Started work on permissions

build.rs

@@ -0,0 +1,6 @@
+// generated by `sqlx migrate build-script`
+fn main() {
+    // trigger recompilation when a new migration is added
+    println!("cargo:rerun-if-changed=migrations");
+    println!("cargo:rerun-if-changed=sql");
+}

sql/get_all_permissions_for_folder.sql

@@ -0,0 +1,8 @@
+SELECT
+    username,
+    permission_type as "permission_type: PermissionRaw"
+FROM
+    permissions
+    INNER JOIN users ON permissions.user_id = users.user_id
+WHERE
+    folder_id = $1

sql/get_permissions_for_folder.sql

@@ -0,0 +1,15 @@
+SELECT
+    permission_type as "permission_type: PermissionRaw"
+FROM
+    permissions
+WHERE
+    folder_id = $1
+    AND user_id = $2
+UNION
+SELECT
+    'manage' as "permission_type: PermissionRaw"
+FROM
+    folders
+WHERE
+    folder_id = $1
+    AND owner_id = $2

sql/insert_permission.sql

@@ -0,0 +1,24 @@
+WITH RECURSIVE folder_hierarchy AS (
+    -- Start with the given directory
+    SELECT 
+        folder_id 
+    FROM 
+        folders 
+    WHERE 
+        folder_id = $1
+
+    UNION ALL
+
+    -- Recursively find all subdirectories
+    SELECT 
+        f.folder_id
+    FROM 
+        folders f
+    INNER JOIN 
+        folder_hierarchy fh ON f.parent_folder_id = fh.folder_id
+)
+INSERT INTO permissions(user_id, folder_id, permission_type)
+SELECT $2::integer as user_id, fh.folder_id::UUID as folder_id, $3
+FROM folder_hierarchy fh
+ON CONFLICT (user_id, folder_id) DO UPDATE
+SET permission_type = $3

src/db/file.rs

@@ -47,19 +47,23 @@ pub async fn get_files(folder_id: Uuid, pool: &Pool) -> sqlx::Result<Vec<FileWit
         .await
 }
 
+async fn get_folder_id(file_id: Uuid, pool: &Pool) -> sqlx::Result<Option<Uuid>> {
+    let uuid = sqlx::query!("SELECT folder_id FROM files WHERE file_id = $1", file_id)
+        .fetch_optional(pool)
+        .await?
+        .map(|record| record.folder_id);
+    Ok(uuid)
+}
+
 pub async fn get_permissions(
     file_id: Uuid,
     user_id: i32,
     pool: &Pool,
 ) -> sqlx::Result<PermissionType> {
-    let record = sqlx::query!(
-        "SELECT file_id FROM files JOIN folders ON files.folder_id = folders.folder_id WHERE file_id = $1 AND owner_id = $2",
-        file_id,
-        user_id
-    )
-    .fetch_optional(pool)
-    .await?;
-    Ok(record.map(|_| PermissionType::Write).unwrap_or_default())
+    match get_folder_id(file_id, pool).await? {
+        Some(folder_id) => super::folder::get_permissions(folder_id, user_id, pool).await,
+        None => Ok(PermissionType::default()),
+    }
 }
 
 pub async fn get_name(file_id: Uuid, pool: &Pool) -> sqlx::Result<Option<String>> {

src/db/folder.rs

@@ -3,7 +3,7 @@ use std::collections::HashSet;
 use futures::TryStreamExt;
 use uuid::Uuid;
 
-use crate::Pool;
+use crate::{db::permissions::PermissionRaw, Pool};
 
 use super::permissions::PermissionType;
 
@@ -12,16 +12,11 @@ pub async fn get_permissions(
     user_id: i32,
     pool: &Pool,
 ) -> sqlx::Result<PermissionType> {
-    let permission = sqlx::query!(
-        "SELECT folder_id FROM folders WHERE folder_id = $1 AND owner_id = $2",
-        folder_id,
-        user_id
-    )
-    .fetch_optional(pool)
-    .await?
-    .map(|_| PermissionType::Write)
-    .unwrap_or_default();
-    Ok(permission)
+    let permission = sqlx::query_file!("sql/get_permissions_for_folder.sql", folder_id, user_id)
+        .fetch_optional(pool)
+        .await?
+        .and_then(|record| record.permission_type);
+    Ok(permission.into())
 }
 
 pub async fn get_names(folder_id: Uuid, pool: &Pool) -> sqlx::Result<HashSet<String>> {

src/db/permissions.rs

@@ -1,9 +1,16 @@
-use axum::http::StatusCode;
+use std::collections::HashMap;
 
-#[derive(sqlx::Type)]
-#[sqlx(type_name = "permission", rename_all = "lowercase")]
-pub(super) enum PermissionRaw {
-    Read,
+use axum::http::StatusCode;
+use futures::TryStreamExt as _;
+use uuid::Uuid;
+
+use crate::Pool;
+
+#[derive(sqlx::Type, Debug)]
+#[sqlx(type_name = "permission")]
+#[sqlx(rename_all = "lowercase")]
+pub enum PermissionRaw {
+    Read = 1,
     Write,
     Manage,
 }
@@ -29,6 +36,17 @@ impl From<Option<PermissionRaw>> for PermissionType {
     }
 }
 
+impl From<PermissionType> for PermissionRaw {
+    fn from(value: PermissionType) -> Self {
+        match value {
+            PermissionType::Manage => Self::Manage,
+            PermissionType::Write => Self::Write,
+            PermissionType::Read => Self::Read,
+            PermissionType::NoPermission => unreachable!(),
+        }
+    }
+}
+
 impl PermissionType {
     pub fn can_read(self) -> bool {
         self >= PermissionType::Read
@@ -57,3 +75,32 @@ impl PermissionType {
         Ok(())
     }
 }
+
+pub async fn insert_permissions(
+    user_id: i32,
+    folder_id: Uuid,
+    permission_type: PermissionType,
+    pool: &Pool,
+) -> sqlx::Result<()> {
+    let permission_type = PermissionRaw::from(permission_type);
+    sqlx::query_file!(
+        "sql/insert_permission.sql",
+        folder_id,
+        user_id,
+        permission_type as PermissionRaw
+    )
+    .execute(pool)
+    .await
+    .map(|_| ())
+}
+
+pub async fn get_permissions_for_folder(
+    folder_id: Uuid,
+    pool: &Pool,
+) -> sqlx::Result<HashMap<String, PermissionType>> {
+    sqlx::query_file!("sql/get_all_permissions_for_folder.sql", folder_id)
+        .fetch(pool)
+        .map_ok(|record| (record.username, Some(record.permission_type).into()))
+        .try_collect()
+        .await
+}

src/endpoints/file/modify.rs

@@ -27,14 +27,12 @@ pub async fn modify(
         }
     };
 
-    let Some(mut file) = state
+    let mut file = state
         .storage
         .write(params.file_id)
         .await
         .handle_internal()?
-    else {
-        return Err(StatusCode::NOT_FOUND);
-    };
+        .ok_or(StatusCode::NOT_FOUND)?;
 
     let (hash, size) = match crate::FileStorage::write_to_file(&mut file, &mut field).await {
         Ok(values) => values,