Import the new level-one parser

This is the parser that does a raw parse of the SGF file, interpreting components but not enforcing node types.

Cargo.lock

@@ -816,7 +816,7 @@ dependencies = [
 
 [[package]]
 name = "file-service"
-version = "0.1.1"
+version = "0.2.0"
 dependencies = [
  "base64ct",
  "build_html",
@@ -4060,6 +4060,10 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "efd1f82c56340fdf16f2a953d7bda4f8fdffba13d93b00844c25572110b26079"
 
+[[package]]
+name = "tree"
+version = "0.1.0"
+
 [[package]]
 name = "try-lock"
 version = "0.2.4"

Cargo.toml

@@ -20,4 +20,5 @@ members = [
     "result-extended",
     "screenplay",
     "sgf",
+    "tree",
 ]

build.sh

@@ -23,6 +23,7 @@ RUST_ALL_TARGETS=(
     "result-extended"
     "screenplay"
     "sgf"
+    "tree"
 )
 
 build_rust_targets() {

file-service/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "file-service"
-version = "0.1.1"
+version = "0.2.0"
 authors = ["savanni@luminescent-dreams.com"]
 edition = "2018"
 

file-service/src/handlers.rs

@@ -87,7 +87,7 @@ pub async fn handle_auth(
     app: App,
     form: HashMap<String, String>,
 ) -> Result<http::Response<String>, Error> {
-    match form.get("token") {
+    match form.get("password") {
         Some(token) => match app.authenticate(AuthToken::from(token.clone())).await {
             Ok(Some(session_token)) => Response::builder()
                 .header("location", "/")
@@ -134,6 +134,25 @@ pub async fn handle_upload(
     }
 }
 
+pub async fn handle_delete(
+    app: App,
+    token: SessionToken,
+    id: FileId,
+) -> Result<http::Response<String>, Error> {
+    match app.validate_session(token).await {
+        Ok(Some(_)) => match app.delete_file(id).await {
+            Ok(_) => Response::builder()
+                .header("location", "/")
+                .status(StatusCode::SEE_OTHER)
+                .body("".to_owned()),
+            Err(_) => unimplemented!(),
+        },
+        _ => Response::builder()
+            .status(StatusCode::UNAUTHORIZED)
+            .body("".to_owned()),
+    }
+}
+
 fn serve_file<F>(
     info: FileInfo,
     file: F,

file-service/src/html.rs

@@ -74,7 +74,7 @@ impl Html for Form {
             None => "".to_owned(),
         };
         format!(
-            "<form action=\"{path}\" method=\"{method}\" {encoding}\n{elements}\n</form>\n",
+            "<form action=\"{path}\" method=\"{method}\" {encoding}>\n{elements}\n</form>\n",
             path = self.path,
             method = self.method,
             encoding = encoding,
@@ -137,11 +137,6 @@ impl Input {
         self
     }
 
-    pub fn with_value(mut self, val: &str) -> Self {
-        self.value = Some(val.to_owned());
-        self
-    }
-
     pub fn with_attributes<'a>(
         mut self,
         values: impl IntoIterator<Item = (&'a str, &'a str)>,
@@ -156,31 +151,6 @@ impl Input {
     }
 }
 
-#[derive(Clone, Debug)]
-pub struct Label {
-    target: String,
-    text: String,
-}
-
-impl Label {
-    pub fn new(target: &str, text: &str) -> Self {
-        Self {
-            target: target.to_owned(),
-            text: text.to_owned(),
-        }
-    }
-}
-
-impl Html for Label {
-    fn to_html_string(&self) -> String {
-        format!(
-            "<label for=\"{target}\">{text}</label>",
-            target = self.target,
-            text = self.text
-        )
-    }
-}
-
 #[derive(Clone, Debug)]
 pub struct Button {
     ty: Option<String>,
@@ -236,41 +206,3 @@ impl Html for Button {
         )
     }
 }
-
-#[derive(Clone, Debug)]
-pub struct Image {
-    path: String,
-    attributes: Attributes,
-}
-
-impl Image {
-    pub fn new(path: &str) -> Self {
-        Self {
-            path: path.to_owned(),
-            attributes: Attributes::default(),
-        }
-    }
-
-    pub fn with_attributes<'a>(
-        mut self,
-        values: impl IntoIterator<Item = (&'a str, &'a str)>,
-    ) -> Self {
-        self.attributes = Attributes(
-            values
-                .into_iter()
-                .map(|(a, b)| (a.to_owned(), b.to_owned()))
-                .collect::<Vec<(String, String)>>(),
-        );
-        self
-    }
-}
-
-impl Html for Image {
-    fn to_html_string(&self) -> String {
-        format!(
-            "<img src={path} {attrs} />",
-            path = self.path,
-            attrs = self.attributes.to_string()
-        )
-    }
-}

