Added sqlalchemy to the project

.gitignore

@@ -3,4 +3,5 @@ venv/
 .idea/
 *.pyc
 *.swp
-.mypy_cache/
+.mypy_cache/
+*.db

cli.py

@@ -4,22 +4,19 @@
 from formatter import Styles, show_style
 
 
-def show_all_styles():
-    all_styles: List[str] = [
-        f'{style.value}. {style.name}'.lower()
-        for style in Styles.STYLE_MAPPING.values()
-    ]
+def show_all_styles(db_config):
+    all_styles: List[str] = db_config.list()
     print('\n'.join(all_styles))
 
 
 def chosen_style_exists(chosen_style: str) -> bool:
     return chosen_style in Styles.STYLE_MAPPING
 
 
-def handle_arguments(parser: argparse.ArgumentParser):
+def handle_arguments(parser: argparse.ArgumentParser, db_config):
     arguments = parser.parse_args()
     if arguments.show_styles:
-        show_all_styles()
+        show_all_styles(db_config)
         return
     if not arguments.chosen_style:
         parser.print_help()
@@ -31,7 +28,7 @@ def handle_arguments(parser: argparse.ArgumentParser):
                arguments.text)
 
 
-def init_argparser():
+def init_argparser(db_config):
     parser = argparse.ArgumentParser(
         description='This is parser for the formatter flags')
     parser.add_argument('-a',
@@ -47,4 +44,4 @@ def init_argparser():
                         action='store',
                         help='text for formatting',
                         nargs='?')
-    handle_arguments(parser)
+    handle_arguments(parser, db_config)

db.py

@@ -0,0 +1,74 @@
+import os
+
+from typing import List
+
+from sqlalchemy import create_engine, MetaData, Table, Column, Integer, String
+from sqlalchemy.sql import select
+import sqlalchemy_utils
+
+SQLITE_DB_PATH = 'styles.db'
+SQLITE_URL = f'sqlite:///{SQLITE_DB_PATH}'
+
+
+class DBConfig():
+
+    STYLE_TABLE_NAME = 'styles'
+
+    def __init__(self, db_url: str):
+        self.__engine = None
+        self.meta = None
+        self.db_url = db_url
+        self.__styles = None
+
+    def create_styles_table(self):
+        self.meta = MetaData()
+        if not self.styles_table_exists():
+            self.__styles = Table(
+                self.STYLE_TABLE_NAME,
+                self.meta,
+                Column('id', Integer, primary_key=True),
+                Column('name', String),
+                Column('body', String),
+            )
+            self.meta.create_all(self.__engine)
+
+            conn = self.__engine.connect()
+            conn.execute(self.__styles.insert().values(name='hash_border',
+                                                       body=''))
+            conn.execute(self.__styles.insert().values(name='plain_text',
+                                                       body=''))
+            conn.execute(self.__styles.insert().values(name='at_sign',
+                                                       body=''))
+        else:
+            self.__styles = Table(
+                self.STYLE_TABLE_NAME,
+                self.meta,
+                Column('id', Integer, primary_key=True),
+                Column('name', String),
+                Column('body', String),
+            )
+
+    def connect(self):
+        self.__engine = create_engine(self.db_url, echo=True)
+
+    def styles_table_exists(self) -> bool:
+        return self.__engine.dialect.has_table(self.__engine,
+                                               self.STYLE_TABLE_NAME)
+
+    def list(self) -> List[str]:
+        conn = self.__engine.connect()
+        select_query = select([self.__styles])
+        styles = conn.execute(select_query)
+        all_styles: List[str] = [style.name for style in styles]
+        return all_styles
+
+
+def get_db_object():
+    db_config = DBConfig(SQLITE_URL)
+    db_config.connect()
+    db_config.create_styles_table()
+    return db_config
+
+
+def init_styles_db():
+    return get_db_object()

main

@@ -3,6 +3,10 @@
 Module for launching formater
 """
 from cli import init_argparser
+from db import init_styles_db
+
 
 if __name__ == '__main__':
-    init_argparser()
+    db_config = init_styles_db()
+    init_argparser(db_config)
+

requirements.txt

@@ -0,0 +1 @@
+SQLAlchemy==1.3.12