new db

.gitignore

@@ -1,4 +1,4 @@
 /target
 **/*.rs.bk
-
-/db
+db.dat
+/db

Cargo.lock

@@ -1279,7 +1279,6 @@ name = "qchgk_web"
 version = "0.1.1"
 dependencies = [
  "chgk_ledb_lib",
- "ledb",
  "rand",
  "rocket",
  "rocket_contrib",

Cargo.toml

@@ -13,12 +13,9 @@ readme = "README.md"
 rand="0.8"
 serde="1.0"
 serde_json="1.0"
-ledb = {git = "https://github.com/b4tman/ledb.git", rev="a646b90e", package="ledb"}
 rocket="0.4"
 chgk_ledb_lib = {git = "https://gitea.b4tman.ru/b4tman/chgk_ledb.git", rev="e521e39f5e", package="chgk_ledb_lib"}
 
-# lmdb-zero="0.4"
-
 [dependencies.rocket_contrib]
 version = "0.4"
 default-features = false

src/main.rs

@@ -1,6 +1,5 @@
 #![feature(proc_macro_hygiene, decl_macro)]
 
-extern crate ledb;
 extern crate serde;
 extern crate serde_json;
 
@@ -16,10 +15,11 @@ use rocket_contrib::templates::Template;
 use rand::distributions::Uniform;
 use rand::Rng;
 
-use ledb::{Options, Storage};
-
+use chgk_ledb_lib::db;
 use chgk_ledb_lib::questions::Question;
 
+const DB_FILENAME: &str = "db.dat";
+
 trait ErrorEmpty {
     type Output;
     fn err_empty(self) -> Result<Self::Output, ()>;
@@ -32,36 +32,31 @@ impl<T, E> ErrorEmpty for Result<T, E> {
     }
 }
 
-struct AppState {
-    storage: Storage,
-    database_distribution: Uniform<u32>,
+struct AppState{
+    database_distribution: Uniform<usize>,
 }
 
-fn get_database_distribution(storage: &Storage) -> Uniform<u32> {
-    let collection = storage
-        .collection("questions")
-        .expect("collection \"questions\"");
-    let last_id = collection.last_id().expect("\"questions\" last_id");
-
-    rand::distributions::Uniform::new_inclusive(1u32, last_id)
+fn open_db() -> db::Reader<Question> {
+    db::Reader::new(DB_FILENAME, 2048).expect("new db reader")
 }
 
-fn random_question_id(database_distribution: &Uniform<u32>) -> u32 {
+fn get_database_distribution() -> Uniform<usize> {
+    let last_id = open_db().len();
+
+    rand::distributions::Uniform::new_inclusive(1usize, last_id)
+}
+
+fn random_question_id(database_distribution: &Uniform<usize>) -> usize {
     let mut rng = rand::thread_rng();
     rng.sample(database_distribution)
 }
 
-fn get_question(storage: &Storage, id: u32) -> Result<Question, ()> {
-    storage
-        .collection("questions")
-        .err_empty()?
-        .get::<Question>(id)
-        .err_empty()?
-        .ok_or(())
+fn get_question(id: usize) -> Result<Question, ()> {
+    open_db().get(id - 1).err_empty()
 }
 
-fn show_question_details(template_name: &'static str, data: &AppState, id: u32) -> Template {
-    match get_question(&data.storage, id) {
+fn show_question_details(template_name: &'static str, data: &AppState, id: usize) -> Template {
+    match get_question(id) {
         Ok(question) => {
             let mut context = serde_json::to_value(question).expect("question serialize");
             if context.is_object() {
@@ -79,12 +74,12 @@ fn show_question_details(template_name: &'static str, data: &AppState, id: u32)
 }
 
 #[get("/q/<id>")]
-fn show_question(data: State<AppState>, id: u32) -> Template {
+fn show_question(data: State<AppState>, id: usize) -> Template {
     show_question_details("question", data.inner(), id)
 }
 
 #[get("/q/<id>/a")]
-fn show_answer(data: State<AppState>, id: u32) -> Template {
+fn show_answer(data: State<AppState>, id: usize) -> Template {
     show_question_details("answer", data.inner(), id)
 }
 
@@ -112,19 +107,9 @@ fn not_found(_req: &rocket::Request) -> Template {
 }
 
 fn rocket() -> Rocket {
-    let options: Options = serde_json::from_value(serde_json::json!({
-    "read_only": true,
-    "no_lock": true,
-    }))
-    .unwrap();
-
-    let mut state = AppState {
-        storage: Storage::new("db", options).expect("open db"),
-        database_distribution: Uniform::new(1, 3),
+    let state = AppState {
+        database_distribution: get_database_distribution(),
     };
-    state.database_distribution = get_database_distribution(&state.storage);
-
-    let state = state;
 
     rocket::ignite()
         .manage(state)