file-service/src/lib.rs

@@ -1,6 +1,6 @@
 mod store;
 
 pub use store::{
-    AuthDB, AuthError, AuthToken, FileHandle, FileId, FileInfo, ReadFileError, SessionToken, Store,
+    AuthDB, AuthError, AuthToken, DeleteFileError, FileHandle, FileId, FileInfo, ReadFileError,
-    Username, WriteFileError,
+    SessionToken, Store, Username, WriteFileError,
 };

file-service/src/main.rs

@@ -1,7 +1,7 @@
 extern crate log;
 
 use cookie::Cookie;
-use handlers::{file, handle_auth, handle_css, handle_upload, thumbnail};
+use handlers::{file, handle_auth, handle_css, handle_delete, handle_upload, thumbnail};
 use std::{
     collections::{HashMap, HashSet},
     convert::Infallible,
@@ -19,8 +19,8 @@ mod pages;
 const MAX_UPLOAD: u64 = 15 * 1024 * 1024;
 
 pub use file_service::{
-    AuthDB, AuthError, AuthToken, FileHandle, FileId, FileInfo, ReadFileError, SessionToken, Store,
+    AuthDB, AuthError, AuthToken, DeleteFileError, FileHandle, FileId, FileInfo, ReadFileError,
-    Username, WriteFileError,
+    SessionToken, Store, Username, WriteFileError,
 };
 pub use handlers::handle_index;
 
@@ -64,6 +64,11 @@ impl App {
     ) -> Result<FileHandle, WriteFileError> {
         self.store.write().await.add_file(filename, content)
     }
+
+    pub async fn delete_file(&self, id: FileId) -> Result<(), DeleteFileError> {
+        self.store.write().await.delete_file(&id)?;
+        Ok(())
+    }
 }
 
 fn with_app(app: App) -> impl Filter<Extract = (App,), Error = Infallible> + Clone {
@@ -134,6 +139,12 @@ pub async fn main() {
         .and(warp::multipart::form().max_length(MAX_UPLOAD))
         .then(handle_upload);
 
+    let delete_via_form = warp::path!("delete" / String)
+        .and(warp::post())
+        .and(with_app(app.clone()))
+        .and(with_session())
+        .then(|id, app, token| handle_delete(app, token, FileId::from(id)));
+
     let thumbnail = warp::path!(String / "tn")
         .and(warp::get())
         .and(warp::header::optional::<String>("if-none-match"))
@@ -150,6 +161,7 @@ pub async fn main() {
         root.or(styles)
             .or(auth)
             .or(upload_via_form)
+            .or(delete_via_form)
             .or(thumbnail)
             .or(file)
             .with(log),

file-service/src/pages.rs

@@ -1,16 +1,20 @@
 use crate::html::*;
 use build_html::{self, Container, ContainerType, Html, HtmlContainer};
-use file_service::{FileHandle, FileId, ReadFileError};
+use file_service::{FileHandle, FileInfo, ReadFileError};
 
 pub fn auth(_message: Option<String>) -> build_html::HtmlPage {
     build_html::HtmlPage::new()
-        .with_title("Authentication")
+        .with_title("Sign In")
         .with_stylesheet("/css")
         .with_container(
             Container::new(ContainerType::Div)
                 .with_attributes([("class", "authentication-page")])
-                .with_container(
+                .with_container(auth_form()),
-                    Container::new(ContainerType::Div)
+        )
+}
+
+fn auth_form() -> Container {
+    Container::default()
         .with_attributes([("class", "card authentication-form")])
         .with_html(
             Form::new()
@@ -18,18 +22,17 @@ pub fn auth(_message: Option<String>) -> build_html::HtmlPage {
                 .with_method("post")
                 .with_container(
                     Container::new(ContainerType::Div)
-                                        .with_attributes([("class", "authentication-form__label")])
-                                        .with_html(Label::new("for-token-input", "Authentication")),
-                                )
-                                .with_container(
-                                    Container::new(ContainerType::Div)
-                                        .with_attributes([("class", "authentication-form__input")])
                         .with_html(
-                                            Input::new("token", "token")
+                            Input::new("password", "password")
                                 .with_id("for-token-input")
-                                                .with_attributes([("size", "50")]),
+                                .with_attributes([
-                                        ),
+                                    ("size", "50"),
-                                ),
+                                    ("class", "authentication-form__input"),
+                                ]),
+                        )
+                        .with_html(
+                            Button::new("Sign In")
+                                .with_attributes([("class", "authentication-form__button")]),
                         ),
                 ),
         )
@@ -49,14 +52,7 @@ pub fn gallery(handles: Vec<Result<FileHandle, ReadFileError>>) -> build_html::H
     let mut gallery = Container::new(ContainerType::Div).with_attributes([("class", "gallery")]);
     for handle in handles {
         let container = match handle {
-            Ok(ref handle) => thumbnail(&handle.id).with_html(
+            Ok(ref handle) => thumbnail(&handle.info),
-                Form::new()
-                    .with_path(&format!("/{}", *handle.id))
-                    .with_method("post")
-                    .with_html(Input::new("hidden", "_method").with_value("delete"))
-                    .with_html(Button::new("Delete")),
-            ),
-
             Err(err) => Container::new(ContainerType::Div)
                 .with_attributes(vec![("class", "file")])
                 .with_paragraph(format!("{:?}", err)),
@@ -88,15 +84,31 @@ pub fn upload_form() -> Form {
         )
 }
 
