Merge pull request #8872 from DonLakeFlyer/CompInfoParameterMetaData

COMPONENT_INFORMATION work

qgroundcontrol.pro

@@ -644,6 +644,7 @@ HEADERS += \
     src/QGCQGeoCoordinate.h \
     src/QGCTemporaryFile.h \
     src/QGCToolbox.h \
+    src/QGCZlib.h \
     src/QmlControls/AppMessages.h \
     src/QmlControls/EditPositionDialogController.h \
     src/QmlControls/FlightPathSegment.h \
@@ -859,6 +860,7 @@ SOURCES += \
     src/QGCQGeoCoordinate.cc \
     src/QGCTemporaryFile.cc \
     src/QGCToolbox.cc \
+    src/QGCZlib.cc \
     src/QmlControls/AppMessages.cc \
     src/QmlControls/EditPositionDialogController.cc \
     src/QmlControls/FlightPathSegment.cc \

qgroundcontrol.qrc

@@ -337,5 +337,7 @@
         <file alias="APMArduSubMockLink.params">src/comm/APMArduSubMockLink.params</file>
         <file alias="PX4MockLink.params">src/comm/PX4MockLink.params</file>
         <file alias="Version.MetaData.json">src/comm/MockLink.Version.MetaData.json</file>
+        <file alias="Version.MetaData.json.gz">src/comm/MockLink.Version.MetaData.json.gz</file>
+        <file alias="Parameter.MetaData.json">src/comm/MockLink.Parameter.MetaData.json</file>
     </qresource>
 </RCC>

src/FactSystem/FactMetaData.cc

@@ -84,6 +84,40 @@ const FactMetaData::AppSettingsTranslation_s FactMetaData::_rgAppSettingsTransla
     { "g",      "lbs",      FactMetaData::UnitWeight,                UnitsSettings::WeightUnitsLbs,                FactMetaData::_gramsToPunds,                        FactMetaData::_poundsToGrams },
 };
 
+const char* FactMetaData::_rgKnownTypeStrings[] = {
+    "Uint8",
+    "Int8",
+    "Uint16",
+    "Int16",
+    "Uint32",
+    "Int32",
+    "Uint64",
+    "Int64",
+    "Float",
+    "Double",
+    "String",
+    "Bool",
+    "ElapsedSeconds",
+    "Custom",
+};
+
+const  FactMetaData::ValueType_t FactMetaData::_rgKnownValueTypes[] = {
+    valueTypeUint8,
+    valueTypeInt8,
+    valueTypeUint16,
+    valueTypeInt16,
+    valueTypeUint32,
+    valueTypeInt32,
+    valueTypeUint64,
+    valueTypeInt64,
+    valueTypeFloat,
+    valueTypeDouble,
+    valueTypeString,
+    valueTypeBool,
+    valueTypeElapsedTimeInSeconds,
+    valueTypeCustom,
+};
+
 const char* FactMetaData::_decimalPlacesJsonKey =       "decimalPlaces";
 const char* FactMetaData::_nameJsonKey =                "name";
 const char* FactMetaData::_typeJsonKey =                "type";
@@ -880,44 +914,11 @@ void FactMetaData::setRawUnits(const QString& rawUnits)
 
 FactMetaData::ValueType_t FactMetaData::stringToType(const QString& typeString, bool& unknownType)
 {
-    QStringList         knownTypeStrings;
-    QList<ValueType_t>  knownTypes;
-
     unknownType = false;
 
-    knownTypeStrings << QStringLiteral("Uint8")
-                     << QStringLiteral("Int8")
-                     << QStringLiteral("Uint16")
-                     << QStringLiteral("Int16")
-                     << QStringLiteral("Uint32")
-                     << QStringLiteral("Int32")
-                     << QStringLiteral("Uint64")
-                     << QStringLiteral("Int64")
-                     << QStringLiteral("Float")
-                     << QStringLiteral("Double")
-                     << QStringLiteral("String")
-                     << QStringLiteral("Bool")
-                     << QStringLiteral("ElapsedSeconds")
-                     << QStringLiteral("Custom");
-
-    knownTypes << valueTypeUint8
-               << valueTypeInt8
-               << valueTypeUint16
-               << valueTypeInt16
-               << valueTypeUint32
-               << valueTypeInt32
-               << valueTypeUint64
-               << valueTypeInt64
-               << valueTypeFloat
-               << valueTypeDouble
-               << valueTypeString
-               << valueTypeBool
-               << valueTypeElapsedTimeInSeconds
-               << valueTypeCustom;
-
-    for (int i=0; i<knownTypeStrings.count(); i++) {
-        if (knownTypeStrings[i].compare(typeString, Qt::CaseInsensitive) == 0) {
-            return knownTypes[i];
+    for (size_t i=0; i<sizeof(_rgKnownTypeStrings)/sizeof(_rgKnownTypeStrings[0]); i++) {
+        if (typeString.compare(_rgKnownTypeStrings[i], Qt::CaseInsensitive) == 0) {
+            return _rgKnownValueTypes[i];
         }
     }
 
