get device path from calibre, and allow device usage on all platforms

Obok_calibre_plugin/obok_plugin/obok/obok.py

@@ -244,8 +244,10 @@ class KoboLibrary(object):
     written by the Kobo Desktop Edition application, including the list
     of books, their titles, and the user's encryption key(s)."""
 
-    def __init__ (self, serials = []):
+    def __init__ (self, serials = [], device_path = None):
         print u"Obok v{0}\nCopyright © 2012-2015 Physisticated et al.".format(__version__)
+        self.kobodir = ''
+        kobodb = ''
         if sys.platform.startswith('win'):
             if sys.getwindowsversion().major > 5:
                 self.kobodir = os.environ['LOCALAPPDATA']
@@ -254,20 +256,30 @@ class KoboLibrary(object):
             self.kobodir = os.path.join(self.kobodir, 'Kobo', 'Kobo Desktop Edition')
         elif sys.platform.startswith('darwin'):
             self.kobodir = os.path.join(os.environ['HOME'], 'Library', 'Application Support', 'Kobo', 'Kobo Desktop Edition')
-        elif sys.platform.startswith('linux'):
-            # TODO TODO TODO needs change - fixed path to mount point
-            self.kobodir = '/media/norbert/KOBOeReader/.kobo'
-        self.bookdir = os.path.join(self.kobodir, 'kepub')
-        if sys.platform.startswith('linux'):
-            kobodb = os.path.join(self.kobodir, 'KoboReader.sqlite')
-        else:
-            kobodb = os.path.join(self.kobodir, 'Kobo.sqlite')
-        self.__sqlite = sqlite3.connect(kobodb)
-        self.__cursor = self.__sqlite.cursor()
-        self._userkeys = []
-        self._books = []
-        self._volumeID = []
-        self._serials = serials
+        # desktop versions use Kobo.sqlite
+        kobodb = os.path.join(self.kobodir, 'Kobo.sqlite')
+        if (self.kobodir == '' or not(os.path.exists(kobodb))):
+            # kobodb is either not set or not an existing file, that means that either:
+            # . windows or mac: desktop app is not installed
+            # . linux
+            # we check for a connected device and try to set up kobodir and kobodb from there
+            if (device_path):
+                self.kobodir = os.path.join(device_path, '.kobo')
+                # devices use KoboReader.sqlite
+                kobodb  = os.path.join(self.kobodir, 'KoboReader.sqlite')
+                if (not(os.path.exists(kobodb))):
+                    # give up here, we haven't found anything useful
+                    self.kobodir = ''
+                    kobodb  = ''
+        
+        if (self.kobodir != ''):
+            self.bookdir = os.path.join(self.kobodir, 'kepub')
+            self.__sqlite = sqlite3.connect(kobodb)
+            self.__cursor = self.__sqlite.cursor()
+            self._userkeys = []
+            self._books = []
+            self._volumeID = []
+            self._serials = serials
 
     def close (self):
         """Closes the database used by the library."""
@@ -326,8 +338,10 @@ class KoboLibrary(object):
             for m in matches:
                 # print "m:",m[0]
                 macaddrs.append(m[0].upper())
-        elif sys.platform.startswith('linux'):
-            macaddrs.extend(self._serials)
+
+        # extend the list of macaddrs in any case with the serials
+        # cannot hurt ;-)
+        macaddrs.extend(self._serials)
 
         return macaddrs