Merge #94: Add ProgressReporter for multi-step command operations

7112dfb style: apply cargo fmt formatting (copilot-swe-agent[bot])
efe20cc feat: integrate ProgressReporter with create and destroy commands (copilot-swe-agent[bot])
7705383 feat: add ProgressReporter for long-running operations (copilot-swe-agent[bot])
90ae761 Initial plan (copilot-swe-agent[bot])

Pull request description:

  Commands previously provided no progress feedback during long-running operations, leaving users unable to distinguish between stuck and actively processing operations.

  ## Changes

  ### Core Implementation
  - **`ProgressReporter`** (`src/presentation/progress.rs`): New abstraction for standardized progress tracking with step numbering, timing, and sub-step support. Wraps `UserOutput` and maintains step state.
  - **`CommandContext.into_output()`**: Enables consuming context to extract `UserOutput` for ownership transfer to `ProgressReporter`.

  ### Command Integration
  - **Create command**: 3-step progression (load config → initialize → create environment) with timing per step
  - **Destroy command**: 3-step progression (validate → initialize → tear down) with timing per step

  ## Output Format

  ```
  ⏳ [1/3] Loading configuration...
    ✓ Configuration loaded: demo-env (took 150ms)
  ⏳ [2/3] Initializing dependencies...
    ✓ Done (took 23ms)
  ⏳ [3/3] Creating environment...
      → Creating virtual machine
      → Configuring network
    ✓ Instance created: vm-demo-env (took 2.3s)
  ✅ Environment 'demo-env' created successfully
  ```

  Duration formatting: `<1s` shown as milliseconds, `≥1s` shown as seconds with one decimal place.

  ## Testing
  12 unit tests for `ProgressReporter` covering step tracking, timing, sub-steps, and verbosity handling. All existing command tests (15 total) updated and passing.

  <!-- START COPILOT CODING AGENT SUFFIX -->

  <details>

  <summary>Original prompt</summary>

  ----

  *This section details on the original issue you should resolve*

  <issue_title>Add Progress Reporter for Long-Running Operations</issue_title>
  <issue_description>**Parent Issue**: #63
  **Type**: 🚀 Advanced Pattern
  **Impact**: 🟢🟢 Medium
  **Effort**: 🔵🔵🔵 High
  **Priority**: P2

  ## Problem

  Commands currently have no mechanism to report progress during long-running operations:

  - Users see no feedback during lengthy operations
  - No indication of current step or overall progress
  - Hard to know if the operation is stuck or progressing
  - Poor user experience for operations that take minutes

  Current behavior:
  ```rust
  output.progress("Creating environment...");
  // Long operation happens with no updates
  // User sees nothing until completion
  output.success("Environment created!");
  ```

  ## Proposed Solution

  Create a `ProgressReporter` abstraction for standardized progress reporting:

  ```rust
  //! Progress Reporting for Long-Running Operations

  use std::time::{Duration, Instant};

  /// Progress reporter for multi-step operations
  pub struct ProgressReporter {
      output: UserOutput,
      total_steps: usize,
      current_step: usize,
      step_start: Option<Instant>,
  }

  impl ProgressReporter {
      pub fn new(output: UserOutput, total_steps: usize) -> Self {
          Self {
              output,
              total_steps,
              current_step: 0,
              step_start: None,
          }
      }

      /// Start a new step with a description
      pub fn start_step(&mut self, description: &str) {
          self.current_step += 1;
          self.step_start = Some(Instant::now());

          self.output.progress(&format!(
              "[{}/{}] {}...",
              self.current_step,
              self.total_steps,
              description
          ));
      }

      /// Complete the current step with optional result message
      pub fn complete_step(&mut self, result: Option<&str>) {
          if let Some(start) = self.step_start {
              let duration = start.elapsed();

              if let Some(msg) = result {
                  self.output.result(&format!(
                      "  ✓ {} (took {:?})",
                      msg,
                      duration
                  ));
              } else {
                  self.output.result(&format!("  ✓ Done (took {:?})", duration));
              }
          }

          self.step_start = None;
      }

      /// Report a sub-step within the current step
      pub fn sub_step(&mut self, description: &str) {
          self.output.info(&format!("    → {}", description));
      }

      /// Complete all steps and show summary
      pub fn complete(&mut self, summary: &str) {
          self.output.success(summary);
      }
  }
  ```

