Implement filter on PackageList

The filter affects the URL. So we can't just start a request in the init. We need to request once all of the properties have been set.
We also can't start the request when the filter changes, because there will be more filters and we don't want to start multiple requests. It needs to be manual.

Contributes to issue CURA-8557.

plugins/Marketplace/PackageList.py

@@ -40,12 +40,12 @@ class PackageList(ListModel):
 
         self._is_loading = True
         self._scope = JsonDecoratorScope(UltimakerCloudScope(CuraApplication.getInstance()))
-        self._request_url = f"{Marketplace.PACKAGES_URL}?limit={self.ITEMS_PER_PAGE}"
         self._error_message = ""
 
-        self.addRoleName(self.PackageRole, "package")
+        self._package_type_filter = ""
+        self._request_url = self._initialRequestUrl()
 
-        self.request()
+        self.addRoleName(self.PackageRole, "package")
 
     @pyqtSlot()
     def request(self) -> None:
@@ -65,6 +65,10 @@ class PackageList(ListModel):
             error_callback = self._onError
         )
 
+    def reset(self) -> None:
+        self.clear()
+        self._request_url = self._initialRequestUrl()
+
     isLoadingChanged = pyqtSignal()
 
     def setIsLoading(self, is_loading: bool) -> None:
@@ -91,6 +95,22 @@ class PackageList(ListModel):
         """
         return self._request_url != ""
 
+    packageTypeFilterChanged = pyqtSignal()
+
+    def setPackageTypeFilter(self, new_filter: str) -> None:
+        if new_filter != self._package_type_filter:
+            self._package_type_filter = new_filter
+            self.reset()
+            self.packageTypeFilterChanged.emit()
+
+    @pyqtProperty(str, notify = packageTypeFilterChanged, fset = setPackageTypeFilter)
+    def packageTypeFilter(self) -> str:
+        """
+        Get the package type this package list is filtering on, like ``plugin`` or ``material``.
+        :return: The package type this list is filtering on.
+        """
+        return self._package_type_filter
+
     def setErrorMessage(self, error_message: str) -> None:
         if self._error_message != error_message:
             self._error_message = error_message
@@ -108,6 +128,15 @@ class PackageList(ListModel):
         """
         return self._error_message
 
+    def _initialRequestUrl(self) -> str:
+        """
+        Get the URL to request the first paginated page with.
+        :return: A URL to request.
+        """
+        if self._package_type_filter != "":
+            return f"{Marketplace.PACKAGES_URL}?package_type={self._package_type_filter}&limit={self.ITEMS_PER_PAGE}"
+        return f"{Marketplace.PACKAGES_URL}?limit={self.ITEMS_PER_PAGE}"
+
     def _parseResponse(self, reply: "QNetworkReply") -> None:
         """
         Parse the response from the package list API request.

plugins/Marketplace/resources/qml/Materials.qml

@@ -7,5 +7,6 @@ Packages
 {
     model: Marketplace.PackageList
     {
+        packageTypeFilter: "material"
     }
 }

plugins/Marketplace/resources/qml/Packages.qml

@@ -13,6 +13,8 @@ ScrollView
 
     property alias model: pluginColumn.model
 
+    Component.onCompleted: model.request()
+
     ListView
     {
         id: pluginColumn

plugins/Marketplace/resources/qml/Plugins.qml

@@ -7,5 +7,6 @@ Packages
 {
     model: Marketplace.PackageList
     {
+        packageTypeFilter: "plugin"
     }
 }