Added SheerkaComparisonManager

src/core/sheerka/services/SheerkaHistoryManager.py

@@ -0,0 +1,63 @@
+from collections import namedtuple
+
+from sdp.sheerkaDataProvider import Event
+
+hist = namedtuple("HistoryTest", "text status")  # tests purposes only
+
+
+class History:
+    def __init__(self, event: Event, result):
+        self.event = event
+        self.result = result
+        self._status = None
+
+    def __str__(self):
+        msg = f"{self.event.get_digest()} {self.event.date.strftime('%d/%m/%Y %H:%M:%S')} : {self.event.message}"
+        status = self.status
+        if status is not None:
+            msg += f" => {status}"
+        return msg
+
+    def __repr__(self):
+        return f"History(event={self.event!r}, status={self.status}, result={self.result})"
+
+    def __eq__(self, other):
+        if id(self) == id(other):
+            return True
+
+        if isinstance(other, hist):
+            return self.event.message == other.text and self.status == other.status
+
+        if not isinstance(other, History):
+            return False
+
+        return self.event == other.event and self.result == other.result
+
+    @property
+    def status(self):
+        if self._status:
+            return self._status
+
+        self._status = self.result.get_status() if self.result else None
+        return self._status
+
+
+class SheerkaHistoryManager:
+    def __init__(self, sheerka):
+        self.sheerka = sheerka
+
+    def history(self, depth, start):
+        """
+        Load history
+        :param depth: number of items
+        :param start:
+        :return:
+        """
+
+        events = list(self.sheerka.sdp.load_events(depth, start))
+        for event in events:
+            try:
+                result = self.sheerka.sdp.load_result(event.get_digest())
+            except (IOError, KeyError):
+                result = None
+            yield History(event, result)