add new expcetions

audiobookdl/assets/errors/book_has_no_audiobook.txt

@@ -0,0 +1,3 @@
+[red]ERROR: Book has no audiobook[/red]
+
+Only audiobooks are supported.

audiobookdl/assets/errors/book_not_found.txt

@@ -0,0 +1,3 @@
+[red]ERROR: Book doesn't exist[/red]
+
+Please check the URL.

audiobookdl/assets/errors/book_not_released.txt

@@ -0,0 +1,3 @@
+[red]ERROR: Book is not released yet[/red]
+
+Your don't have access to the book you are trying to download because it's not yet released.

audiobookdl/assets/errors/download_error.txt

@@ -0,0 +1,4 @@
+[red]Download failed[/red]
+
+Expected status code {expected_status_code}, got {status_code}
+Expected content-type {expected_content_type}, got {content_type}

audiobookdl/assets/errors/generic.txt

@@ -0,0 +1,3 @@
+[red]{heading}[/red]
+
+{body}

audiobookdl/exceptions.py

@@ -41,5 +41,23 @@ class UserNotAuthorized(AudiobookDLException):
 class MissingBookAccess(AudiobookDLException):
     error_description = "book_access"
 
+class BookNotFound(AudiobookDLException):
+    error_description = "book_not_found"
+
+class BookNotReleased(AudiobookDLException):
+    error_description = "book_not_released"
+
+class BookHasNoAudiobook(AudiobookDLException):
+    error_description = "book_has_no_audiobook"
+
 class ConfigNotFound(AudiobookDLException):
     error_description = "config_not_found"
+
+class GenericAudiobookDLException(AudiobookDLException):
+    error_description: str = "generic"
+
+    def __init__(self, heading: str, body: Optional[int] = None) -> None:
+        self.data = {'heading': heading, 'body': body if body else ""}
+
+class DownloadError(AudiobookDLException):
+    error_description: str = "download_error"