cli parser

src/main.rs

@@ -1,16 +1,9 @@
-/*
-#[cfg(test)]
-#![feature(test)]
-extern crate test;
-*/
-
 extern crate serde;
 #[macro_use]
 extern crate serde_derive;
 // This allows inserting JSON documents
 #[macro_use]
 extern crate serde_json;
-#[macro_use]
 extern crate ledb;
 // This allows define typed documents easy
 #[macro_use]
@@ -18,6 +11,7 @@ extern crate ledb_derive;
 extern crate ledb_types;
 extern crate zip;
 
+use clap::{Parser, Subcommand};
 use rand::seq::IteratorRandom;
 use std::time::Instant;
 
@@ -25,6 +19,32 @@ use std::{fs, io};
 
 use ledb::{Options, Storage};
 
+#[derive(Subcommand, Debug)]
+enum Command {
+    Write,
+    Compact,
+    Print {
+        #[clap(value_parser, default_value = "0")]
+        id: u32,
+    },
+    ZipPrint {
+        #[clap(value_parser, default_value = "0")]
+        file_num: usize,
+        #[clap(value_parser, default_value = "0")]
+        num: usize,
+    },
+}
+
+#[derive(Parser, Debug)]
+#[clap(author, version, about, long_about = None)]
+#[clap(propagate_version = true)]
+struct Cli {
+    #[clap(subcommand)]
+    command: Command,
+    #[clap(short, long, action)]
+    measure: bool,
+}
+
 #[derive(Debug, Default, Clone, Deserialize)]
 struct SourceQuestion {
     #[serde(default)]
@@ -289,12 +309,8 @@ fn writer_v4() {
 
     let storage = Storage::new("db", options).unwrap();
     let collection = storage.collection("questions").unwrap();
+    collection.purge().unwrap();
 
-    query!(index for collection
-        num int,
-        batch_info.filename str,
-    )
-    .unwrap();
     let mut count: usize = 0;
     let count = &mut count;
     (0..archive.len())
@@ -335,23 +351,32 @@ fn writer_v4() {
     drop(storage);
 }
 
-fn print_question(q: Question) {
-    println!("{:?}", q)
+fn print_question_from<F>(get_q: F)
+where
+    F: FnOnce() -> Option<Question>,
+{
+    let q = get_q().unwrap();
+    println!("{:#?}", q)
 }
 
-fn reader_v1() -> Option<Question> {
+fn reader_v1(mut file_num: usize, mut num: usize) -> Option<Question> {
     let zip_file = fs::File::open("test1.zip").unwrap();
     let zip_reader = io::BufReader::new(zip_file);
     let mut archive = zip::ZipArchive::new(zip_reader).unwrap();
 
     let mut rng = rand::thread_rng();
-    let file_n = (0..archive.len()).choose(&mut rng).unwrap();
-    let file = archive.by_index(file_n).unwrap();
+    if file_num == 0 {
+        file_num = (1..=archive.len()).choose(&mut rng).unwrap();
+    }
+    let file = archive.by_index(file_num - 1).unwrap();
     let data: Result<SourceQuestionsBatch, _> = serde_json::from_reader(file);
     let data = data.unwrap();
     let questions: Vec<Question> = data.into();
 
-    questions.into_iter().choose(&mut rng)
+    if num == 0 {
+        num = (1..=questions.len()).choose(&mut rng).unwrap();
+    }
+    Some(questions[num - 1].clone())
 }
 
 fn compact_db() {
@@ -361,6 +386,7 @@ fn compact_db() {
         "no_lock": true,
         "no_meta_sync": true,
         "no_sync": true,
+        "compact": true,
     }))
     .unwrap();
 
@@ -372,7 +398,7 @@ fn compact_db() {
     drop(storage);
 }
 
-fn reader_v4() -> Option<Question> {
+fn reader_v4(mut id: u32) -> Option<Question> {
     let options: Options = serde_json::from_value(json!({
             "read_only": true,
     //        "map_async": true,
@@ -386,23 +412,37 @@ fn reader_v4() -> Option<Question> {
     let storage = Storage::new("db", options).unwrap();
     let collection = storage.collection("questions").unwrap();
     let mut rng = rand::thread_rng();
+
+    if id == 0 {
         let last_id = collection.last_id().unwrap();
-    let id = (1..(last_id + 1)).choose(&mut rng).unwrap();
+        id = (1..=last_id).choose(&mut rng).unwrap();
         //let id = ledb::KeyData::Int(id as i64);
+    }
 
     collection.get::<Question>(id).unwrap()
 }
 
 fn main() {
-    //println!("-- v1: ");
-    //measure_and_print(|| print_question(reader_v1().unwrap()));
-    //println!(" --- ");
-    //println!("-- v4: ");
-    //measure_and_print(|| print_question(reader_v4().unwrap()));
-    //println!(" --- ");
-    measure_and_print(writer_v4);
-    //measure_and_print(compact_db);
-    //measure_and_print(|| print_question(reader_v4().unwrap()));
+    let args = Cli::parse();
+
+    let mut action: Box<dyn FnOnce()> = match &args.command {
+        Command::Write => Box::new(writer_v4),
+        Command::Compact => Box::new(compact_db),
+        Command::Print { id } => {
+            let get_question = Box::new(|| reader_v4(*id));
+            Box::new(|| print_question_from(get_question))
+        }
+        Command::ZipPrint { file_num, num } => {
+            let get_question = Box::new(|| reader_v1(*file_num, *num));
+            Box::new(|| print_question_from(get_question))
+        }
+    };
+
+    if args.measure {
+        action = Box::new(|| measure_and_print(action));
+    }
+
+    action();
 }
 
 /*