@@ -926,6 +927,17 @@ FactMetaData::ValueType_t FactMetaData::stringToType(const QString& typeString,
     return valueTypeDouble;
 }
 
+QString FactMetaData::typeToString(ValueType_t type)
+{
+    for (size_t i=0; i<sizeof(_rgKnownTypeStrings)/sizeof(_rgKnownTypeStrings[0]); i++) {
+        if (type == _rgKnownValueTypes[i]) {
+            return _rgKnownTypeStrings[i];
+        }
+    }
+
+    return QStringLiteral("UnknownType%1").arg(type);
+}
+
 size_t FactMetaData::typeToSize(ValueType_t type)
 {
     switch (type) {

src/FactSystem/FactMetaData.h

@@ -194,6 +194,7 @@ public:
     static const int kUnknownDecimalPlaces = -1; ///< Number of decimal places to specify is not known
 
     static ValueType_t stringToType(const QString& typeString, bool& unknownType);
+    static QString typeToString(ValueType_t type);
     static size_t typeToSize(ValueType_t type);
 
     static const char* qgcFileType;
@@ -342,6 +343,9 @@ private:
 
     static const AppSettingsTranslation_s _rgAppSettingsTranslations[];
 
+    static const char*          _rgKnownTypeStrings[];
+    static const ValueType_t    _rgKnownValueTypes[];
+
     static const char* _nameJsonKey;
     static const char* _decimalPlacesJsonKey;
     static const char* _typeJsonKey;

src/FirmwarePlugin/PX4/PX4ParameterMetaData.cc

@@ -401,7 +401,95 @@ void PX4ParameterMetaData::loadParameterFactMetaDataFile(const QString& metaData
         }
         xml.readNext();
     }
+
+#ifdef GENERATE_PARAMETER_JSON
+    _generateParameterJson();
+#endif
+}
+
+#ifdef GENERATE_PARAMETER_JSON
+void _jsonWriteLine(QFile& file, int indent, const QString& line)
+{
+    while (indent--) {
+        file.write("  ");
+    }
+    file.write(line.toLocal8Bit().constData());
+    file.write("\n");
+}
+
+void PX4ParameterMetaData::_generateParameterJson()
+{
+    qCDebug(ParameterManagerLog) << "PX4ParameterMetaData::_generateParameterJson";
+
+    int indentLevel = 0;
+    QFile jsonFile(QDir(QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation)).absoluteFilePath("parameter.json"));
+    jsonFile.open(QFile::WriteOnly | QFile::Truncate | QFile::Text);
+
+    _jsonWriteLine(jsonFile, indentLevel++, "{");
+    _jsonWriteLine(jsonFile, indentLevel, "\"version\": 1,");
+    _jsonWriteLine(jsonFile, indentLevel, "\"uid\": 1,");
+    _jsonWriteLine(jsonFile, indentLevel, "\"scope\": \"Firmware\",");
+    _jsonWriteLine(jsonFile, indentLevel++, "\"parameters\": [");
+
+    int keyIndex = 0;
+    for (const QString& paramName: _mapParameterName2FactMetaData.keys()) {
+        const FactMetaData* metaData = _mapParameterName2FactMetaData[paramName];
+        _jsonWriteLine(jsonFile, indentLevel++, "{");
+        _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"name\": \"%1\",").arg(paramName));
+        _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"type\": \"%1\",").arg(metaData->typeToString(metaData->type())));
+        if (!metaData->group().isEmpty()) {
+            _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"group\": \"%1\",").arg(metaData->group()));
+        }
+        if (!metaData->category().isEmpty()) {
+            _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"category\": \"%1\",").arg(metaData->category()));
+        }
+        if (!metaData->shortDescription().isEmpty()) {
+            QString text = metaData->shortDescription();
+            text.replace("\"", "\\\"");
+            _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"shortDescription\": \"%1\",").arg(text));
+        }
+        if (!metaData->longDescription().isEmpty()) {
+            QString text = metaData->longDescription();
+            text.replace("\"", "\\\"");
+            _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"longDescription\": \"%1\",").arg(text));
+        }
+        if (!metaData->rawUnits().isEmpty()) {
+            _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"units\": \"%1\",").arg(metaData->rawUnits()));
+        }
+        if (metaData->defaultValueAvailable()) {
+            _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"defaultValue\": %1,").arg(metaData->rawDefaultValue().toDouble()));
+        }
+        if (!qIsNaN(metaData->rawIncrement())) {
+            _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"increment\": %1,").arg(metaData->rawIncrement()));
+        }
+        if (metaData->enumValues().count()) {
+            _jsonWriteLine(jsonFile, indentLevel++, "\"values\": [");
+            for (int i=0; i<metaData->enumValues().count(); i++) {
+                _jsonWriteLine(jsonFile, indentLevel++, "{");
+                _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"value\": %1,").arg(metaData->enumValues()[i].toDouble()));
+                QString text = metaData->enumStrings()[i];
+                text.replace("\"", "\\\"");
+                _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"description\": \"%1\"").arg(text));
+                _jsonWriteLine(jsonFile, --indentLevel, QStringLiteral("}%1").arg(i == metaData->enumValues().count() - 1 ? "" : ","));
+            }
+            _jsonWriteLine(jsonFile, --indentLevel, "],");
+        }
+        if (metaData->vehicleRebootRequired()) {
+            _jsonWriteLine(jsonFile, indentLevel, "\"rebootRequired\": true,");
+        }
+        if (metaData->volatileValue()) {
+            _jsonWriteLine(jsonFile, indentLevel, "\"volatile\": true,");
+        }
+        _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"decimalPlaces\": \"%1\",").arg(metaData->decimalPlaces()));
+        _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"minValue\": %1,").arg(metaData->rawMin().toDouble()));
+        _jsonWriteLine(jsonFile, indentLevel, QStringLiteral("\"maxValue\": %1").arg(metaData->rawMax().toDouble()));
+        _jsonWriteLine(jsonFile, --indentLevel, QStringLiteral("}%1").arg(++keyIndex == _mapParameterName2FactMetaData.keys().count() ? "" : ","));
+    }
+
+    _jsonWriteLine(jsonFile, --indentLevel, "]");
+    _jsonWriteLine(jsonFile, --indentLevel, "}");
 }
+#endif
 
