Patchwork PR: GenerateReadme

README.md

@@ -1,26 +1,78 @@
 # `get_data_by_config_value` Function Documentation
 
-This function retrieves data from a SQLite database based on a provided value and pre-configured table and column settings.
+This function is designed to extract data from a SQLite database using a specified value. The configuration, which dictates the table and column to be searched, is pre-set within the script.
+
+## Table of Contents
+
+- [Inputs](#inputs)
+- [Outputs](#outputs)
+- [Behavior](#behavior)
+- [Potential Use Cases](#potential-use-cases)
+- [Security Considerations](#security-considerations)
 
 ## Inputs
 
-- `value` (string): The value to search for in the specified database column.
+- **`value`** *(string)*: The target value you wish to find within the pre-configured database column.
 
 ## Outputs
 
-- A list of tuples. Each tuple represents a row from the database where the specified column matches the provided `value`. Returns an empty list if no matches are found.
+- **List of tuples**: Each tuple represents an entire row from the database where the specified column matches the input `value`. If no matches are found, the function returns an empty list.
 
 ## Behavior
 
-The function uses a hardcoded configuration (`CONFIG`) to determine the table and column to query. It constructs a SQL query using string concatenation, which can be a security risk (SQL injection vulnerability). The function connects to a SQLite database file named `database.db`, executes the query, fetches all matching rows, and then closes the connection. The fetched data is then returned.
+- The function relies on a hardcoded configuration dictionary, `CONFIG`, to identify which database table and column to query. The query is constructed using basic string concatenation.
+- Establishes a connection to a database file named `database.db` using SQLite's Python interface.
+- Executes the query and retrieves all matching rows.
+- Closes the database connection and returns the fetched results.
+
+### Code Snippet
+```python
+import sqlite3
+
+# Simulated config file or a settings module
+CONFIG = {
+    "default_table": "users",
+    "default_column": "username"
+}
+
+def get_data_by_config_value(value):
+    query = "SELECT * FROM " + CONFIG["default_table"] + " WHERE " + CONFIG["default_column"] + " = '" + value + "'"
+
+    connection = sqlite3.connect("database.db")
+    cursor = connection.cursor()
+    cursor.execute(query)
+    result = cursor.fetchall()
+    connection.close()
+
+    return result
+
+# Test
+print(get_data_by_config_value("admin"))
+```
 
 ## Potential Use Cases
 
-This function is likely used for retrieving specific data based on simple lookups configured in the `CONFIG` dictionary. For instance, it could be used:
+This function serves several potential applications where simple database lookups are necessary:
 
-* To fetch user details by username.
-* To retrieve product information by product ID.
+- Retrieving user details by a known username.
+- Fetching product information using a unique product ID.
+- Implementing quick data checks or data validation operations.
 
 ## Security Considerations
 
-The use of string concatenation in the query construction makes this function vulnerable to SQL injection attacks. Consider using parameterized queries or prepared statements to mitigate this risk.
+ Due to the nature of string concatenation in query construction, **the code is susceptible to SQL injection attacks**. To mitigate this risk, it is advised to:
+
+- Employ parameterized queries or prepared statement features provided by the `sqlite3` library.
+- Validate and sanitize input data rigorously prior to using it in SQL queries.
+
+**Example of a safer approach:**
+```python
+def get_safe_data_by_config_value(value):
+    connection = sqlite3.connect("database.db")
+    cursor = connection.cursor()
+    query = f"SELECT * FROM {CONFIG['default_table']} WHERE {CONFIG['default_column']} = ?"
+    cursor.execute(query, (value,))
+    result = cursor.fetchall()
+    connection.close()
+    return result
+```