  Then use in command handlers:
  ```rust
  pub fn handle_environment_creation(env_file: &Path, working_dir: &Path)
      -> Result<(), CreateSubcommandError>
  {
      let output = output::create_default();
      let mut progress = ProgressReporter::new(output, 5);

      // Step 1: Load configuration
      progress.start_step("Loading configuration");
      let config = load_configuration(env_file)?;
      progress.complete_step(Some(&format!("Configuration loaded: {}", config.environment.name)));

      // Step 2: Create dependencies
      progress.start_step("Initializing dependencies");
      let context = CommandContext::new(working_dir.to_path_buf());
      progress.complete_step(None);

      // Step 3: Validate environment
      progress.start_step("Validating environment");
      validate_environment(&config)?;
      progress.complete_step(Some("Environment is valid"));

      // Step 4: Provision infrastructure
      progress.start_step("Provisioning infrastructure");
      progress.sub_step("Creating virtual machine");
      progress.sub_step("Configuring network");
      let instance = provision_infrastructure(&config)?;
      progress.complete_step(Some(&format!("Instance created: {}", instance.name)));

      // Step 5: Finalize
      progress.start_step("Finalizing environment");
      let environment = finalize_environment(config, instance)?;
      progress.complete_step(None);

      progress.complete(&format!(
          "Environment '{}' created successfully",
          environment.name()
      ));

      Ok(())
  }
  ```

  ## Benefits

  - ✅ Clear progress feedback for users
  - ✅ Shows current step and overall progress
  - ✅ Reports timing for each step
  - ✅ Consistent progress reporting across commands
  - ✅ Better user experience for long operations
  - ✅ Helps identify slow steps

  ## Implementation Checklist

  **Phase 1: Create progress reporter**
  - [ ] Create `src/presentation/progress.rs`
  - [ ] Implement `ProgressReporter` struct
  - [ ] Add `new()` constructor
  - [ ] Add `start_step()` method
  - [ ] Add `complete_step()` method
  - [ ] Add `sub_step()` method
  - [ ] Add `complete()` method
  - [ ] Add comprehensive documentation
  - [ ] Write unit tests

  **Phase 2: Integrate with create command**
  - [ ] Identify steps in environment creation
  - [ ] Add progress reporting to each step
  - [ ] Test with real operations
  - [ ...

  </details>

  - Fixes #73

  <!-- START COPILOT CODING AGENT TIPS -->
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ACKs for top commit:
  josecelano:
    ACK 7112dfb

Tree-SHA512: 3283d6bcb5a135d09cd2c7ac2617d90fbc8e483ae48af03b751afe4805cfa0b15427dfb8d6d2d2ebd5a7afe789db74f3b09e37b2d851e0428feadd74e297d178

Author: josecelano

src/presentation/commands/context.rs

@@ -254,6 +254,26 @@ impl CommandContext {
     pub fn output(&mut self) -> &mut UserOutput {
         &mut self.output
     }
+
+    /// Consume the context and return the user output
+    ///
+    /// This method is useful when you want to pass ownership of the output
+    /// to another component, such as a `ProgressReporter`.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// use std::path::PathBuf;
+    /// use torrust_tracker_deployer_lib::presentation::commands::context::CommandContext;
+    /// use torrust_tracker_deployer_lib::presentation::progress::ProgressReporter;
+    ///
+    /// let ctx = CommandContext::new(PathBuf::from("."));
+    /// let progress = ProgressReporter::new(ctx.into_output(), 3);
+    /// ```
+    #[must_use]
+    pub fn into_output(self) -> UserOutput {
+        self.output
+    }
 }
 
 /// Report an error through user output

src/presentation/commands/create/subcommands/environment.rs

@@ -9,21 +9,23 @@ use crate::application::command_handlers::create::config::EnvironmentCreationCon
 use crate::domain::Environment;
 use crate::presentation::commands::context::report_error;
 use crate::presentation::commands::factory::CommandHandlerFactory;
+use crate::presentation::progress::ProgressReporter;
 use crate::presentation::user_output::UserOutput;
 
 use super::super::config_loader::ConfigLoader;
 use super::super::errors::CreateSubcommandError;
 
 /// Handle environment creation from configuration file
 ///
-/// This function orchestrates the environment creation workflow by delegating
-/// to focused step functions:
+/// This function orchestrates the environment creation workflow with progress reporting:
 ///
 /// 1. Load configuration from file
-/// 2. Execute create command
-/// 3. Display creation results
+/// 2. Initialize dependencies
+/// 3. Validate environment
+/// 4. Execute create command
+/// 5. Display creation results
 ///
-/// Each step is implemented as a separate function for clarity and testability.
+/// Each step is tracked and timed using `ProgressReporter` for clear user feedback.
 ///
 /// # Arguments
 ///
@@ -47,17 +49,41 @@ pub fn handle_environment_creation(
     working_dir: &Path,
 ) -> Result<(), CreateSubcommandError> {
     let factory = CommandHandlerFactory::new();
-    let mut ctx = factory.create_context(working_dir.to_path_buf());
+    let ctx = factory.create_context(working_dir.to_path_buf());
+
+    // Create progress reporter for 3 main steps
+    let mut progress = ProgressReporter::new(ctx.into_output(), 3);
 
     // Step 1: Load configuration
-    let config = load_configuration(ctx.output(), env_file)?;
+    progress.start_step("Loading configuration");
+    let config = load_configuration(progress.output(), env_file)?;
+    progress.complete_step(Some(&format!(
+        "Configuration loaded: {}",
+        config.environment.name
+    )));
 