 FactMetaData* PX4ParameterMetaData::getMetaDataForFact(const QString& name, MAV_TYPE vehicleType)
 {

src/FirmwarePlugin/PX4/PX4ParameterMetaData.h

@@ -25,6 +25,8 @@
 
 Q_DECLARE_LOGGING_CATEGORY(PX4ParameterMetaDataLog)
 
+//#define GENERATE_PARAMETER_JSON
+
 /// Loads and holds parameter fact meta data for PX4 stack
 class PX4ParameterMetaData : public QObject
 {
@@ -52,6 +54,10 @@ private:
     QVariant _stringToTypedVariant(const QString& string, FactMetaData::ValueType_t type, bool* convertOk);
     static void _outputFileWarning(const QString& metaDataFile, const QString& error1, const QString& error2);
 
+#ifdef GENERATE_PARAMETER_JSON
+    void _generateParameterJson();
+#endif
+
     bool _parameterMetaDataLoaded;   ///< true: parameter meta data already loaded
     QMap<QString, FactMetaData*> _mapParameterName2FactMetaData; ///< Maps from a parameter name to FactMetaData
 };

src/JsonHelper.cc

@@ -225,11 +225,27 @@ bool JsonHelper::isJsonFile(const QByteArray& bytes, QJsonDocument& jsonDoc, QSt
     if (parseError.error == QJsonParseError::NoError) {
         return true;
     } else {
+        int startPos = qMax(0, parseError.offset - 100);
+        int length = qMin(bytes.count() - startPos, 200);
+        qDebug() << QStringLiteral("Json read error '%1'").arg(bytes.mid(startPos, length).constData());
         errorString = parseError.errorString();
         return false;
     }
 }
 
