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[package]
name = "en"
version = "0.1.0"
description = "A non-linear writing instrument."
license = "AGPL-3.0-only"
repository = "https://codeberg.org/jutty/en"
edition = "2024"
rust-version= "1.91.1"
[dependencies]
axum = "0.8.7"
tokio = { version = "1.48.0", features = ["rt-multi-thread"] }
tera = { version = "1.20.1", features = ["builtins"] }
serde_json = "1.0.145"
serde = { version = "1.0.228", features = ["derive"] }
toml = "0.9.8"

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solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

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# en
en is a tool to write non-linear, connected pieces of text and have their references mapped out as a graph of connected information.
It works by ingesting a TOML file containing your node specification and serving it as a website that allows nodes to be browsed, searched and listed in relation to each other or as a shallow tree of nodes.

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use std::collections::HashMap;
use crate::types::*;
pub enum Format {
Toml,
Json
}
pub fn serialize_graph(out_format: Format, graph: &Graph) -> String {
match out_format {
Format::Toml => {
match toml::to_string(graph) {
Ok(s) => s,
Err(e) => e.to_string(),
}
},
Format::Json => {
match serde_json::to_string(graph) {
Ok(s) => s,
Err(e) => e.to_string(),
}
},
}
}
pub fn deserialize_graph(in_format: Format, serial: &String) -> Graph {
match in_format {
Format::Toml => { match toml::from_str(&serial) {
Ok(g) => g,
Err(error) => Graph::new(Some(error.to_string()))
}},
Format::Json => { match serde_json::from_str(&serial) {
Ok(g) => g,
Err(error) => Graph::new(Some(error.to_string()))
}}
}
}
pub fn populate_graph() -> Graph {
let toml_source = match std::fs::read_to_string("./static/graph.toml") {
Ok(s) => s,
Err(e) => format!("Error: {e}"),
};
let graph = deserialize_graph(Format::Toml, &toml_source);
let mut new_nodes: HashMap<String, Node> = HashMap::new();
let mut incoming: HashMap<String, Vec<Edge>> = HashMap::new();
// If an edge has no "from" ID, default to its node's ID
for (key, node) in graph.nodes.iter() {
let mut new_node = node.clone();
let connections = node.connections.clone().unwrap_or_default();
for (i, edge) in connections.iter().enumerate() {
if edge.from == "" {
let new_edge = Edge {
from: key.to_string(),
..edge.clone()
};
let mut vec = connections.clone();
vec[i] = new_edge;
new_node = Node {
connections: Some(vec),
..node.clone()
};
}
}
new_nodes.insert(key.to_string(), new_node.clone());
}
// Construct a HashMap with incoming connections (reversed edges)
for node in new_nodes.clone().into_values() {
let empty_vec: Vec<Edge> = vec![];
for edge in node.connections.clone().unwrap_or_default().iter() {
let vec = incoming.get(&edge.to.clone()).unwrap_or(&empty_vec);
if vec.contains(edge) {
vec.clone().extend_from_slice(&[edge.clone()]);
incoming.insert(edge.to.clone(), vec.clone());
} else {
incoming.insert(edge.to.clone(), vec![edge.clone()]);
}
}
}
Graph {
nodes: new_nodes,
incoming: incoming,
..graph
}
}

