1 files changed, 80 insertions, 0 deletions
diff --git a/cli/main.py b/cli/main.py
new file mode 100644
index 0000000..01434fa
--- /dev/null
+++ b/cli/main.py
@@ -0,0 +1,80 @@
+# Manage book library.
+#
+# Required dependencies:
+#
+#   - python >= 3.11
+#   - requests
+#   - pillow
+#   - ebook-convert CLI (from calibre)
+
+import cli.library.command
+import cli.new.command
+import cli.view.command
+import os
+import sys
+
+def main(bin_dir):
+    match sys.argv:
+        case [ _, 'new' ]:
+            books_library = get_books_library()
+            cli.new.command.run(books_library)
+        case [ _, 'new', book_source ]:
+            if os.path.isfile(book_source):
+                books_library = get_books_library()
+                cli.new.command.run(books_library, book_source)
+            else:
+                print_help(title=f'File not found: {book_source}.')
+                exit(1)
+        case [ _, 'library' ]:
+            books_library = get_books_library()
+            cli.library.command.run(books_library)
+        case [ _, 'view' ]:
+            books_library = get_books_library()
+            books_browser = get_env_var('BOOKS_BROWSER')
+            cli.view.command.run(books_library, books_browser, bin_dir)
+        case [ _, '--help' ]:
+            print_help()
+        case [ _, '-h' ]:
+            print_help()
+        case _:
+            print_help('Command not found.')
+            exit(1)
+
+def get_books_library():
+    books_library = get_env_var('BOOKS_LIBRARY')
+    if os.path.isdir(books_library):
+        return books_library
+    else:
+        print_help(title=f'BOOKS_LIBRARY {books_library} not found.')
+        exit(1)
+
+def get_env_var(key):
+    value = os.getenv(key)
+    if value:
+        return value
+    else:
+        print_help(title=f'{key} environment variable is required.')
+        exit(1)
+
+def print_help(title='Manage book library'):
+        print(f"""{title}
+
+- Insert book entry with optional ebook file:
+
+    $ python {sys.argv[0]} new [path-to-book] 
+
+- Print library metadata as json:
+
+    $ python {sys.argv[0]} library 
+
+- View books in web page:
+
+    $ python {sys.argv[0]} view
+
+Environment variables:
+
+    BOOKS_LIBRARY: path to book library,
+    BOOKS_BROWSER: browser command executed to view the library.""")
+
+if __name__ == "__main__":
+        main()