fix: nodename quotation issue

* update nodename method to not use regex anymore
* update readme with 2 new columns for the exit code table

We used quite the broad regex to parse the nodename from the status
string. But we relied on a single quote to mark the starting point.
It seems some distributions don't have this starting quote,
therefore breaking the api.

README.md

@@ -113,9 +113,9 @@ Another possible solution would be to edit the `ExecStart` parameter to include
 Lookup table for all custom error codes.
 The potential reasons are sorted by probability of being the root cause.
 
-| code | potential reason |
-| :---: | :---|
-| 17 | login credential mismatch, potential api permission problem |
+| code | raised by | cause by | potential reason |
+| :---: | :---| : --- | :--- |
+| 17 | calls | api call returned empty | login credential mismatch, potential api permission problem |
 
 ### pre-commit framework
 This project utilizes the [pre-commit](https://pre-commit.com/) framework to automate various small hick-ups that tend

calls.py

@@ -14,16 +14,26 @@ class EjabberdApiCalls(EjabberdApi):
     @property
     def nodename(self):
         if self._login is not None:
-            node_str = re.compile("The node '(.*)'")
             status = self.cmd("status", {})
+            # "The node ejabberd@localhost is started with status: startedejabberd 20.07 is running in that node"
 
-            # matches
             try:
-                tmp = node_str.findall(status)[0]
-            # raise SystemExit code 17 if no status message is received
-            except TypeError:
+                tmp = status.split()[2]
+
+            except AttributeError:
+                # emtpy response or None obj
                 raise SystemExit(17)
 
+            except IndexError:
+                # status string differs from what we expect
+                log.warning("status string is different then expected")
+                tmp = "ejabberd@status-string-split-error"
+                pass
+
+            # strip double quotations
+            if tmp.startswith("'"):
+                tmp = tmp.strip("'")
+
             log.debug(f"fetched node string: {tmp}")
             return tmp