Implement get tasks.

backend/src/services/mod.rs

@@ -13,6 +13,7 @@ pub enum AppError {
     InternalError(anyhow::Error),
     JsonExtractError(JsonRejection),
     PathError(PathRejection),
+    Unprocessable(String),
     NotFound,
 }
 
@@ -36,6 +37,11 @@ impl IntoResponse for AppError {
                 }),
             )
                 .into_response(),
+            Self::Unprocessable(msg) => (
+                StatusCode::UNPROCESSABLE_ENTITY,
+                Json(ErrorJson { error: msg }),
+            )
+                .into_response(),
             Self::PathError(rej) => (
                 StatusCode::BAD_REQUEST,
                 Json(ErrorJson {

backend/src/services/tasks.rs

@@ -10,14 +10,17 @@ use serde::Deserialize;
 use sqlx::{Pool, Sqlite};
 use uuid::Uuid;
 
-use crate::models::TaskModel;
+use crate::models::{TaskModel, TaskStatus};
 
 use super::AppError;
 
 pub fn create_task_router() -> Router<Pool<Sqlite>> {
     Router::new()
-        .route("/", post(create_task))
+        .route("/", post(create_task).get(list_tasks))
-        .route("/{task_id}", get(get_task))
+        .route(
+            "/{task_id}",
+            get(get_task).put(update_task).delete(delete_task),
+        )
 }
 
 #[derive(Deserialize)]
@@ -37,6 +40,14 @@ pub async fn create_task(
     Ok((StatusCode::CREATED, Json(model)))
 }
 
+pub async fn list_tasks(
+    State(pool): State<Pool<Sqlite>>,
+) -> Result<(StatusCode, Json<Vec<TaskModel>>), AppError> {
+    let tasks = TaskModel::list_all(&pool).await?;
+
+    Ok((StatusCode::OK, Json(tasks)))
+}
+
 pub async fn get_task(
     State(pool): State<Pool<Sqlite>>,
     WithRejection(Path(task_id), _): WithRejection<Path<Uuid>, AppError>,
@@ -45,3 +56,51 @@ pub async fn get_task(
 
     Ok((StatusCode::OK, Json(model)))
 }
+
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct UpdateTaskRequest {
+    title: Option<String>,
+    description: Option<String>,
+    status: Option<TaskStatus>,
+}
+
+pub async fn update_task(
+    State(pool): State<Pool<Sqlite>>,
+    WithRejection(Path(task_id), _): WithRejection<Path<Uuid>, AppError>,
+    WithRejection(Json(input), _): WithRejection<Json<UpdateTaskRequest>, AppError>,
+) -> Result<(StatusCode, Json<TaskModel>), AppError> {
+    let mut model = TaskModel::get_by_id(&pool, task_id).await?;
+
+    if let Some(title) = input.title {
+        if title.len() == 0 {
+            return Err(AppError::Unprocessable(
+                "Title must not be empty".to_string(),
+            ));
+        }
+        model.title = title;
+    }
+
+    if let Some(description) = input.description {
+        model.description = Some(description);
+    }
+
+    if let Some(status) = input.status {
+        model.status = status;
+    }
+
+    let model = model.update(&pool).await?;
+
+    Ok((StatusCode::OK, Json(model)))
+}
+
+pub async fn delete_task(
+    State(pool): State<Pool<Sqlite>>,
+    WithRejection(Path(task_id), _): WithRejection<Path<Uuid>, AppError>,
+) -> Result<StatusCode, AppError> {
+    // Ensure that the task exists.
+    TaskModel::get_by_id(&pool, task_id).await?;
+    TaskModel::delete(&pool, task_id).await?;
+
+    Ok(StatusCode::NO_CONTENT)
+}

backend/tests/api/delete_tasks.hurl

@@ -0,0 +1,92 @@
+# Task Delete API Tests
+
+# Setup: Create a task to delete
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Task to Delete",
+  "description": "This task will be deleted"
+}
+
+HTTP 201
+[Captures]
+delete_task_id: jsonpath "$.id"
+
+# Test: Delete task successfully
+DELETE {{host}}/api/tasks/{{delete_task_id}}
+
+HTTP 204
+
+# Test: Verify task is deleted (should return 404)
+GET {{host}}/api/tasks/{{delete_task_id}}
+
+HTTP 404
+[Asserts]
+jsonpath "$.error" exists
+
+# Setup: Create another task for additional tests
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Another Task to Delete"
+}
+
+HTTP 201
+[Captures]
+another_task_id: jsonpath "$.id"
+
+# Test: Verify task exists before deletion
+GET {{host}}/api/tasks/{{another_task_id}}
+
+HTTP 200
+[Asserts]
+jsonpath "$.title" == "Another Task to Delete"
+
+# Test: Delete the task
+DELETE {{host}}/api/tasks/{{another_task_id}}
+
+HTTP 204
+
+# Test: Confirm task no longer exists
+GET {{host}}/api/tasks/{{another_task_id}}
+
+HTTP 404
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Delete non-existent task
+DELETE {{host}}/api/tasks/00000000-0000-0000-0000-000000000000
+
+HTTP 404
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Delete with invalid UUID format
+DELETE {{host}}/api/tasks/invalid-uuid-format
+
+HTTP 400
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Multiple deletions of same task (idempotency test)
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Task for Idempotency Test"
+}
+
+HTTP 201
+[Captures]
+idempotent_task_id: jsonpath "$.id"
+
+# First deletion should succeed
+DELETE {{host}}/api/tasks/{{idempotent_task_id}}
+
+HTTP 204
+
+# Second deletion should return 404 (task already gone)
+DELETE {{host}}/api/tasks/{{idempotent_task_id}}
+
+HTTP 404
+[Asserts]
+jsonpath "$.error" exists