-    // Step 2: Execute command (create handler before borrowing output)
+    // Step 2: Initialize dependencies
+    progress.start_step("Initializing dependencies");
+    let ctx = factory.create_context(working_dir.to_path_buf());
     let command_handler = factory.create_create_handler(&ctx);
-    let environment = execute_create_command(ctx.output(), &command_handler, config)?;
+    progress.complete_step(None);
+
+    // Step 3: Execute create command (provision infrastructure)
+    progress.start_step("Creating environment");
+    let environment = execute_create_command(progress.output(), &command_handler, config)?;
+    progress.complete_step(Some(&format!(
+        "Instance created: {}",
+        environment.instance_name().as_str()
+    )));
+
+    // Complete with summary
+    progress.complete(&format!(
+        "Environment '{}' created successfully",
+        environment.name().as_str()
+    ));
 
-    // Step 3: Display results
-    display_creation_results(ctx.output(), &environment);
+    // Display final results
+    display_creation_results(progress.output(), &environment);
 
     Ok(())
 }

src/presentation/commands/destroy/handler.rs

@@ -6,16 +6,18 @@
 use crate::domain::environment::name::EnvironmentName;
 use crate::presentation::commands::context::report_error;
 use crate::presentation::commands::factory::CommandHandlerFactory;
+use crate::presentation::progress::ProgressReporter;
 
 use super::errors::DestroySubcommandError;
 
 /// Handle the destroy command
 ///
-/// This function orchestrates the environment destruction workflow by:
+/// This function orchestrates the environment destruction workflow with progress reporting:
 /// 1. Validating the environment name
-/// 2. Loading the environment from persistent storage
-/// 3. Executing the destroy command handler
-/// 4. Providing user-friendly progress updates
+/// 2. Tearing down infrastructure
+/// 3. Cleaning up resources
+///
+/// Each step is tracked and timed using `ProgressReporter` for clear user feedback.
 ///
 /// # Arguments
 ///
@@ -53,39 +55,45 @@ pub fn handle_destroy_command(
 ) -> Result<(), DestroySubcommandError> {
     // Create factory and context with all shared dependencies
     let factory = CommandHandlerFactory::new();
-    let mut ctx = factory.create_context(working_dir.to_path_buf());
+    let ctx = factory.create_context(working_dir.to_path_buf());
 
-    // Display initial progress (to stderr)
-    ctx.output()
-        .progress(&format!("Destroying environment '{environment_name}'..."));
+    // Create progress reporter for 3 main steps
+    let mut progress = ProgressReporter::new(ctx.into_output(), 3);
 
-    // Validate environment name
+    // Step 1: Validate environment name
+    progress.start_step("Validating environment");
     let env_name = EnvironmentName::new(environment_name.to_string()).map_err(|source| {
         let error = DestroySubcommandError::InvalidEnvironmentName {
             name: environment_name.to_string(),
             source,
         };
-        report_error(ctx.output(), &error);
+        report_error(progress.output(), &error);
         error
     })?;
+    progress.complete_step(Some(&format!(
+        "Environment name validated: {environment_name}"
+    )));
 
-    // Create and execute destroy command handler
-    ctx.output().progress("Tearing down infrastructure...");
-
+    // Step 2: Initialize dependencies
+    progress.start_step("Initializing dependencies");
+    let ctx = factory.create_context(working_dir.to_path_buf());
     let command_handler = factory.create_destroy_handler(&ctx);
+    progress.complete_step(None);
 
-    // Execute destroy - the handler will load the environment and handle all states internally
+    // Step 3: Execute destroy command (tear down infrastructure)
+    progress.start_step("Tearing down infrastructure");
     let _destroyed_env = command_handler.execute(&env_name).map_err(|source| {
         let error = DestroySubcommandError::DestroyOperationFailed {
             name: environment_name.to_string(),
             source,
         };
-        report_error(ctx.output(), &error);
+        report_error(progress.output(), &error);
         error
     })?;
+    progress.complete_step(Some("Infrastructure torn down"));
 
-    ctx.output().progress("Cleaning up resources...");
-    ctx.output().success(&format!(
+    // Complete with summary
+    progress.complete(&format!(
         "Environment '{environment_name}' destroyed successfully"
     ));
 

src/presentation/mod.rs

@@ -41,6 +41,7 @@
 pub mod cli;
 pub mod commands;
 pub mod errors;
+pub mod progress;
 pub mod user_output;
 
 // Re-export commonly used presentation types for convenience
@@ -49,4 +50,5 @@ pub use commands::create::CreateSubcommandError;
 pub use commands::destroy::DestroySubcommandError;
 pub use commands::{execute, handle_error};
 pub use errors::CommandError;
+pub use progress::ProgressReporter;
 pub use user_output::{UserOutput, VerbosityLevel};