Refactor exceptions

re2oapi/client.py

@@ -43,7 +43,7 @@ class Re2oAPIClient:
         self._password = password
         try:
             self.token = self._get_token_from_file()
-        except Exception:
+        except exceptions.APIClientGenericError:
             self.token = self._get_token_from_server()
             self._save_token_to_file()
 
@@ -59,7 +59,7 @@ class Re2oAPIClient:
 
     def _get_token_from_file(self):
         if not self.token_file.is_file():
-            raise exceptions.TokenFileNotFound(str(self.token_file))
+            raise exceptions.TokenFileNotFound(self.token_file)
 
         with self.token_file.open() as f:
             data = json.load(f)
@@ -72,9 +72,9 @@ class Re2oAPIClient:
             }
         except KeyError:
             raise exceptions.TokenNotInTokenFile(
-                "{user}@{host} in {token_file}".format(user=self._username,
-                                                 hostname=self.hostname,
-                                                 token_file=str(self.token_file))
+                self._username,
+                self.hostname,
+                self.token_file
             )
 
     def _save_token_to_file(self):
@@ -104,7 +104,7 @@ class Re2oAPIClient:
             data={'username': self._username, 'password': self._password}
         )
         if response.status_code == requests.codes.bad_request:
-            raise exceptions.InvalidCredentials()
+            raise exceptions.InvalidCredentials(self._username, self.hostname)
         response.raise_for_status()
         response = response.json()
         return {

re2oapi/endpoints.py

@@ -117,7 +117,7 @@ def get_endpoint_for(name, **kwargs):
     try:
         url=urls[name]
     except KeyError as e:
-        raise exceptions.URLNameNotExists(name)
+        raise exceptions.URLNameDoesNotExists(name)
     else:
         try:
             return url.format_map(kwargs)

re2oapi/exceptions.py

@@ -1,14 +1,27 @@
-class URLNameNotExists(ValueError):
-    pass
+class APIClientGenericError(ValueError):
+    template = "{}"
 
-class URLParameterMissing(ValueError):
-    pass
+    def __init__(self, *data):
+        self.data = data
+        self.message = self.template.format(*data)
+        super(APIClientGenericError, self).__init__(self.message)
 
-class InvalidCredentials(ValueError):
-    pass
 
-class TokenFileNotFound(ValueError):
-    pass
+class URLNameDoesNotExists(APIClientGenericError):
+    template = "The name '{}' was not foud among the possible endpoints." 
 
-class TokenNotInTokenFile(ValueError):
-    pass
+
+class URLParameterMissing(APIClientGenericError):
+    template = "The url named '{}' require the parameter '{}' to be built."
+
+
+class InvalidCredentials(APIClientGenericError):
+    template = "The credentials for {}@{} are not valid."
+
+
+class TokenFileNotFound(APIClientGenericError):
+    template = "Token file at {} not found."
+
+
+class TokenNotInTokenFile(APIClientGenericError):
+    template = "Token for {}@{} not found in token file ({})."