+bool JsonHelper::isJsonFile(const QString& fileName, QJsonDocument& jsonDoc, QString& errorString)
+{
+    QFile jsonFile(fileName);
+    if (!jsonFile.open(QFile::ReadOnly)) {
+        errorString = tr("File open failed: file:error %1 %2").arg(jsonFile.fileName()).arg(jsonFile.errorString());
+        return false;
+    }
+    QByteArray jsonBytes = jsonFile.readAll();
+    jsonFile.close();
+
+    return isJsonFile(jsonBytes, jsonDoc, errorString);
+}
+
 bool JsonHelper::validateInternalQGCJsonFile(const QJsonObject& jsonObject,
                                              const QString&     expectedFileType,
                                              int                minSupportedVersion,

src/JsonHelper.h

@@ -26,6 +26,12 @@ class JsonHelper
     Q_DECLARE_TR_FUNCTIONS(JsonHelper)
 
 public:
+    /// Determines is the specified file is a json file
+    /// @return true: file is json, false: file is not json
+    static bool isJsonFile(const QString&       fileName,       ///< filename
+                           QJsonDocument&       jsonDoc,        ///< returned json document
+                           QString&             errorString);   ///< error on parse failure
+
     /// Determines is the specified data is a json file
     /// @return true: file is json, false: file is not json
     static bool isJsonFile(const QByteArray&    bytes,          ///< json bytes

src/QGCZlib.cc

+/****************************************************************************
+ *
+ * (c) 2009-2020 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *
+ * QGroundControl is licensed according to the terms in the file
+ * COPYING.md in the root of the source code directory.
+ *
+ ****************************************************************************/
+
+#include "QGCZlib.h"
+
+#include <QFile>
+#include <QDir>
+#include <QtDebug>
+
+#include "zlib.h"
+
+bool QGCZlib::inflateGzipFile(const QString& gzippedFileName, const QString& decompressedFilename)
+{
+    bool            success                 = true;
+    int             ret;
+    const int       cBuffer                 = 1024 * 5;
+    unsigned char   inputBuffer[cBuffer];
+    unsigned char   outputBuffer[cBuffer];
+    z_stream        strm;
+
+    QFile inputFile(gzippedFileName);
+    if (!inputFile.open(QIODevice::ReadOnly)) {
+        qWarning() << "QGCZlib::inflateGzipFile: open input file failed" << gzippedFileName << inputFile.errorString();
+        return false;
+    }
+
+    QFile outputFile(decompressedFilename);
+    if (!outputFile.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
+        qWarning() << "QGCZlib::inflateGzipFile: open input file failed" << outputFile.fileName() << outputFile.errorString();
+        return false;
+    }
+
+    strm.zalloc     = nullptr;
+    strm.zfree      = nullptr;
+    strm.opaque     = nullptr;
+    strm.avail_in   = 0;
+    strm.next_in    = nullptr;
+
+    ret = inflateInit2(&strm, 16+MAX_WBITS);
+    if (ret != Z_OK) {
+        qWarning() << "QGCZlib::inflateGzipFile: inflateInit2 failed:" << ret;
+        goto Error;
+    }
+
+    do {
+        strm.avail_in = static_cast<unsigned>(inputFile.read((char*)inputBuffer, cBuffer));
+        if (strm.avail_in == 0) {
+            break;
+        }
+        strm.next_in = inputBuffer;
+
+        do {
+            strm.avail_out  = cBuffer;
+            strm.next_out   = outputBuffer;
+
+            ret = inflate(&strm, Z_NO_FLUSH);
+            if (ret != Z_OK && ret != Z_STREAM_END) {
+                qWarning() << "QGCZlib::inflateGzipFile: inflate failed:" << ret;
+                goto Error;
+            }
+
+            unsigned cBytesInflated = cBuffer - strm.avail_out;
+            qint64 cBytesWritten = outputFile.write((char*)outputBuffer, static_cast<int>(cBytesInflated));
+            if (cBytesWritten != cBytesInflated) {
+                qWarning() << "QGCZlib::inflateGzipFile: output file write failed:" << outputFile.fileName() << outputFile.errorString();
+                goto Error;
+
+            }
+        } while (strm.avail_out == 0);
+    } while (ret != Z_STREAM_END);
+
+Out:
+    inflateEnd(&strm);
+    return success;
+
+Error:
+    success = false;
+    goto Out;
+}

src/QGCZlib.h

+/****************************************************************************
+ *
+ * (c) 2009-2020 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *
+ * QGroundControl is licensed according to the terms in the file
+ * COPYING.md in the root of the source code directory.
+ *
+ ****************************************************************************/
+
+#pragma once
+
+#include <QString>
+
+class QGCZlib
+{
+public:
+    /// Decompresses the specified file to the specified directory
+    ///     @param gzipFilename         Fully qualified path to gzip file
+    ///     @param decompressedFilename Fully qualified path to for file to decompress to
+    static bool inflateGzipFile(const QString& gzippedFileName, const QString& decompressedFilename);
+};

src/Vehicle/ComponentInformationManager.cc

@@ -10,14 +10,21 @@
 #include "ComponentInformationManager.h"
 #include "Vehicle.h"
 #include "FTPManager.h"
+#include "QGCZlib.h"
+#include "JsonHelper.h"
 
