Also change Extractor to be based on MIME types rather than type enums

Same as ExtractorFilter, this is still translating to the old format on
both sides, enabling further changes.

src/lib/extractor.cpp

 /*
-   SPDX-FileCopyrightText: 2017 Volker Krause <vkrause@kde.org>
+   SPDX-FileCopyrightText: 2017-2021 Volker Krause <vkrause@kde.org>
 
    SPDX-License-Identifier: LGPL-2.0-or-later
 */
@@ -21,7 +21,7 @@ namespace KItinerary {
 class ExtractorPrivate : public QSharedData
 {
 public:
-    ExtractorInput::Type m_type = ExtractorInput::Text;
+    QString m_mimeType;
     QString m_fileName;
     QString m_scriptName;
     QString m_scriptFunction;
@@ -45,10 +45,12 @@ bool Extractor::load(const QJsonObject &obj, const QString &fileName, int index)
     d->m_fileName = fileName;
     d->m_index = index;
 
-    d->m_type = ExtractorInput::typeFromName(obj.value(QLatin1String("type")).toString());
-    if (d->m_type == ExtractorInput::Unknown) {
-        qCDebug(Log) << "extractor type not specified" << fileName;
-        d->m_type = ExtractorInput::Text;
+    d->m_mimeType = obj.value(QLatin1String("mimeType")).toString();
+    if (d->m_mimeType.isEmpty()) { // ### legacy support
+        setType(ExtractorInput::typeFromName(obj.value(QLatin1String("type")).toString()));
+    }
+    if (d->m_mimeType.isEmpty()) {
+        qCDebug(Log) << "extractor MIME type not specified" << fileName;;
     }
 
     const auto filterArray = obj.value(QLatin1String("filter")).toArray();
@@ -72,13 +74,13 @@ bool Extractor::load(const QJsonObject &obj, const QString &fileName, int index)
     }
     d->m_scriptFunction = obj.value(QLatin1String("function")).toString(QStringLiteral("main"));
 
-    return !d->m_filters.empty();
+    return !d->m_filters.empty() && !d->m_mimeType.isEmpty();
 }
 
 QJsonObject Extractor::toJson() const
 {
     QJsonObject obj;
-    obj.insert(QStringLiteral("type"), ExtractorInput::typeToString(d->m_type));
+    obj.insert(QLatin1String("mimeType"), d->m_mimeType);
 
     QFileInfo metaFi(d->m_fileName);
     QFileInfo scriptFi(d->m_scriptName);
@@ -107,13 +109,23 @@ QString Extractor::name() const
 
 ExtractorInput::Type Extractor::type() const
 {
-    return d->m_type;
+    return ExtractorInput::typeFromMimeType(d->m_mimeType);
 }
 
 void Extractor::setType(ExtractorInput::Type type)
+{
+    setMimeType(ExtractorInput::typeToMimeType(type));
+}
+
+QString Extractor::mimeType() const
+{
+    return d->m_mimeType;
+}
+
+void Extractor::setMimeType(const QString &mimeType)
 {
     d.detach();
-    d->m_type = type;
+    d->m_mimeType = mimeType;
 }
 
 QString Extractor::scriptFileName() const

src/lib/extractor.h

 /*
-   SPDX-FileCopyrightText: 2017 Volker Krause <vkrause@kde.org>
+   SPDX-FileCopyrightText: 2017-2021 Volker Krause <vkrause@kde.org>
 
    SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
-#ifndef EXTRACTOR_H
-#define EXTRACTOR_H
+#ifndef KITINERARY_EXTRACTOR_H
+#define KITINERARY_EXTRACTOR_H
 
 #include "kitinerary_export.h"
 #include "extractorinput.h"
@@ -92,7 +92,9 @@ public:
     QString name() const;
 
     /** Data type this extractor can process. */
-    ExtractorInput::Type type() const;
+    [[deprecated("use mimeType()")]] ExtractorInput::Type type() const;
+    /** The MIME type this script extractor supports. */
+    QString mimeType() const;
 
     /** The JS script containing the code of the extractor. */
     QString scriptFileName() const;
@@ -110,7 +112,8 @@ public:
     /** Source file name. */
     QString fileName() const;
 
-    void setType(ExtractorInput::Type type);
+    [[deprecated("use setMimeType()")]] void setType(ExtractorInput::Type type);
+    void setMimeType(const QString &mimeType);
     void setScriptFileName(const QString &script);
     void setScriptFunction(const QString &func);
     void setFilters(std::vector<ExtractorFilter> filters);
@@ -123,4 +126,4 @@ private:
 
 }
 
-#endif // EXTRACTOR_H
+#endif // KITINERARY_EXTRACTOR_H