Enter DownloadState::Status

The binary flag DownloadState::paused was replaced with a richer
DownloadState::status but the old logic of distinguishing only
between active and paused downloads still remains.

src/contentmanager.cpp

@@ -379,7 +379,7 @@ ContentManager::BookInfo ContentManager::getBookInfos(QString id, const QStringL
 ContentManager::BookState ContentManager::getBookState(QString bookId)
 {
     if ( const auto downloadState = DownloadManager::getDownloadState(bookId) ) {
-        return downloadState->paused
+        return downloadState->status == DownloadState::PAUSED
              ? BookState::DOWNLOAD_PAUSED
              : BookState::DOWNLOADING;
              // TODO: a download may be in error state

src/contentmanagerdelegate.cpp

@@ -131,7 +131,7 @@ void showDownloadProgress(QPainter *painter, QRect box, const DownloadState& dow
     auto completedLength = downloadInfo.completedLength;
     auto downloadSpeed = downloadInfo.downloadSpeed;
 
-    if (downloadInfo.paused) {
+    if (downloadInfo.status == DownloadState::PAUSED) {
         createResumeSymbol(painter, dcl.pauseResumeButtonRect);
         createCancelButton(painter, dcl.cancelButtonRect);
     } else {

src/downloadmanagement.cpp

@@ -26,6 +26,15 @@ QString convertToUnits(double bytes)
     return preciseBytes + " " + units[unitIndex];
 }
 
+DownloadState::Status getDownloadStatus(QString status)
+{
+    if ( status == "active" )    return DownloadState::DOWNLOADING;
+    if ( status == "paused" )    return DownloadState::PAUSED;
+    if ( status == "waiting" )   return DownloadState::WAITING;
+    if ( status == "error" )     return DownloadState::DOWNLOAD_ERROR;
+    return DownloadState::UNKNOWN;
+}
+
 } // unnamed namespace
 
 void DownloadState::update(const DownloadInfo& downloadInfos)
@@ -35,8 +44,8 @@ void DownloadState::update(const DownloadInfo& downloadInfos)
     percent = QString::number(percent, 'g', 3).toDouble();
     auto completedLength = convertToUnits(downloadInfos["completedLength"].toDouble());
     auto downloadSpeed = convertToUnits(downloadInfos["downloadSpeed"].toDouble()) + "/s";
-    const bool paused = downloadInfos["status"] == "paused";
-    *this = {percent, completedLength, downloadSpeed, paused};
+    const auto status = getDownloadStatus(downloadInfos["status"].toString());
+    *this = {percent, completedLength, downloadSpeed, status};
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -85,7 +94,7 @@ void DownloadManager::restoreDownloads()
         const kiwix::Book& book = mp_library->getBookById(bookId);
         if ( ! book.getDownloadId().empty() ) {
             const auto newDownload = std::make_shared<DownloadState>();
-            newDownload->paused = true;
+            newDownload->status = DownloadState::UNKNOWN;
             m_downloads.set(bookId, newDownload);
         }
     }

src/downloadmanagement.h

@@ -19,10 +19,18 @@ typedef QMap<QString, QVariant> DownloadInfo;
 class DownloadState
 {
 public:
+    enum Status {
+        UNKNOWN,
+        WAITING,
+        DOWNLOAD_ERROR,
+        DOWNLOADING,
+        PAUSED
+    };
+
     double progress = 0;
     QString completedLength;
     QString downloadSpeed;
-    bool paused = false;
+    Status status = UNKNOWN;
 
 public:
     void update(const DownloadInfo& info);