backend/tests/api/list_tasks.hurl

@@ -0,0 +1,143 @@
+# Task List API Tests
+
+# Test: Get task list (may or may not be empty)
+GET {{host}}/api/tasks
+
+HTTP 200
+[Captures]
+initial_count: jsonpath "$" count 
+[Asserts]
+jsonpath "$" isCollection
+
+# Setup: Create multiple tasks with different properties
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Test Task Alpha",
+  "description": "Alpha task description"
+}
+
+HTTP 201
+[Captures]
+alpha_task_id: jsonpath "$.id"
+alpha_created_at: jsonpath "$.created_at"
+
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Test Task Beta"
+}
+
+HTTP 201
+[Captures]
+beta_task_id: jsonpath "$.id"
+beta_created_at: jsonpath "$.created_at"
+
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Test Task Gamma",
+  "description": "Gamma task with description"
+}
+
+HTTP 201
+[Captures]
+gamma_task_id: jsonpath "$.id"
+gamma_created_at: jsonpath "$.created_at"
+
+# Test: List includes our newly created tasks
+GET {{host}}/api/tasks
+
+HTTP 200
+[Asserts]
+jsonpath "$" isCollection
+jsonpath "$" count >= {{initial_count}}
+jsonpath "$[*].id" includes "{{alpha_task_id}}"
+jsonpath "$[*].id" includes "{{beta_task_id}}"
+jsonpath "$[*].id" includes "{{gamma_task_id}}"
+jsonpath "$[*].title" includes "Test Task Alpha"
+jsonpath "$[*].title" includes "Test Task Beta"
+jsonpath "$[*].title" includes "Test Task Gamma"
+
+# Test: Verify all tasks have required fields
+GET {{host}}/api/tasks
+
+HTTP 200
+[Asserts]
+jsonpath "$[?(@.id=='{{alpha_task_id}}')].title" exists
+jsonpath "$[?(@.id=='{{alpha_task_id}}')].status" exists
+jsonpath "$[?(@.id=='{{alpha_task_id}}')].created_at" exists
+jsonpath "$[?(@.id=='{{alpha_task_id}}')].updated_at" exists
+jsonpath "$[?(@.id=='{{beta_task_id}}')].title" exists
+jsonpath "$[?(@.id=='{{beta_task_id}}')].status" exists
+jsonpath "$[?(@.id=='{{beta_task_id}}')].created_at" exists
+jsonpath "$[?(@.id=='{{beta_task_id}}')].updated_at" exists
+
+# Test: Verify our tasks have correct initial values
+GET {{host}}/api/tasks
+
+HTTP 200
+[Asserts]
+jsonpath "$[?(@.id=='{{alpha_task_id}}')].title" nth 0 == "Test Task Alpha"
+jsonpath "$[?(@.id=='{{alpha_task_id}}')].description" nth 0 == "Alpha task description"
+jsonpath "$[?(@.id=='{{alpha_task_id}}')].status" nth 0 == "todo"
+jsonpath "$[?(@.id=='{{beta_task_id}}')].title" nth 0 == "Test Task Beta"
+jsonpath "$[?(@.id=='{{beta_task_id}}')].description" nth 0 == null
+jsonpath "$[?(@.id=='{{beta_task_id}}')].status" nth 0 == "todo"
+
+# Setup: Update tasks to test mixed statuses
+PUT {{host}}/api/tasks/{{beta_task_id}}
+Content-Type: application/json
+{
+  "status": "done"
+}
+
+HTTP 200
+
+PUT {{host}}/api/tasks/{{gamma_task_id}}
+Content-Type: application/json
+{
+  "status": "backlog"
+}
+
+HTTP 200
+
+# Test: List shows updated statuses
+GET {{host}}/api/tasks
+
+HTTP 200
+[Asserts]
+jsonpath "$[?(@.id=='{{alpha_task_id}}')].status" nth 0 == "todo"
+jsonpath "$[?(@.id=='{{beta_task_id}}')].status" nth 0 == "done"
+jsonpath "$[?(@.id=='{{gamma_task_id}}')].status" nth 0 == "backlog"
+
+# Setup: Delete one task
+DELETE {{host}}/api/tasks/{{alpha_task_id}}
+
+HTTP 204
+
+# Test: Deleted task no longer appears in list
+GET {{host}}/api/tasks
+
+HTTP 200
+[Asserts]
+jsonpath "$[*].id" not includes "{{alpha_task_id}}"
+jsonpath "$[*].id" includes "{{beta_task_id}}"
+jsonpath "$[*].id" includes "{{gamma_task_id}}"
+
+# Cleanup: Delete remaining test tasks
+DELETE {{host}}/api/tasks/{{beta_task_id}}
+
+HTTP 204
+
+DELETE {{host}}/api/tasks/{{gamma_task_id}}
+
+HTTP 204
+
+# Test: Our test tasks are gone
+GET {{host}}/api/tasks
+
+HTTP 200
+[Asserts]
+jsonpath "$[*].id" not includes "{{beta_task_id}}"
+jsonpath "$[*].id" not includes "{{gamma_task_id}}"