-pub fn thumbnail(id: &FileId) -> Container {
+pub fn thumbnail(info: &FileInfo) -> Container {
     Container::new(ContainerType::Div)
         .with_attributes(vec![("class", "card thumbnail")])
         .with_html(
             Container::new(ContainerType::Div).with_link(
-                format!("/{}", **id),
+                format!("/{}", *info.id),
-                Image::new(&format!("{}/tn", **id))
+                Container::default()
-                    .with_attributes([("class", "thumbnail__image")])
+                    .with_attributes([("class", "thumbnail")])
+                    .with_image(format!("{}/tn", *info.id), "test data")
                     .to_html_string(),
             ),
         )
+        .with_html(
+            Container::new(ContainerType::Div)
+                .with_html(
+                    Container::new(ContainerType::UnorderedList)
+                        .with_attributes(vec![("class", "thumbnail__metadata")])
+                        .with_html(info.name.clone())
+                        .with_html(format!("{}", info.created.format("%Y-%m-%d"))),
+                )
+                .with_html(
+                    Form::new()
+                        .with_path(&format!("/delete/{}", *info.id))
+                        .with_method("post")
+                        .with_html(Button::new("Delete")),
+                ),
+        )
 }

file-service/src/store/filehandle.rs

@@ -120,8 +120,13 @@ impl FileHandle {
     /// Create a new entry in the database
     pub fn new(filename: String, root: PathBuf) -> Result<Self, WriteFileError> {
         let id = FileId::from(Uuid::new_v4().hyphenated().to_string());
+        let path = PathBuf::from(filename);
 
-        let extension = PathBuf::from(filename)
+        let name = path
+            .file_stem()
+            .and_then(|s| s.to_str().map(|s| s.to_owned()))
+            .ok_or(WriteFileError::InvalidPath)?;
+        let extension = path
             .extension()
             .and_then(|s| s.to_str().map(|s| s.to_owned()))
             .ok_or(WriteFileError::InvalidPath)?;
@@ -138,6 +143,7 @@ impl FileHandle {
 
         let info = FileInfo {
             id: id.clone(),
+            name,
             size: 0,
             created: Utc::now(),
             file_type,
@@ -233,6 +239,17 @@ mod test {
         );
     }
 
+    #[test]
+    fn it_creates_file_info() {
+        let tmp = TempDir::new("var").unwrap();
+        let handle =
+            FileHandle::new("rawr.png".to_owned(), PathBuf::from(tmp.path())).expect("to succeed");
+        assert_eq!(handle.info.name, "rawr");
+        assert_eq!(handle.info.size, 0);
+        assert_eq!(handle.info.file_type, "image/png");
+        assert_eq!(handle.info.extension, "png");
+    }
+
     #[test]
     fn it_opens_a_file() {
         let tmp = TempDir::new("var").unwrap();

file-service/src/store/fileinfo.rs

@@ -11,6 +11,12 @@ use std::{
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct FileInfo {
     pub id: FileId,
+
+    // Early versions of the application didn't support a name field, so it is possible that
+    // metadata won't contain the name. We can just default to an empty string when loading the
+    // metadata, as all future versions will require a filename when the file gets uploaded.
+    #[serde(default)]
+    pub name: String,
     pub size: usize,
     pub created: DateTime<Utc>,
     pub file_type: String,
@@ -50,6 +56,7 @@ mod test {
 
         let info = FileInfo {
             id: FileId("temp-id".to_owned()),
+            name: "test-image".to_owned(),
             size: 23777,
             created,
             file_type: "image/png".to_owned(),

file-service/src/store/mod.rs

@@ -53,9 +53,6 @@ pub enum ReadFileError {
     #[error("permission denied")]
     PermissionDenied,
 