 #include <QStandardPaths>
+#include <QJsonDocument>
+#include <QJsonArray>
 
 QGC_LOGGING_CATEGORY(ComponentInformationManagerLog, "ComponentInformationManagerLog")
 
+const char* ComponentInformationManager::_jsonVersionKey                    = "version";
+const char* ComponentInformationManager::_jsonSupportedCompMetadataTypesKey = "supportedCompMetadataTypes";
+
 ComponentInformationManager::StateFn ComponentInformationManager::_rgStates[]= {
     ComponentInformationManager::_stateRequestCompInfoVersion,
-    //ComponentInformationManager::_stateRequestCompInfoParam,
+    ComponentInformationManager::_stateRequestCompInfoParam,
     ComponentInformationManager::_stateRequestAllCompInfoComplete
 };
 
@@ -27,6 +34,7 @@ RequestMetaDataTypeStateMachine::StateFn RequestMetaDataTypeStateMachine::_rgSta
     RequestMetaDataTypeStateMachine::_stateRequestCompInfo,
     RequestMetaDataTypeStateMachine::_stateRequestMetaDataJson,
     RequestMetaDataTypeStateMachine::_stateRequestTranslationJson,
+    RequestMetaDataTypeStateMachine::_stateRequestComplete,
 };
 
 int RequestMetaDataTypeStateMachine::_cStates = sizeof(RequestMetaDataTypeStateMachine::_rgStates) / sizeof(RequestMetaDataTypeStateMachine::_rgStates[0]);
@@ -69,7 +77,12 @@ void ComponentInformationManager::_stateRequestCompInfoComplete(void)
 void ComponentInformationManager::_stateRequestCompInfoParam(StateMachine* stateMachine)
 {
     ComponentInformationManager* compMgr = static_cast<ComponentInformationManager*>(stateMachine);
+
+    if (compMgr->_isCompTypeSupported(COMP_METADATA_TYPE_PARAMETER)) {
         compMgr->_requestTypeStateMachine.request(COMP_METADATA_TYPE_PARAMETER);
+    } else {
+
+    }
 }
 
 void ComponentInformationManager::_stateRequestAllCompInfoComplete(StateMachine* stateMachine)
@@ -80,6 +93,41 @@ void ComponentInformationManager::_stateRequestAllCompInfoComplete(StateMachine*
     compMgr->_requestAllCompleteFnData  = nullptr;
 }
 
+void ComponentInformationManager::_compInfoJsonAvailable(const QString& metadataJsonFileName, const QString& translationsJsonFileName)
+{
+    qCDebug(ComponentInformationManagerLog) << "_compInfoJsonAvailable metadata:translation" << metadataJsonFileName << translationsJsonFileName;
+
+    if (!metadataJsonFileName.isEmpty()) {
+        QString         errorString;
+        QJsonDocument   jsonDoc;
+        if (!JsonHelper::isJsonFile(metadataJsonFileName, jsonDoc, errorString)) {
+            qCWarning(ComponentInformationManagerLog) << "Version json file read failed" << errorString;
+            return;
+        }
+        QJsonObject jsonObj = jsonDoc.object();
+
+        if (currentState() == _stateRequestCompInfoVersion) {
+            QList<JsonHelper::KeyValidateInfo> keyInfoList = {
+                { _jsonVersionKey,                      QJsonValue::Double, true },
+                { _jsonSupportedCompMetadataTypesKey,   QJsonValue::Array,  true },
+            };
+            if (!JsonHelper::validateKeys(jsonObj, keyInfoList, errorString)) {
+                qCWarning(ComponentInformationManagerLog) << "Version json validation failed:" << errorString;
+                return;
+            }
+
+            for (const QJsonValue& idValue: jsonObj[_jsonSupportedCompMetadataTypesKey].toArray()) {
+                _supportedMetaDataTypes.append(static_cast<COMP_METADATA_TYPE>(idValue.toInt()));
+            }
+        }
+    }
+}
+
+bool ComponentInformationManager::_isCompTypeSupported(COMP_METADATA_TYPE type)
+{
+    return _supportedMetaDataTypes.contains(type);
+}
+
 RequestMetaDataTypeStateMachine::RequestMetaDataTypeStateMachine(ComponentInformationManager* compMgr)
     : _compMgr(compMgr)
 {
@@ -91,6 +139,8 @@ void RequestMetaDataTypeStateMachine::request(COMP_METADATA_TYPE type)
     _compInfoAvailable  = false;
     _type               = type;
     _stateIndex         = -1;
+    _jsonMetadataFileName.clear();
+    _jsonTranslationFileName.clear();
 
     start();
 }
@@ -171,9 +221,47 @@ void RequestMetaDataTypeStateMachine::_stateRequestCompInfo(StateMachine* stateM
     }
 }
 
