2021-03-17 20:28:15 +01:00
parent b78ac7d2e9
commit 21b8df0375
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3 changed files with 30 additions and 16 deletions
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22
app/src/main/java/us/shandian/giga/service/DownloadManager.java
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@ -106,7 +106,8 @@ public class DownloadManager {
}
/**
* Loads finished missions from the data source
* Loads finished missions from the data source and forgets finished missions whose file does
* not exist anymore.
*/
private ArrayList<FinishedMission> loadFinishedMissions() {
ArrayList<FinishedMission> finishedMissions = mFinishedMissionStore.loadFinishedMissions();
@ -331,14 +332,29 @@ public class DownloadManager {
}
/**
* Get a finished mission by its path
* Get the index into {@link #mMissionsFinished} of a finished mission by its path, return
* {@code -1} if there is no such mission. This function also checks if the matched mission's
* file exists, and, if it does not, the related mission is forgotten about (like in {@link
* #loadFinishedMissions()}) and {@code -1} is returned.
*
* @param storage where the file possible is stored
* @param storage where the file would be stored
* @return the mission index or -1 if no such mission exists
*/
private int getFinishedMissionIndex(StoredFileHelper storage) {
for (int i = 0; i < mMissionsFinished.size(); i++) {
if (mMissionsFinished.get(i).storage.equals(storage)) {
// If the file does not exist the mission is not valid anymore. Also checking if
// length == 0 since the file picker may create an empty file before yielding it,
// but that does not mean the file really belonged to a previous mission.
if (!storage.existsAsFile() || storage.length() == 0) {
if (DEBUG) {
Log.d(TAG, "matched downloaded file removed: " + storage.getName());
}
mFinishedMissionStore.deleteMission(mMissionsFinished.get(i));
mMissionsFinished.remove(i);
return -1; // finished mission whose associated file was removed
}
return i;
}
}