Fix ameba errors

Author: sdogruyol

examples/file-upload/app.cr

@@ -4,17 +4,17 @@ require "kemal"
 post "/upload" do |env|
   # Get the uploaded file from the "image" field in the form
   # The file is initially stored in a temporary location
-  file = env.params.files["image"].tempfile
+  uploaded_file = env.params.files["image"].tempfile
 
   # Construct the destination path where we'll save the file
   # - Kemal.config.public_folder is the configured public directory
   # - "uploads/" is the subdirectory where we'll store uploads
   # - File.basename gets just the filename from the temp file path
-  file_path = ::File.join [Kemal.config.public_folder, "uploads/", File.basename(file.path)]
+  uploaded_file_path = ::File.join [Kemal.config.public_folder, "uploads/", File.basename(uploaded_file.path)]
 
   # Open the destination file for writing and copy the uploaded file to it
-  File.open(file_path, "w") do |f|
-    IO.copy(file, f)
+  File.open(uploaded_file_path, "w") do |file|
+    IO.copy(uploaded_file, file)
   end
 
   # Return a simple success message

examples/http-basic-auth/app.cr

@@ -8,7 +8,7 @@ require "kemal-basic-auth"
 basic_auth "username", "password"
 
 # Define a route for the root path "/"
-get "/" do |env|
+get "/" do |_|
   # This route will only execute if authentication is successful
   # Otherwise, the browser will show a login prompt
   "This is shown if basic auth successful."

examples/json-api/app.cr

@@ -10,7 +10,7 @@ end
 USERS = [] of Hash(String, JSON::Any)
 
 # GET - List all users
-get "/users" do |env|
+get "/users" do |_|
   USERS.to_json
 end
 
@@ -29,7 +29,9 @@ end
 # POST - Create a new user
 post "/users" do |env|
   # Parse request body as JSON
+  # ameba:disable Lint/NotNil
   user = JSON.parse(env.request.body.not_nil!.gets_to_end)
+  # ameba:enable Lint/NotNil
   USERS << user.as_h
 
   env.response.status_code = 201
@@ -42,7 +44,9 @@ put "/users/:id" do |env|
 
   if id < USERS.size
     # Parse request body as JSON
+    # ameba:disable Lint/NotNil
     updated_user = JSON.parse(env.request.body.not_nil!.gets_to_end)
+    # ameba:enable Lint/NotNil
     USERS[id] = updated_user.as_h
     updated_user.to_json
   else

examples/json-mapping/app.cr

@@ -19,7 +19,9 @@ post "/" do |env|
   # env.request.body contains the raw JSON data
   # not_nil! ensures the body exists
   # User.from_json converts the JSON string to a User object
+  # ameba:disable Lint/NotNil
   user = User.from_json env.request.body.not_nil!
+  # ameba:enable Lint/NotNil
 
   # Convert the user object back to JSON and return it
   # This creates a JSON object with username and password fields

examples/mysql-db/app.cr

@@ -20,10 +20,7 @@ class User
 end
 
 # List all users
-get "/users" do |env|
-  # Initialize empty array to store User objects
-  users = [] of User
-
+get "/users" do |_|
   # Serialize ResultSet
   users = User.from_rs(DBC.query("SELECT * FROM users"))
 

examples/postgresql-db/app.cr

@@ -20,10 +20,7 @@ class User
 end
 
 # List all users
-get "/users" do |env|
-  # Initialize empty array to store User objects
-  users = [] of User
-
+get "/users" do |_|
   # Serialize ResultSet
   users = User.from_rs(DBC.query("SELECT * FROM users"))
 

examples/reuse-port/app.cr

@@ -8,7 +8,9 @@ end
 # Start Kemal with custom server configuration
 Kemal.run do |config|
   # Get the server instance from the config
+  # ameba:disable Lint/NotNil
   server = config.server.not_nil!
+  # ameba:enable Lint/NotNil
 
   # Bind the server to port 3000 with reuse_port enabled
   # reuse_port: true allows multiple processes to listen on the same port

examples/unix-domain-socket/app.cr

@@ -3,7 +3,9 @@ require "kemal"
 # Start Kemal with custom server configuration to use Unix Domain Socket
 Kemal.run do |config|
   # Get the server instance from the config
+  # ameba:disable Lint/NotNil
   server = config.server.not_nil!
+  # ameba:enable Lint/NotNil
 
   # Bind the server to a Unix Domain Socket instead of TCP port
   # Unix Domain Sockets provide faster inter-process communication on the same machine