-void RequestMetaDataTypeStateMachine::_downloadComplete(const QString& file, const QString& errorMsg)
+QString RequestMetaDataTypeStateMachine::_downloadCompleteJsonWorker(const QString& fileName, const QString& inflatedFileName)
 {
-    qCDebug(ComponentInformationManagerLog) << "RequestMetaDataTypeStateMachine::_downloadComplete" << file << errorMsg;
+    QString outputFileName = fileName;
+
+    if (fileName.endsWith(".gz", Qt::CaseInsensitive)) {
+        outputFileName = (QDir(QStandardPaths::writableLocation(QStandardPaths::TempLocation)).absoluteFilePath(inflatedFileName));
+        if (QGCZlib::inflateGzipFile(fileName, outputFileName)) {
+            QFile(fileName).remove();
+        } else {
+            qCWarning(ComponentInformationManagerLog) << "Inflate of compressed json failed" << inflatedFileName;
+            outputFileName.clear();
+        }
+    } else {
+        outputFileName = fileName;
+    }
+
+    return outputFileName;
+}
+
+void RequestMetaDataTypeStateMachine::_downloadCompleteMetaDataJson(const QString& fileName, const QString& errorMsg)
+{
+    qCDebug(ComponentInformationManagerLog) << "RequestMetaDataTypeStateMachine::_downloadCompleteMetaDataJson fileName:errorMsg" << fileName << errorMsg;
+
+    if (errorMsg.isEmpty()) {
+        _jsonMetadataFileName = _downloadCompleteJsonWorker(fileName, "metadata.json");
+    }
+
+    advance();
+}
+
+void RequestMetaDataTypeStateMachine::_downloadCompleteTranslationJson(const QString& fileName, const QString& errorMsg)
+{
+    qCDebug(ComponentInformationManagerLog) << "RequestMetaDataTypeStateMachine::_downloadCompleteTranslationJson fileName:errorMsg" << fileName << errorMsg;
+
+    QString jsonTranslationFileName;
+    if (errorMsg.isEmpty()) {
+        jsonTranslationFileName = _downloadCompleteJsonWorker(fileName, "translation.json");
+    }
+
+    _compMgr->_compInfoJsonAvailable(_jsonMetadataFileName, jsonTranslationFileName);
+
     advance();
 }
 
@@ -186,9 +274,9 @@ void RequestMetaDataTypeStateMachine::_stateRequestMetaDataJson(StateMachine* st
     if (requestMachine->_compInfoAvailable) {
         ComponentInformation_t& compInfo = requestMachine->_compInfo;
 
-        qCDebug(ComponentInformationManagerLog) << "Downloading metadata json" << compInfo.translationURI;
+        qCDebug(ComponentInformationManagerLog) << "Downloading metadata json" << compInfo.metadataURI;
         if (_uriIsFTP(compInfo.metadataURI)) {
-            connect(ftpManager, &FTPManager::downloadComplete, requestMachine, &RequestMetaDataTypeStateMachine::_downloadComplete);
+            connect(ftpManager, &FTPManager::downloadComplete, requestMachine, &RequestMetaDataTypeStateMachine::_downloadCompleteMetaDataJson);
             ftpManager->download(compInfo.metadataURI, QStandardPaths::writableLocation(QStandardPaths::TempLocation));
         } else {
             // FIXME: NYI
@@ -214,7 +302,7 @@ void RequestMetaDataTypeStateMachine::_stateRequestTranslationJson(StateMachine*
         } else {
             qCDebug(ComponentInformationManagerLog) << "Downloading translation json" << compInfo.translationURI;
             if (_uriIsFTP(compInfo.translationURI)) {
-                connect(ftpManager, &FTPManager::downloadComplete, requestMachine, &RequestMetaDataTypeStateMachine::_downloadComplete);
+                connect(ftpManager, &FTPManager::downloadComplete, requestMachine, &RequestMetaDataTypeStateMachine::_downloadCompleteTranslationJson);
                 ftpManager->download(compInfo.metadataURI, QStandardPaths::writableLocation(QStandardPaths::TempLocation));
             } else {
                 // FIXME: NYI
@@ -227,6 +315,14 @@ void RequestMetaDataTypeStateMachine::_stateRequestTranslationJson(StateMachine*
     }
 }
 