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use axum::{
extract::Path,
http::{header, StatusCode},
response::{ Html, IntoResponse, Redirect },
routing::get,
Form,
Router,
};
mod types;
mod formats;
use formats::*;
use types::*;
#[tokio::main]
async fn main() {
let app = Router::new()
.route("/", get(index).post(query))
.route("/graph/toml", get(toml_graph))
.route("/graph/json", get(json_graph))
.route("/static/style.css", get(stylesheet))
.route("/node/{node_id}", get(node_view).post(node_view))
.route("/tree", get(tree))
.fallback(not_found)
;
let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
axum::serve(listener, app).await.unwrap();
}
fn make_body(
name: &str,
context: tera::Context,
error_code: u16,
error_message: &str,
) -> String {
let tera = tera::Tera::new(
concat!(env!("CARGO_MANIFEST_DIR"), "/templates/**/*"),
).unwrap_or(tera::Tera::default());
let mut error_context = tera::Context::new();
let error = StatusCode::from_u16(error_code)
.unwrap_or(StatusCode::NOT_IMPLEMENTED);
error_context.insert("title", &error.to_string());
error_context.insert(
"message",
&format!("Error while filling template {}: {}", name, error_message),
);
tera.render(name, &context)
.unwrap_or(tera.render("error.html", &error_context)
.unwrap_or(error_message.to_string()))
}
fn template_handler(
name: &str,
context: tera::Context,
error_code: u16,
error_message: &str,
) -> Html<String> {
let body = make_body(name, context, error_code, error_message);
Html(body)
}
async fn node_view(Path(id): Path<String>) -> impl IntoResponse {
let mut context = tera::Context::new();
let graph = populate_graph();
let nodes = graph.nodes;
let empty_node = Node::new(
Some(format!("Could not find node with ID {}.", id)),
);
let node: &Node = nodes.get(&id).unwrap_or(&empty_node);
context.insert("id", &node.id);
context.insert("title", &node.title);
context.insert("body", &node.body);
context.insert("connections", &node.connections.clone());
context.insert("incoming", &graph.incoming.get(&node.id));
template_handler(
"node.html",
context,
500,
&format!(
r#"Failed to generate page for node {} (ID {}) with {} outgoing,
{} incoming connections and body "{}""#,
node.title,
node.id,
node.connections.iter().len(),
graph.incoming.get(&node.id).iter().len(),
node.body,
),
)
}
async fn index() -> Html<String> {
let mut context = tera::Context::new();
let graph = populate_graph();
let root_node = graph.get_root();
let nodes: Vec<Node> = graph.nodes.into_values().collect();
context.insert("nodes", &nodes);
context.insert("root_node", &root_node);
template_handler("index.html", context, 500, "Failed to render template.")
}
async fn tree() -> Html<String> {
let mut context = tera::Context::new();
let graph = populate_graph();
let root_node = graph.get_root();
let nodes: Vec<Node> = graph.nodes.into_values().collect();
context.insert("nodes", &nodes);
context.insert("root_node", &root_node);
template_handler("tree.html", context, 500, "Failed to render template")
}
#[derive(serde::Deserialize)]
struct Query { node: String }
async fn query(Form(query): Form<Query>) -> Redirect {
Redirect::permanent(format!("/node/{}", query.node).as_str())
}
async fn json_graph() -> impl IntoResponse {
let graph = populate_graph();
let body = serialize_graph(Format::Json, &graph);
([(header::CONTENT_TYPE, "application/json")], body)
}
async fn toml_graph() -> impl IntoResponse {
let graph = populate_graph();
let body = serialize_graph(Format::Toml, &graph);
([(header::CONTENT_TYPE, "text/plain")], body)
}
async fn stylesheet() -> impl IntoResponse {
let body = match std::fs::read_to_string("./static/style.css") {
Ok(s) => s,
Err(e) => format!("Error: {e}"),
};
([(header::CONTENT_TYPE, "text/css")], body)
}
fn make_error_body(
code: Option<u16>,
message: Option<&str>,
) -> String {
let mut context = tera::Context::new();
let code = code.unwrap_or(501);
let message = &message.unwrap_or("Unknown error");
context.insert("title", &StatusCode::from_u16(code)
.unwrap_or(StatusCode::INTERNAL_SERVER_ERROR).to_string());
context.insert("message", message);
context.insert("status_code", &code.to_string());
make_body("error.html", context, 500, &format!(
"Failed to render template for Error {}: {}",
code,
message,
))
}
fn make_error_response(
code: Option<u16>,
message: Option<&str>,
) -> impl IntoResponse {
let code = code.unwrap_or(501);
let message = &message.unwrap_or("Unknown error");
let body = make_error_body(Some(code), Some(message));
(
StatusCode::from_u16(code).unwrap_or(StatusCode::INTERNAL_SERVER_ERROR),
[(header::CONTENT_TYPE, "text/html")],
body.to_string(),
)
}
async fn not_found() -> impl IntoResponse {
make_error_response(
Some(404),
Some("The page you tried to access could not be found."),
)
}