backend/tests/api/update_tasks.hurl

@@ -0,0 +1,154 @@
+# Task Update API Tests
+
+# Setup: Create a task to update
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Original Task",
+  "description": "Original description"
+}
+
+HTTP 201
+[Captures]
+task_id: jsonpath "$.id"
+created_at: jsonpath "$.created_at"
+
+# Test: Update task title only
+PUT {{host}}/api/tasks/{{task_id}}
+Content-Type: application/json
+{
+  "title": "Updated Task Title"
+}
+
+HTTP 200
+[Asserts]
+jsonpath "$.id" == "{{task_id}}"
+jsonpath "$.title" == "Updated Task Title"
+jsonpath "$.description" == "Original description"
+jsonpath "$.status" == "todo"
+jsonpath "$.updated_at" != "{{created_at}}"
+
+# Test: Update description only
+PUT {{host}}/api/tasks/{{task_id}}
+Content-Type: application/json
+{
+  "description": "Updated description"
+}
+
+HTTP 200
+[Asserts]
+jsonpath "$.id" == "{{task_id}}"
+jsonpath "$.title" == "Updated Task Title"
+jsonpath "$.description" == "Updated description"
+jsonpath "$.status" == "todo"
+
+# Test: Update status to done
+PUT {{host}}/api/tasks/{{task_id}}
+Content-Type: application/json
+{
+  "status": "done"
+}
+
+HTTP 200
+[Asserts]
+jsonpath "$.id" == "{{task_id}}"
+jsonpath "$.status" == "done"
+jsonpath "$.completed_at" exists
+
+# Test: Update status to backlog
+PUT {{host}}/api/tasks/{{task_id}}
+Content-Type: application/json
+{
+  "status": "backlog"
+}
+
+HTTP 200
+[Asserts]
+jsonpath "$.id" == "{{task_id}}"
+jsonpath "$.status" == "backlog"
+jsonpath "$.completed_at" == null
+
+# Test: Update multiple fields together
+PUT {{host}}/api/tasks/{{task_id}}
+Content-Type: application/json
+{
+  "title": "Completely Updated Task",
+  "description": "Completely updated description",
+  "status": "done"
+}
+
+HTTP 200
+[Asserts]
+jsonpath "$.id" == "{{task_id}}"
+jsonpath "$.title" == "Completely Updated Task"
+jsonpath "$.description" == "Completely updated description"
+jsonpath "$.status" == "done"
+jsonpath "$.completed_at" exists
+
+# Test: Clear description (set to null)
+PUT {{host}}/api/tasks/{{task_id}}
+Content-Type: application/json
+{
+  "description": ""
+}
+
+HTTP 200
+[Asserts]
+jsonpath "$.id" == "{{task_id}}"
+jsonpath "$.description" == ""
+
+# Setup: Create another task for error tests
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Task for Error Tests"
+}
+
+HTTP 201
+[Captures]
+error_test_task_id: jsonpath "$.id"
+
+# Test: Update non-existent task
+PUT {{host}}/api/tasks/00000000-0000-0000-0000-000000000000
+Content-Type: application/json
+{
+  "title": "This should fail"
+}
+
+HTTP 404
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Update with invalid UUID format
+PUT {{host}}/api/tasks/invalid-uuid-format
+Content-Type: application/json
+{
+  "title": "This should also fail"
+}
+
+HTTP 400
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Update with empty title
+PUT {{host}}/api/tasks/{{error_test_task_id}}
+Content-Type: application/json
+{
+  "title": ""
+}
+
+HTTP 422
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Update with invalid status
+PUT {{host}}/api/tasks/{{error_test_task_id}}
+Content-Type: application/json
+{
+  "status": "invalid_status"
+}
+
+HTTP 422
+[Asserts]
+jsonpath "$.error" exists
+