-    #[error("invalid path")]
-    InvalidPath,
-
     #[error("JSON error")]
     JSONError(#[from] serde_json::error::Error),
 
@@ -63,6 +60,36 @@ pub enum ReadFileError {
     IOError(#[from] std::io::Error),
 }
 
+#[derive(Debug, Error)]
+pub enum DeleteFileError {
+    #[error("file not found")]
+    FileNotFound(PathBuf),
+
+    #[error("metadata path is not a file")]
+    NotAFile,
+
+    #[error("cannot read metadata")]
+    PermissionDenied,
+
+    #[error("invalid metadata path")]
+    MetadataParseError(serde_json::error::Error),
+
+    #[error("IO error")]
+    IOError(#[from] std::io::Error),
+}
+
+impl From<ReadFileError> for DeleteFileError {
+    fn from(err: ReadFileError) -> Self {
+        match err {
+            ReadFileError::FileNotFound(path) => DeleteFileError::FileNotFound(path),
+            ReadFileError::NotAFile => DeleteFileError::NotAFile,
+            ReadFileError::PermissionDenied => DeleteFileError::PermissionDenied,
+            ReadFileError::JSONError(err) => DeleteFileError::MetadataParseError(err),
+            ReadFileError::IOError(err) => DeleteFileError::IOError(err),
+        }
+    }
+}
+
 #[derive(Debug, Error)]
 pub enum AuthError {
     #[error("authentication token is duplicated")]
@@ -369,7 +396,7 @@ impl Store {
         FileHandle::load(id, &self.files_root)
     }
 
-    pub fn delete_file(&mut self, id: &FileId) -> Result<(), WriteFileError> {
+    pub fn delete_file(&mut self, id: &FileId) -> Result<(), DeleteFileError> {
         let handle = FileHandle::load(id, &self.files_root)?;
         handle.delete();
         Ok(())

file-service/templates/style.css

@@ -29,6 +29,7 @@ body {
     justify-content: center;
     align-items: center;
     height: 200px;
+    margin: 8px;
 }
 
 .authentication-form {
@@ -77,6 +78,10 @@ body {
     border: none;
 }
 
+.thumbnail__metadata {
+    list-style: none;
+}
+
 /*
 [type="submit"] {
     border-radius: 1em;
@@ -129,6 +134,16 @@ body {
 
     .authentication-form {
         width: 100%;
+        display: flex;
+        flex-direction: column;
+    }
+
+    .authentication-form__input {
+        font-size: x-large;
+    }
+
+    .authentication-form__button {
+        font-size: x-large;
     }
 
     .upload-form__selector {

tree/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "tree"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