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use serde::{Serialize, Deserialize};
use std::collections::HashMap;
#[derive(Serialize, Deserialize, Clone, Default)]
pub struct Graph {
pub messages: Vec<String>,
pub root_node: String,
pub nodes: HashMap<String, Node>,
#[serde(skip)]
pub incoming: HashMap<String, Vec<Edge>>,
}
#[derive(Serialize, Clone, Default, PartialEq, Deserialize)]
pub struct Edge {
#[serde(default)]
pub anchor: String,
#[serde(default)]
pub from: String,
pub to: String,
}
#[derive(Serialize, Deserialize, Clone, Default)]
pub struct Node {
pub title: String,
pub id: String,
pub body: String,
#[serde(skip_serializing_if = "Option::is_none")]
pub connections: Option<Vec<Edge>>,
}
impl Graph {
pub fn new(message: Option<String>) -> Graph {
Self {
nodes: HashMap::new(),
incoming: HashMap::new(),
root_node: "".to_string(),
messages: vec![message
.unwrap_or("This graph is empty or in error".to_string())],
}
}
pub fn get_root(&self) -> Option<Node> {
match self.nodes.get(&self.root_node) {
Some(n) => Some(n.clone()),
None => None,
}
}
}
impl Node {
pub fn new(message: Option<String>) -> Node {
Self {
title: "Empty Node".to_string(),
id: "EmptyNode".to_string(),
body: match message {
Some(s) => s,
None => "Node is empty, missing or wasn't found.".to_string()
},
connections: None,
}
}
}

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messages = [ "Test Graph over Fetch from Actix" ]
root_node = "Interface"
[nodes.SomeNode]
title = "Some Node"
id = "SomeNode"
body = "This describes some node in relation to some other node."
[[nodes.SomeNode.connections]]
anchor = "some other node"
to = "SomeOtherNode"
[nodes.SomeOtherNode]
title = "Some Other Node"
id = "SomeOtherNode"
body = "This describes some other node in relation to the first node."
[[nodes.SomeOtherNode.connections]]
anchor = "the first node"
to = "SomeNode"
[nodes.Interface]
title = "Interface"
id = "Interface"
body = """
An interface is a point of contact between the inside and the outside of something. Contrast with intraface.
"""
[[nodes.Interface.connections]]
to = "Intraface"
[nodes.Intraface]
title = "Intraface"
id = "Intraface"
body = """
The intraface is the reflexive process of communicating, creating, thinking, that does not or cannot get shared with others. Contrast with interface.
"""
[[nodes.Intraface.connections]]
to = "Interface"
[[nodes.Intraface.connections]]
to = "Thinking"
[nodes.Thinking]
title = "Thinking"
id = "Thinking"
body = """
Thinking is a process by which some beings create and manipulate mental constructs.
"""
[nodes.Paradigm]
title = "Paradigm"
id = "Paradigm"
body = """
A paradigm is a cohesive set of beliefs, methods and principles that serve both as justification for a given position and as guidance for how to pursue its praxis.
"""
[[nodes.Paradigm.connections]]
to = "Belief"
[[nodes.Paradigm.connections]]
to = "Method"
[[nodes.Paradigm.connections]]
to = "Principle"
[[nodes.Paradigm.connections]]
to = "Position"
[[nodes.Paradigm.connections]]
to = "Praxis"

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* {
line-height: 1.6em;
}
html {
height: 100%;
}
body {
height: 100%;
display: grid;
grid-template-rows: auto 1fr auto;
}
footer div {
margin: 20px 0;
text-align: center;
font-size: 0.8em;
}
@media (prefers-color-scheme: dark) {
* {
background-color: #222222;
color: #f1e9e5;
}
}

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<!DOCTYPE html>
<html>
<head>
<title>{% block title %}{% endblock title %} &bullet; en</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" >
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="/static/style.css" rel="stylesheet">
{% block head %}
{% endblock head %}
</head>
<body>
<nav style="text-align: center;">
<ul style="display: inline; padding-left: 0;">
<li style="display: inline;"><a href="/">Index</a></li>
<li style="display: inline;"><a href="/about">About</a></li>
<li style="display: inline;"><a href="/tree">Tree</a></li>
<li style="display: inline;"><a href="/graph/toml">TOML Graph</a></li>
<li style="display: inline;"><a href="/graph/json">JSON Graph</a></li>
</ul>
<hr>
</nav>
<main>
{% block body %}
{% endblock body %}
</main>
<footer>
<hr>
<div>
<cite>made by <a href="https://jutty.dev">jutty</a></cite>
&bullet;
<a href="/acknowledgments">acknowledgments</a>
&bullet;
<a href="https://codeberg.org/jutty/en">source code</a>
<br/>
built
<time>
{{ now(utc=true) | date(format="%Y-%m-%d %H:%M") }} UTC
</time>
&bullet;
<time>{{ now(timestamp=true) }} Unix Epoch</time>
</div>
</footer>
</body>
</html>

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<p>There are no nodes. The graph is either empty or failed to parse.</p>
<p>Check the <a href="/graph/toml">raw endpoints</a> for possible parsing errors.</p>