+void RequestMetaDataTypeStateMachine::_stateRequestComplete(StateMachine* stateMachine)
+{
+    RequestMetaDataTypeStateMachine*    requestMachine  = static_cast<RequestMetaDataTypeStateMachine*>(stateMachine);
+
+    requestMachine->compMgr()->_compInfoJsonAvailable(requestMachine->_jsonMetadataFileName, requestMachine->_jsonTranslationFileName);
+    requestMachine->advance();
+}
+
 bool RequestMetaDataTypeStateMachine::_uriIsFTP(const QString& uri)
 {
     return uri.startsWith("mavlinkftp", Qt::CaseInsensitive);

src/Vehicle/ComponentInformationManager.h

@@ -43,12 +43,15 @@ public:
     void            statesCompleted (void) const final;
 
 private slots:
-    void _downloadComplete(const QString& file, const QString& errorMsg);
+    void    _downloadCompleteMetaDataJson   (const QString& file, const QString& errorMsg);
+    void    _downloadCompleteTranslationJson(const QString& file, const QString& errorMsg);
+    QString _downloadCompleteJsonWorker     (const QString& jsonFileName, const QString& inflatedFileName);
 
 private:
     static void _stateRequestCompInfo           (StateMachine* stateMachine);
     static void _stateRequestMetaDataJson       (StateMachine* stateMachine);
     static void _stateRequestTranslationJson    (StateMachine* stateMachine);
+    static void _stateRequestComplete           (StateMachine* stateMachine);
     static bool _uriIsFTP                       (const QString& uri);
 
 
@@ -56,6 +59,8 @@ private:
     COMP_METADATA_TYPE              _type               = COMP_METADATA_TYPE_VERSION;
     bool                            _compInfoAvailable  = false;
     ComponentInformation_t          _compInfo;
+    QString                         _jsonMetadataFileName;
+    QString                         _jsonTranslationFileName;
 
     static StateFn                  _rgStates[];
     static int                      _cStates;
@@ -78,7 +83,9 @@ public:
     const StateFn*  rgStates    (void) const final;
 
 private:
-    void _stateRequestCompInfoComplete(void);
+    void _stateRequestCompInfoComplete  (void);
+    void _compInfoJsonAvailable         (const QString& metadataJsonFileName, const QString& translationsJsonFileName);
+    bool _isCompTypeSupported           (COMP_METADATA_TYPE type);
 
     static void _stateRequestCompInfoVersion        (StateMachine* stateMachine);
     static void _stateRequestCompInfoParam          (StateMachine* stateMachine);
@@ -97,5 +104,8 @@ private:
     static StateFn                  _rgStates[];
     static int                      _cStates;
 
+    static const char*              _jsonVersionKey;
+    static const char*              _jsonSupportedCompMetadataTypesKey;
+
     friend class RequestMetaDataTypeStateMachine;
 };

src/Vehicle/StateMachine.cc

@@ -50,3 +50,12 @@ void StateMachine::statesCompleted(void) const
 {
 
 }
+
+StateMachine::StateFn StateMachine::currentState(void)
+{
+    if (_active) {
+        return rgStates()[_stateIndex];
+    } else {
+        return nullptr;
+    }
+}

src/Vehicle/StateMachine.h

@@ -29,6 +29,8 @@ public:
     /// Move the state machine to the specified state and call the state function
     void move(StateFn stateFn);
 
+    StateFn currentState(void);
+
     /// @return The number of states in the rgStates array
     virtual int stateCount(void) const = 0;
 

src/VehicleSetup/FirmwareUpgradeController.cc

@@ -15,7 +15,8 @@
 #include "QGCCorePlugin.h"
 #include "FirmwareUpgradeSettings.h"
 #include "SettingsManager.h"
-#include "QGCTemporaryFile.h"
+#include "QGCZlib.h"
+#include "JsonHelper.h"
 
 #include <QStandardPaths>
 #include <QRegularExpression>
@@ -892,68 +893,19 @@ void FirmwareUpgradeController::_ardupilotManifestDownloadFinished(QString remot
 
     qCDebug(FirmwareUpgradeLog) << "_ardupilotManifestDownloadFinished" << remoteFile << localFile;
 
