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hassio-google-drive-backup/backup/config/version.py

@@ -0,0 +1,84 @@
+STAGING_KEY = ".staging."
+EXPECTED_VERISON_CHARS = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.']
+
+
+class Version:
+    def __init__(self, *args):
+        self._identifiers = args
+        self.staging = False
+
+    @classmethod
+    def default(cls):
+        return Version(0)
+
+    @classmethod
+    def parse(cls, version: str):
+        staging_version = None
+        if STAGING_KEY in version:
+            index = version.find(STAGING_KEY)
+            staging_version = int(version[index + len(STAGING_KEY):])
+            version = version[0:index]
+        version = Version._removeUnexpected(version)
+        parts = []
+        for part in version.split("."):
+            if len(part) > 0:
+                parts.append(int(part))
+        if staging_version is not None:
+            parts.append(staging_version)
+        if len(parts) == 0:
+            parts.append(0)
+        ret = Version(*parts)
+        if staging_version is not None:
+            ret.staging = True
+        return ret
+
+    @classmethod
+    def _removeUnexpected(cls, version: str):
+        ret = ""
+        for c in version:
+            if c in EXPECTED_VERISON_CHARS:
+                ret += c
+        while ".." in ret:
+            ret = ret.replace("..", ".")
+        return ret
+
+    def __getitem__(self, key):
+        return self._identifiers[key]
+
+    def length(self):
+        return len(self._identifiers)
+
+    def _compare(self, other):
+        i = 0
+        while(i < min(self.length(), other.length())):
+            if self[i] < other[i]:
+                return -1
+            if self[i] > other[i]:
+                return 1
+            i += 1
+        if self.length() < other.length():
+            return -1
+        if self.length() > other.length():
+            return 1
+        return 0
+
+    def __lt__(self, other):
+        return self._compare(other) < 0
+
+    def __le__(self, other):
+        return self._compare(other) <= 0
+
+    def __eq__(self, other):
+        return self._compare(other) == 0
+
+    def __ne__(self, other):
+        return self._compare(other) != 0
+
+    def __gt__(self, other):
+        return self._compare(other) > 0
+
+    def __ge__(self, other):
+        return self._compare(other) >= 0
+
+    def __str__(self):
+        return ".".join(str(i) for i in self._identifiers)