feat: ability to delete a project (#37)

migrations/2024-08-19-105140_create_tasks/up.sql

@@ -6,6 +6,6 @@ CREATE TABLE "tasks"(
 	"deadline" DATE,
 	"category" JSONB NOT NULL,
 	"project_id" INT4,
-	FOREIGN KEY ("project_id") REFERENCES "projects"("id")
+	FOREIGN KEY ("project_id") REFERENCES "projects"("id") ON DELETE SET NULL
 );
 

src/components/project_form.rs

@@ -1,10 +1,10 @@
 use crate::models::project::{NewProject, Project};
-use crate::server::projects::{create_project, edit_project};
+use crate::query::{QueryErrors, QueryKey, QueryValue};
+use crate::server::projects::{create_project, delete_project, edit_project};
 use dioxus::core_macro::{component, rsx};
 use dioxus::dioxus_core::Element;
 use dioxus::prelude::*;
 use dioxus_query::prelude::use_query_client;
-use crate::query::{QueryErrors, QueryKey, QueryValue};
 
 #[component]
 pub(crate) fn ProjectForm(project: Option<Project>, on_successful_submit: EventHandler<()>)
@@ -25,9 +25,7 @@ pub(crate) fn ProjectForm(project: Option<Project>, on_successful_submit: EventH
                     } else {
                         let _ = create_project(new_project).await;
                     }
-                    query_client.invalidate_queries(&[
-                        QueryKey::Projects
-                    ]);
+                    query_client.invalidate_queries(&[QueryKey::Projects]);
                     on_successful_submit.call(());
                 }
             },
@@ -44,14 +42,31 @@ pub(crate) fn ProjectForm(project: Option<Project>, on_successful_submit: EventH
                 input {
                     name: "title",
                     required: true,
-                    initial_value: project.map(|project| project.title().to_owned()),
+                    initial_value: project.as_ref().map(|project| project.title().to_owned()),
                     r#type: "text",
                     class: "py-2 px-3 grow bg-zinc-800/50 rounded-lg",
                     id: "input_title"
                 }
             }
             div {
-                class: "flex flex-row justify-end mt-auto",
+                class: "flex flex-row justify-between mt-auto",
+                button {
+                    r#type: "button",
+                    class: "py-2 px-4 bg-zinc-300/50 rounded-lg",
+                    onclick: move |_| {
+                        let project = project.clone();
+                        async move {
+                            if let Some(project) = project {
+                                let _ = delete_project(project.id()).await;
+                                query_client.invalidate_queries(&[QueryKey::Projects]);
+                            }
+                            on_successful_submit.call(());
+                        }
+                    },
+                    i {
+                        class: "fa-solid fa-trash-can"
+                    }
+                }
                 button {
                     r#type: "submit",
                     class: "py-2 px-4 bg-zinc-300/50 rounded-lg",

src/errors/error.rs

@@ -7,11 +7,17 @@ pub enum Error {
     ServerInternal,
 }
 
+impl From<diesel::result::Error> for Error {
+    fn from(_: diesel::result::Error) -> Self { 
+        Self::ServerInternal 
+    }
+}
+
 // has to be implemented for Dioxus server functions
 impl Display for Error {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
-            Error::ServerInternal => write!(f, "internal server error"),
+            Self::ServerInternal => write!(f, "internal server error"),
         }
     }
 }
@@ -22,7 +28,7 @@ impl FromStr for Error {
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         Ok(match s {
-            "internal server error" => Error::ServerInternal,
+            "internal server error" => Self::ServerInternal,
             _ => return Err(()),
         })
     }

src/errors/project_error.rs

@@ -36,7 +36,7 @@ impl From<ValidationErrors> for ErrorVec<ProjectError> {
 
 impl From<diesel::result::Error> for ProjectError {
     fn from(_: diesel::result::Error) -> Self {
-        ProjectError::Error(Error::ServerInternal)
+        Self::Error(Error::ServerInternal)
     }
 }
 
@@ -52,6 +52,6 @@ impl FromStr for ProjectError {
     type Err = ();
 
     fn from_str(_: &str) -> Result<Self, Self::Err> {
-        Ok(ProjectError::Error(Error::ServerInternal))
+        Ok(Self::Error(Error::ServerInternal))
     }
 }

src/errors/task_error.rs

@@ -42,12 +42,12 @@ impl From<diesel::result::Error> for TaskError {
                 diesel::result::DatabaseErrorKind::ForeignKeyViolation, info
             ) => {
                 match info.constraint_name() {
-                    Some("tasks_project_id_fkey") => TaskError::ProjectNotFound,
-                    _ => TaskError::Error(Error::ServerInternal)
+                    Some("tasks_project_id_fkey") => Self::ProjectNotFound,
+                    _ => Self::Error(Error::ServerInternal)
                 }
             }
             _ => {
-                TaskError::Error(Error::ServerInternal)
+                Self::Error(Error::ServerInternal)
             }
         }
     }
@@ -65,6 +65,6 @@ impl FromStr for TaskError {
     type Err = ();
 
     fn from_str(_: &str) -> Result<Self, Self::Err> {
-        Ok(TaskError::Error(Error::ServerInternal))
+        Ok(Self::Error(Error::ServerInternal))
     }
 }

src/server/projects.rs

@@ -71,3 +71,17 @@ pub(crate) async fn edit_project(project_id: i32, new_project: NewProject)
 
     Ok(updated_project)
 }
+
+#[server]
+pub(crate) async fn delete_project(project_id: i32)
+    -> Result<(), ServerFnError<ErrorVec<Error>>> {
+    use crate::schema::projects::dsl::*;
+
+    let mut connection = establish_database_connection()
+        .map_err::<ErrorVec<Error>, _>(|_| vec![Error::ServerInternal].into())?;
+
+    diesel::delete(projects.filter(id.eq(project_id))).execute(&mut connection)
+        .map_err::<ErrorVec<Error>, _>(|error| vec![error.into()].into())?;
+    
+    Ok(())
+}