core/bt: match DC descriptor in lower case

This fixes a rather subtle bug.

In btdiscovery.cpp we are detecting dive computers based on their BT name and
are setting up product+vendor as the key for that lookup. QMap always uses case
sensitive comparisons and a tiny inconsistency snuck into our code.
libdivecomputer names for the Aqualung dive computers i200C / i300C / i550C end
in an upper case C (as matches the official branding), but in btdiscovery.cpp
we have those names with lower case c. And therefore didn't recognize these
dive computers.

Obviously this is easy to fix by fixing those three strings, but I decided that
it was silly to set ourselves up for similar oversights in the future. So
instead I switched the matching of the descriptor to simply be allways all
lower case.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

5 files changed, 13 insertions, 11 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2b898fff..7e6315761 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,4 @@
+Mobile: fix failure to recognize several Aqualung BLE dive computers
 Mobile: show dive tags on dive details page
 Desktop: update SAC fields and other statistics when editing cylinders
 Desktop: Reconnect the variations checkbox in planner
diff --git a/core/btdiscovery.cpp b/core/btdiscovery.cpp
index b70330410..298c0408c 100644
--- a/core/btdiscovery.cpp
+++ b/core/btdiscovery.cpp
@@ -83,16 +83,16 @@ static dc_descriptor_t *getDeviceType(QString btName)
 		// number. The model code matches the hex model (so "FQ" is 0x4651,
 		// where 'F' is 46h and 'Q' is 51h in ASCII).
 		vendor = "Aqualung";
-		product = "i200c";
+		product = "i200C";
 	} else if (btName.contains(QRegularExpression("^FH\\d{6}$"))) {
 		vendor = "Aqualung";
-		product = "i300c";
+		product = "i300C";
 	} else if (btName.contains(QRegularExpression("^FQ\\d{6}$"))) {
 		vendor = "Aqualung";
 		product = "i770R";
 	} else if (btName.contains(QRegularExpression("^FR\\d{6}$"))) {
 		vendor = "Aqualung";
-		product = "i550c";
+		product = "i550C";
 	} else if (btName.contains(QRegularExpression("^ER\\d{6}$"))) {
 		vendor = "Oceanic";
 		product = "Pro Plus X";
@@ -111,7 +111,7 @@ static dc_descriptor_t *getDeviceType(QString btName)
 
 	// check if we found a known dive computer
 	if (!vendor.isEmpty() && !product.isEmpty()) {
-		dc_descriptor_t *lookup = descriptorLookup.value(vendor + product);
+		dc_descriptor_t *lookup = descriptorLookup.value(vendor.toLower() + product.toLower());
 		if (!lookup)
 			qWarning("known dive computer %s not found in descriptorLookup", qPrintable(QString(vendor + product)));
 		return lookup;
diff --git a/core/downloadfromdcthread.cpp b/core/downloadfromdcthread.cpp
index 8a3365842..d8a65c809 100644
--- a/core/downloadfromdcthread.cpp
+++ b/core/downloadfromdcthread.cpp
@@ -68,7 +68,7 @@ DownloadThread::DownloadThread() : downloadTable({ 0 }),
 void DownloadThread::run()
 {
 	auto internalData = m_data->internalData();
-	internalData->descriptor = descriptorLookup[m_data->vendor() + m_data->product()];
+	internalData->descriptor = descriptorLookup[m_data->vendor().toLower() + m_data->product().toLower()];
 	internalData->download_table = &downloadTable;
 	internalData->sites = &diveSiteTable;
 	internalData->btname = strdup(m_data->devBluetoothName().toUtf8());
@@ -127,7 +127,7 @@ void fill_computer_list()
 		if (!productList[vendor].contains(product))
 			productList[vendor].append(product);
 
-		descriptorLookup[QString(vendor) + QString(product)] = descriptor;
+		descriptorLookup[QString(vendor).toLower() + QString(product).toLower()] = descriptor;
 	}
 	dc_iterator_free(iterator);
 	Q_FOREACH (QString vendor, vendorList) {
@@ -157,7 +157,8 @@ void fill_computer_list()
 	if (!productList["Uemis"].contains("Zurich"))
 		productList["Uemis"].push_back("Zurich");
 
-	descriptorLookup["UemisZurich"] = (dc_descriptor_t *)mydescriptor;
+	// note: keys in the descriptorLookup are always lowercase
+	descriptorLookup["uemiszurich"] = (dc_descriptor_t *)mydescriptor;
 #endif
 
 	std::sort(vendorList.begin(), vendorList.end());
@@ -192,7 +193,7 @@ void show_computer_list()
 	Q_FOREACH (QString vendor, vendorList) {
 		QString msg = vendor + ": ";
 		Q_FOREACH (QString product, productList[vendor]) {
-			dc_descriptor_t *descriptor = descriptorLookup[vendor + product];
+			dc_descriptor_t *descriptor = descriptorLookup[vendor.toLower() + product.toLower()];
 			unsigned int transport = dc_descriptor_get_transports(descriptor) & transportMask;
 			QString transportString = getTransportString(transport);
 			msg += product + " (" + transportString + "), ";
diff --git a/desktop-widgets/configuredivecomputerdialog.cpp b/desktop-widgets/configuredivecomputerdialog.cpp
index 2315f47ea..6fd855648 100644
--- a/desktop-widgets/configuredivecomputerdialog.cpp
+++ b/desktop-widgets/configuredivecomputerdialog.cpp
@@ -908,7 +908,7 @@ void ConfigureDiveComputerDialog::getDeviceData()
 	device_data.vendor = copy_qstring(selected_vendor);
 	device_data.product = copy_qstring(selected_product);
 
-	device_data.descriptor = descriptorLookup.value(selected_vendor + selected_product);
+	device_data.descriptor = descriptorLookup.value(selected_vendor.toLower() + selected_product.toLower());
 	device_data.deviceid = device_data.diveid = 0;
 
 	qPrefDiveComputer::set_device(device_data.devname);
diff --git a/desktop-widgets/downloadfromdivecomputer.cpp b/desktop-widgets/downloadfromdivecomputer.cpp
index cf3aad492..3c84683af 100644
--- a/desktop-widgets/downloadfromdivecomputer.cpp
+++ b/desktop-widgets/downloadfromdivecomputer.cpp
@@ -318,7 +318,7 @@ void DownloadFromDCWidget::on_vendor_currentIndexChanged(const QString &vendor)
 	productModel.setStringList(productList[vendor]);
 	ui.product->setCurrentIndex(0);
 
-	descriptor = descriptorLookup.value(ui.vendor->currentText() + ui.product->currentText());
+	descriptor = descriptorLookup.value(ui.vendor->currentText().toLower() + ui.product->currentText().toLower());
 	transport = dc_descriptor_get_transports(descriptor);
 	fill_device_list(transport);
 }
@@ -542,7 +542,7 @@ void DownloadFromDCWidget::updateDeviceEnabled()
 {
 	// Set up the DC descriptor
 	dc_descriptor_t *descriptor = NULL;
-	descriptor = descriptorLookup.value(ui.vendor->currentText() + ui.product->currentText());
+	descriptor = descriptorLookup.value(ui.vendor->currentText().toLower() + ui.product->currentText().toLower());
 
 	// call dc_descriptor_get_transport to see if the dc_transport_t is DC_TRANSPORT_SERIAL
 	if (dc_descriptor_get_transports(descriptor) & (DC_TRANSPORT_SERIAL | DC_TRANSPORT_USBSTORAGE)) {