Checker: Add base of checker list view.

src/Checker/Checker.py

@@ -26,6 +26,10 @@ class AbstractModelChecker(object):
     def description(self):
         return self._description
 
+    @property
+    def summary(self):
+        return self._summary
+
     # Checker status
 
     def is_unknown(self):
@@ -53,11 +57,3 @@ class AbstractModelChecker(object):
             otherelse
         """
         raise NotImplementedMethodeError(self, self.run)
-
-    def summary(self):
-        """Return summary message
-
-        Returns:
-            Return summary string
-        """
-        raise NotImplementedMethodeError(self, self.summary)

src/Checker/Study.py

@@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+
+from PyQt5.QtCore import QCoreApplication
+
+from Checker.Checker import AbstractModelChecker, STATUS
+
+_translate = QCoreApplication.translate
+
+
+class StudyNetworkReachChecker(AbstractModelChecker):
+    def __init__(self):
+        super(StudyNetworkReachChecker, self).__init__()
+
+        self._name = _translate("Checker", "Study network reach checker")
+        self._description = _translate("Checker", "Check if exists at least one reach for study")
+
+    def run(self, study):
+        if study is None:
+            self._status = STATUS.ERROR
+            self._summary = "invalid_study"
+            return False
+
+        river = study.river
+        if river is None:
+            self._status = STATUS.ERROR
+            self._summary = "no_river_found"
+            return False
+
+        if len(river.edges()) == 0:
+            self._status = STATUS.ERROR
+            self._summary = "no_reach_defined"
+            return False
+
+        self._summary = "ok"
+        self._status = STATUS.OK
+        return True