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{% extends "base.html" %}
{%- block body %}
<h1>
{{ title | default(value="Unknown error") }}
</h1>
{{ message | default(value="This error has not been described in detail.") }}
<hr>
<div align=right style="margin-top: 4em; margin-right: 2em">
<p><em>It seems you have fallen out of the circle.</em></p>
<p>Maybe you'd like to climb back on the <a href="/tree">tree</a>?
</div>
</p>
{%- endblock body %}

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{% extends "base.html" %}
{% block title %}Index{% endblock title %}
{%- block body %}
<h1>en</h1>
<p>
<em>A non-linear writing instrument.</em>
{% if nodes %}
<form method="post">
<label for="node">Find by ID:</label>
<input type="text" name="node" required/>
<input type="submit" value="Submit"/>
</form>
<hr>
<h2>Nodes</h2>
<nav>
{% if root_node %}
<p>
<strong>Root</strong>:
<a href="/node/{{root_node.id}}">{{root_node.title}}</a>
</p>
{% endif %}
{% if nodes %}
<ul>
{% for node in nodes %}
{% if node.id != root_node.id %}
<li><a href="/node/{{node.id}}">{{node.title}}</a></li>
{% endif %}
{% endfor %}
{% endif %}
</ul>
</nav>
{% else %}
<hr>
{% include "empty.html" %}
{% endif %}
{%- endblock body %}

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{% extends "base.html" %}
{% block title %}{{ title }}{% endblock title %}
{%- block body %}
<section>
<h1>{{ title }}</h1>
<code style="display: inline;">ID: {{ id }}</code>
<p>{{ body }}</p>
</section>
{% if connections or incoming %}
<aside>
<hr>
<h2>Connections</h2>
{% if connections %}
<ul>
{% for connection in connections %}
<li>
<strong>{{id}}</strong>
&#x1f86a;
<a href="/node/{{connection.to}}">{{connection.to}}</a>
</li>
{% endfor %}
</ul>
{% else %}
<em>No outgoing connections.</em>
{% endif %}
{% if incoming %}
<h3>Incoming connections</h3>
<ul>
{% for connection in incoming %}
<li>
<strong>{{connection.to}}</strong>
&#x1F868;
<a href="/node/{{connection.from}}">{{connection.from}}</a>
</li>
{% endfor %}
</ul>
{% endif %}
</aside>
{% else %}
<em>Node has no connections.</em>
{% endif %}
{%- endblock body %}

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{% extends "base.html" %}
{% block title %}Tree{% endblock title %}
{%- block body %}
{% if nodes or root_node %}
<h1>Tree</h1>
<p><strong>Total nodes:</strong> {{ nodes | length }}</p>
{% if root_node %}
<h2>Root node</h2>
<ul>
<li>
<a href="/node/{{root_node.id}}">{{root_node.title}}</a>
<ul>
<li><strong>Body:</strong>
<ul style="display: inline; padding-left: 0;">
<li style="display: inline;">
<details style="display: inline; cursor: pointer;">
<summary style="display: inline;">
{{root_node.body | truncate(length=120)}}
</summary>
{{root_node.body}}
</details>
</li>
</ul>
{% if root_node.connections %}
<li><strong>Connections</strong>
<ul>
{% for connection in root_node.connections %}
<li><a href="/node/{{connection.to}}">{{connection.to}}</a></li>
{% endfor %}
</ul>
</li>
{% endif %}
</ul>
</li>
</ul>
{% endif %}
{% if nodes %}
<h2>All nodes</h2>
<ul>
{% for node in nodes %}
<li>
<a href="/node/{{node.id}}">{{node.title}}</a>
<ul>
<li><strong>Body:</strong>
<ul style="display: inline; padding-left: 0;">
<li style="display: inline;">
<details style="display: inline; cursor: pointer;">
<summary style="display: inline;">
{{node.body | truncate(length=30)}}
</summary>
{{node.body}}
</details>
</li>
</ul>
{% if node.connections %}
<li><strong>Connections</strong>
<ul>
{% for connection in node.connections %}
<li><a href="/node/{{connection.to}}">{{connection.to}}</a></li>
{% endfor %}
</ul>
</li>
{% endif %}
</ul>
</li>
{% endfor %}
{% endif %}
</ul>
{% else %}
<p>There are no nodes. The graph is either empty or failed to parse.</p>
{% endif %}
{%- endblock body %}