use Cura printer metadata for storing config

fixes #8

.github/ISSUE_TEMPLATE/bug_report.md

@@ -26,7 +26,7 @@ A clear and concise description of what you expected to happen.
  - Cura-DuetRRFPlugin Version and Installation: [e.g. 1.0.6 installed via Marketplace, or git-master]
  - Duet RepRapFirmware Version: [e.g. 3.1.1, check with `M122`]
 
-** Cura Log**
+**Cura Log**
 Based on your Cura version, please drag&drop the log file into the issue, or copy&paste all lines with `DuetRRFPlugin`:
 Windows: C:\Users\<username>\AppData\Roaming\cura\4.6\cura.log
 macOS: ~/Library/Application Support/Cura/4.6/cura.log

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog of Cura-DuetRRFPlugin
 
+## v1.1.0: 2020-XX-XX
+  * BREAKING CHANGE: migrate settings to be printer-specific
+  * auto-migrate legacy settings for active printers if printer name matches
+
 ## v1.0.11: 2020-08-29
   * bump compatibility for Cura 4.7 / API 7.3
   * fix Cura crashes with non-latin strings in Message boxes

DuetRRFAction.py

@@ -0,0 +1,106 @@
+import os
+import json
+import re
+
+from PyQt5.QtCore import QObject, pyqtSlot
+
+from cura.CuraApplication import CuraApplication
+from cura.MachineAction import MachineAction
+
+from UM.Logger import Logger
+from UM.Settings.ContainerRegistry import ContainerRegistry
+from UM.Settings.DefinitionContainer import DefinitionContainer
+from UM.i18n import i18nCatalog
+catalog = i18nCatalog("cura")
+
+
+class DuetRRFAction(MachineAction):
+    def __init__(self, parent: QObject = None) -> None:
+        super().__init__("DuetRRFAction", catalog.i18nc("@action", "Connect Duet RepRapFirmware"))
+
+        self._qml_url = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'resources', 'qml', 'DuetRRFAction.qml')
+        self._application = CuraApplication.getInstance()
+
+        ContainerRegistry.getInstance().containerAdded.connect(self._onContainerAdded)
+
+    def _onContainerAdded(self, container: "ContainerInterface") -> None:
+        # Add this action as a supported action to all machine definitions
+        if (
+            isinstance(container, DefinitionContainer) and
+            container.getMetaDataEntry("type") == "machine" and
+            container.getMetaDataEntry("supports_usb_connection")
+        ):
+            self._application.getMachineActionManager().addSupportedAction(container.getId(), self.getKey())
+
+    @pyqtSlot(result=str)
+    def printerSettingUrl(self):
+        global_container_stack = self._application.getGlobalContainerStack()
+        if global_container_stack:
+            return global_container_stack.getMetaDataEntry("duetrrf_url", "")
+        return ""
+
+    @pyqtSlot(result=str)
+    def printerSettingDuetPassword(self):
+        global_container_stack = self._application.getGlobalContainerStack()
+        if global_container_stack:
+            return global_container_stack.getMetaDataEntry("duetrrf_duet_password", "")
+        return ""
+
+    @pyqtSlot(result=str)
+    def printerSettingHTTPUser(self):
+        global_container_stack = self._application.getGlobalContainerStack()
+        if global_container_stack:
+            return global_container_stack.getMetaDataEntry("duetrrf_http_user", "")
+        return ""
+
+    @pyqtSlot(result=str)
+    def printerSettingHTTPPassword(self):
+        global_container_stack = self._application.getGlobalContainerStack()
+        if global_container_stack:
+            return global_container_stack.getMetaDataEntry("duetrrf_http_password", "")
+        return ""
+
+    @pyqtSlot(str, str, str, str)
+    def testAndSave(self, url, duet_password, http_user, http_password):
+        if not url.endswith('/'):
+            url += '/'
+
+        global_container_stack = self._application.getGlobalContainerStack()
+        if not global_container_stack:
+            Logger.log("e", "failed to save config: global_container_stack is missing")
+            return
+
+        global_container_stack.setMetaDataEntry("duetrrf", True)
+        global_container_stack.setMetaDataEntry("duetrrf_url", url)
+        global_container_stack.setMetaDataEntry("duetrrf_duet_password", duet_password)
+        global_container_stack.setMetaDataEntry("duetrrf_http_user", http_user)
+        global_container_stack.setMetaDataEntry("duetrrf_http_password", http_password)
+        Logger.log("d", "config saved: " + global_container_stack.getName())
+
+    @pyqtSlot()
+    def deleteConfig(self):
+        global_container_stack = self._application.getGlobalContainerStack()
+        if not global_container_stack:
+            Logger.log("e", "failed to delete config: global_container_stack is missing")
+            return
+
+        global_container_stack.removeMetaDataEntry("duetrrf")
+        global_container_stack.removeMetaDataEntry("duetrrf_url")
+        global_container_stack.removeMetaDataEntry("duetrrf_duet_password")
+        global_container_stack.removeMetaDataEntry("duetrrf_http_user")
+        global_container_stack.removeMetaDataEntry("duetrrf_http_password")
+        Logger.log("d", "config deleted: " + global_container_stack.getName())
+
+    @pyqtSlot(str, result=bool)
+    def validUrl(self, newUrl):
+        if newUrl.startswith('\\\\'):
+            # no UNC paths
+            return False
+        if not re.match('^https?://.', newUrl):
+            # missing https?://
+            return False
+        if '@' in newUrl:
+            # @ is probably HTTP basic auth, which is a separate setting
+            return False
+
+        return True