first experiments with rocket

2019-12-29 15:00:59 +01:00
commit a1b8f5a1a1
9 changed files with 1436 additions and 0 deletions
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+/target
+**/*.rs.bk
+.idea/
+inventory.json
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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="NodePackageJsonFileManager">
+    <packageJsonPaths />
+  </component>
+</project>
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+# Default ignored files
+/workspace.xml
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+[package]
+name = "rocket-inv"
+version = "0.1.0"
+authors = ["Ondřej Hruška <ondra@ondrovo.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rocket-download-response = "0.4.9"
+#rocket-include-tera = "0.4.5"
+
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+json_dotpath = "0.1.2"
+
+parking_lot = "0.10.0"
+
+[dependencies.rocket]
+version = "0.4.2"
+default-features = false
+
+[dependencies.rocket_contrib]
+version = "0.4.2"
+default-features = false
+features = ["json", "serve", "tera_templates"]
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+[global]
+port = 8123
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+#![feature(proc_macro_hygiene, decl_macro)]
+
+#[macro_use] extern crate rocket;
+#[macro_use] extern crate serde;
+
+//use rocket::request::FromSegments;
+//use rocket::http::uri::Segments;
+//use rocket_contrib::serve::StaticFiles;
+use rocket_contrib::templates::Template;
+
+mod store;
+use crate::store::Store;
+use rocket::State;
+use parking_lot::RwLock;
+use rocket::response::Redirect;
+use rocket::http::Status;
+use rocket::request::Form;
+use std::collections::HashMap;
+
+#[get("/")]
+fn index(store : State<RwLock<Store>>) -> Template {
+    let mut context = HashMap::new();
+    let rg = store.read();
+    context.insert("records", &rg.parts);
+    Template::render("index", context)
+}
+
+#[post("/add", data="<record>")]
+fn add_part(store : State<RwLock<Store>>, record : Form<store::Part>) -> Redirect {
+    store.write().add(record.into_inner());
+    Redirect::to(uri!(index))
+}
+
+fn main() {
+    rocket::ignite()
+        .attach(Template::fairing())
+        .manage(RwLock::new(Store::new()))
+        .mount("/", routes![index, add_part]).launch();
+}
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+use std::fs::{File, OpenOptions};
+use std::io::{Read, Write, Error};
+use std::path::Path;
+use rocket::request::FromForm;
+
+#[derive(Serialize,Deserialize)]
+pub struct Store {
+    pub parts : Vec<Part>
+}
+
+#[derive(Serialize,Deserialize,FromForm)]
+pub struct Part {
+    name : String,
+    quantity : usize,
+    location : String,
+}
+
+fn load_file_or(file : impl AsRef<Path>, def : String) -> String {
+    let mut file = match File::open(file) {
+        Ok(file) => file,
+        Err(_) => return def
+    };
+
+    let mut buf = String::new();
+    if file.read_to_string(&mut buf).is_err() {
+        return def;
+    }
+
+    buf
+}
+
+impl Store {
+    pub fn new() -> Self {
+        let mut file = load_file_or("inventory.json", "[]".to_string());
+
+        Store {
+            parts: serde_json::from_str(&file).unwrap(),
+        }
+    }
+
+    pub fn add(&mut self, part : Part) {
+        self.parts.push(part);
+
+        self.persist()
+    }
+
+    pub fn persist(&self) {
+        let mut file = OpenOptions::new().write(true).create(true).truncate(true).open("inventory.json").unwrap();
+
+        file.write(serde_json::to_string(&self.parts).unwrap().as_bytes()).unwrap();
+    }
+}
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+<!DOCTYPE html>
+
+<form action="/add" method="POST">
+	Name: <input type="text" name="name"><br>
+	Qty: <input type="number" step="1" min="0" name="quantity"><br>
+	Location: <input type="text" name="location"><br>
+	<button type="submit">Add</button>
+</form>
+
+<ul>
+{% for record in records %}
+	<li>
+		{{ record.name }} x {{ record.quantity }} in {{ record.location }}
+	</li>
+{% endfor %}
+</ul>