-    QFile inputFile(localFile);
-    if (!inputFile.open(QIODevice::ReadOnly)) {
-        qCWarning(FirmwareUpgradeLog) << "Unable to open ArduPilot firmware manifest file for reading" << localFile << inputFile.errorString();
-        QFile::remove(localFile);
+    QString jsonFileName(QDir(QStandardPaths::writableLocation(QStandardPaths::TempLocation)).absoluteFilePath("ArduPilot.Manifest.json"));
+    if (!QGCZlib::inflateGzipFile(localFile, jsonFileName)) {
+        qCWarning(FirmwareUpgradeLog) << "Inflate of compressed manifest failed" << localFile;
         return;
     }
 
-    int             ret;
-    const int       cBuffer = 1024 * 5;
-    unsigned char   inputBuffer[cBuffer];
-    unsigned char   outputBuffer[cBuffer];
-    z_stream        strm;
-    QByteArray      jsonBytes;
-
-    strm.zalloc     = nullptr;
-    strm.zfree      = nullptr;
-    strm.opaque     = nullptr;
-    strm.avail_in   = 0;
-    strm.next_in    = nullptr;
-
-    ret = inflateInit2(&strm, 16+MAX_WBITS);
-    if (ret != Z_OK) {
-        qCWarning(FirmwareUpgradeLog) << "inflateInit2 failed:" << ret;
-        QFile::remove(localFile);
+    QString         errorString;
+    QJsonDocument   doc;
+    if (JsonHelper::isJsonFile(jsonFileName, doc, errorString)) {
+        qCWarning(FirmwareUpgradeLog) << "Json file read failed" << errorString;
         return;
     }
 
-    do {
-        strm.avail_in = static_cast<unsigned>(inputFile.read((char*)inputBuffer, cBuffer));
-        if (strm.avail_in == 0) {
-            break;
-        }
-        strm.next_in = inputBuffer;
-
-        do {
-            strm.avail_out  = cBuffer;
-            strm.next_out   = outputBuffer;
-
-            ret = inflate(&strm, Z_NO_FLUSH);
-            if (ret != Z_OK && ret != Z_STREAM_END) {
-                qCWarning(FirmwareUpgradeLog) << "Inflate failed" << ret;
-                inflateEnd(&strm);
-                QFile::remove(localFile);
-                return;
-            }
-
-            unsigned cBytesInflated = cBuffer - strm.avail_out;
-            jsonBytes.append((char*)outputBuffer, static_cast<int>(cBytesInflated));
-        } while (strm.avail_out == 0);
-    } while (ret != Z_STREAM_END);
-
-    inflateEnd(&strm);
-    inputFile.close();
-    QFile::remove(localFile);
-
-    QJsonParseError jsonParseError;
-    QJsonDocument doc = QJsonDocument::fromJson(jsonBytes, &jsonParseError);
-    if (jsonParseError.error != QJsonParseError::NoError) {
-        qCWarning(FirmwareUpgradeLog) <<  "Unable to open ArduPilot manifest json document" << localFile << jsonParseError.errorString();
-    }
-
-
     QJsonObject json =          doc.object();
     QJsonArray  rgFirmware =    json[_manifestFirmwareJsonKey].toArray();
 

src/comm/MockLink.cc

@@ -1529,7 +1529,7 @@ bool MockLink::_handleRequestMessage(const mavlink_command_long_t& request, bool
 void MockLink::_sendVersionMetaData(void)
 {
     mavlink_message_t   responseMsg;
-    char                metaDataURI[MAVLINK_MSG_COMPONENT_INFORMATION_FIELD_METADATA_URI_LEN]       = "mavlinkftp://version.json";
+    char                metaDataURI[MAVLINK_MSG_COMPONENT_INFORMATION_FIELD_METADATA_URI_LEN]       = "mavlinkftp://version.json.gz";
     char                translationURI[MAVLINK_MSG_COMPONENT_INFORMATION_FIELD_TRANSLATION_URI_LEN] = "";
 
     mavlink_msg_component_information_pack_chan(_vehicleSystemId,

src/comm/MockLinkFTP.cc

@@ -119,6 +119,10 @@ void MockLinkFTP::_openCommand(uint8_t senderSystemId, uint8_t senderComponentId
         tmpFilename = _createTestTempFile(sizeString.toInt());
     } else if (path == "/version.json") {
         tmpFilename = ":MockLink/Version.MetaData.json";
+    } else if (path == "/version.json.gz") {
+        tmpFilename = ":MockLink/Version.MetaData.json.gz";
+    } else if (path == "/parameter.json") {
+        tmpFilename = ":MockLink/Parameter.MetaData.json";
     }
 
     if (!tmpFilename.isEmpty()) {