Add a register api

- Add a register api
- Change requirements, which flask version should be over 2.0

latest version/core/sql.py

@@ -0,0 +1,83 @@
+import sqlite3
+from flask import current_app
+import traceback
+
+
+class Connect():
+    # 数据库连接类，上下文管理
+
+    def __init__(self, file_path='./database/arcaea_database.db'):
+        """
+        数据库连接，默认连接arcaea_database.db
+        接受：文件路径
+        返回：sqlite3连接操作对象
+        """
+        self.file_path = file_path
+
+    def __enter__(self):
+        self.conn = sqlite3.connect(self.file_path)
+        self.c = self.conn.cursor()
+        return self.c
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        if self.conn:
+            self.conn.commit()
+            self.conn.close()
+
+        if exc_type is not None:
+            current_app.logger.error(
+                traceback.format_exception(exc_type, exc_val, exc_tb))
+
+        return True
+
+
+class Sql():
+
+    @staticmethod
+    def select(c, table_name, target_column=[], query=None):
+        # 执行查询单句sql语句，返回fetchall数据
+        # 使用准确查询，且在单表内
+
+        sql = 'select '
+        sql_dict = {}
+        if len(target_column) >= 2:
+            sql += target_column[0]
+            for i in range(1, len(target_column)):
+                sql += ',' + target_column[i]
+            sql += ' from ' + table_name
+        elif len(target_column) == 1:
+            sql += target_column[0] + ' from ' + table_name
+        else:
+            sql += '* from ' + table_name
+
+        where_field = []
+        where_value = []
+        if query:
+            for i in query.query:
+                where_field.append(i)
+                where_value.append(query.query[i])
+
+        if where_field and where_value:
+            sql += ' where '
+            sql += where_field[0] + '=:' + where_field[0]
+            sql_dict[where_field[0]] = where_value[0]
+            if len(where_field) >= 2:
+                for i in range(1, len(where_field)):
+                    sql_dict[where_field[i]] = where_value[i]
+                    sql += ' and ' + where_field[i] + '=:' + where_field[i]
+
+        if query and query.sort:
+            sql += ' order by ' + \
+                query.sort[0]['column'] + ' ' + query.sort[0]['order']
+            for i in range(1, len(query.sort)):
+                sql += ', ' + query.sort[i]['column'] + \
+                    ' ' + query.sort[i]['order']
+
+        if query and query.limit >= 0:
+            sql += ' limit :limit offset :offset'
+            sql_dict['limit'] = query.limit
+            sql_dict['offset'] = query.offset
+
+        c.execute(sql, sql_dict)
+
+        return c.fetchall()