tree/src/lib.rs

@@ -0,0 +1,187 @@
+//! This data structure is a generic tree which can contain any data. That data itself need to keep
+//! track of its own tree structure.
+//!
+//! This surely already exists. I am created it to test my own ability to do things in Rust.
+
+use std::{
+    cell::{Ref, RefCell},
+    collections::VecDeque,
+    rc::Rc,
+};
+
+#[derive(Clone, Debug, Default)]
+pub enum Tree<T> {
+    #[default]
+    Empty,
+    Root(Node<T>),
+}
+
+impl<T> Tree<T> {
+    pub fn new(value: T) -> (Tree<T>, Node<T>) {
+        let node = Node::new(value);
+        let tree = Tree::Root(node.clone());
+        (tree, node)
+    }
+
+    pub fn set_value(&mut self, value: T) -> Node<T> {
+        let node = Node::new(value);
+        *self = Tree::Root(node.clone());
+        node
+    }
+
+    /// Use a breadth-first-search pattern to find a node, returning the node if found.
+    pub fn find_bfs<F>(&self, op: F) -> Option<Node<T>>
+    where
+        F: FnOnce(&T) -> bool + Copy,
+    {
+        let mut queue: VecDeque<Node<T>> = match self {
+            Tree::Empty => VecDeque::new(),
+            Tree::Root(node) => {
+                let mut queue = VecDeque::new();
+                queue.push_back(node.clone());
+                queue
+            }
+        };
+
+        while let Some(node) = queue.pop_front() {
+            if op(&node.value()) {
+                return Some(node.clone());
+            }
+
+            for child in node.children().iter() {
+                queue.push_back(child.clone())
+            }
+        }
+        None
+    }
+
+    /// Convert each node of a tree from type T to type U
+    pub fn map<F, U>(&self, op: F) -> Tree<U>
+    where
+        F: FnOnce(&T) -> U + Copy,
+    {
+        // A key part of this is to avoid recursion. There is no telling how deep a tree may go (Go
+        // game records can go hundreds of nodes deep), so we're going to just avoid recursion.
+        match self {
+            Tree::Empty => Tree::Empty,
+            Tree::Root(root) => {
+                let new_root = Node::new(op(&root.value()));
+
+                // This queue serves as a work list. Each node in the queue needs to be converted,
+                // and I've paired the node up with the one that it's supposed to be attached to.
+                // So, as we look at a node A, we make sure that all of its children gets added to
+                // the queue, and that the queue knows that the conversion of each child node
+                // should get attached to A.
+                let mut queue: VecDeque<(Node<T>, Node<U>)> = root
+                    .children()
+                    .iter()
+                    .map(|child| (child.clone(), new_root.clone()))
+                    .collect();
+
+                while let Some((source, dest)) = queue.pop_front() {
+                    let res = Node::new(op(&source.value()));
+                    dest.add_child_node(res.clone());
+
+                    for child in source.children().iter() {
+                        queue.push_back((child.clone(), res.clone()));
+                    }
+                }
+                Tree::Root(new_root)
+            }
+        }
+    }
+}
+
+// By using the Rc<RefCell> container here, I'm able to make Node easily clonable while still
+// having the contents be shared. This means that I can change the tree structure without having to
+// make the visible objects mutable.
+//
+// This feels like cheating the type system.
+//
+// However, since I've moved the RefCell inside of the node, I can borrow the node multiple times
+// in a traversal function and I can make changes to nodes that I find.
+#[derive(Debug)]
+pub struct Node<T>(Rc<RefCell<Node_<T>>>);
+
+impl<T> Clone for Node<T> {
+    fn clone(&self) -> Self {
+        Node(Rc::clone(&self.0))
+    }
+}
+
+#[derive(Debug)]
+struct Node_<T> {
+    value: T,
+    children: Vec<Node<T>>,
+}
+
+impl<T> Node<T> {
+    pub fn new(value: T) -> Self {
+        Self(Rc::new(RefCell::new(Node_ {
+            value,
+            children: vec![],
+        })))
+    }
+
+    /// Immutably retrieve the data in this node.
+    pub fn value(&self) -> Ref<T> {
+        // Ref::map is not actually a member function. I don't know why this was done, other than
+        // maybe to avoid conflicting with other `map` declarations. Why that is necessary when
+        // Option::map exists as a member, I don't know.
+        Ref::map(self.0.borrow(), |v| &v.value)
+    }
+
+    pub fn children(&self) -> Ref<Vec<Node<T>>> {
+        Ref::map(self.0.borrow(), |v| &v.children)
+    }
+
+    pub fn add_child_node(&self, child: Node<T>) {
+        self.0.borrow_mut().children.push(child)
+    }
+
+    pub fn add_child_value(&self, value: T) -> Node<T> {
+        let node = Node::new(value);
+        self.0.borrow_mut().children.push(node.clone());
+        node
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn can_find_node_in_tree() {
+        let mut tree = Tree::default();
+        tree.set_value(15);
+        assert!(tree.find_bfs(|val| *val == 15).is_some());
+        assert!(tree.find_bfs(|val| *val == 16).is_none());
+
+        let node = tree.find_bfs(|val| *val == 15).unwrap();
+        node.add_child_value(20);
+
+        assert!(tree.find_bfs(|val| *val == 20).is_some());
+    }
+
+    #[test]
+    fn node_can_add_children() {
+        let n = Node::new(15);
+        n.add_child_value(20);
+
+        assert_eq!(*n.value(), 15);
+        // assert_eq!(n.children(), vec![Rc::new(RefCell::new(Node::new(20)))]);
+    }
+
+    #[test]
+    fn it_can_map_one_tree_to_another() {
+        let (tree, n) = Tree::new(15);
+        let n = n.add_child_value(16);
+        let _ = n.add_child_value(17);
+
+        let tree2 = tree.map(|v| v.to_string());
+
+        assert!(tree2.find_bfs(|val| *val == "15").is_some());
+        assert!(tree2.find_bfs(|val| *val == "16").is_some());
+        assert!(tree2.find_bfs(|val| *val == "17").is_some());
+    }
+}