From refactor

src/main.rs

@@ -13,12 +13,21 @@ extern crate zip;
 
 use clap::{Parser, Subcommand};
 use rand::seq::IteratorRandom;
+use std::path::PathBuf;
 use std::time::Instant;
-
 use std::{fs, io};
 
 use ledb::{Options, Storage};
 
+macro_rules! make {
+    ($Target:ident; by {$($field:ident),+}; from $src:expr) => {$Target {$(
+        $field: $src.$field
+    ),+}};
+    ($Target:ident; with defaults and by {$($field:ident),+}; from $src:expr) => {$Target {$(
+        $field: $src.$field
+    ),+ ,..$Target::default()}}
+}
+
 #[derive(Subcommand, Debug)]
 enum Command {
     Write,
@@ -45,7 +54,7 @@ struct Cli {
     measure: bool,
 }
 
-#[derive(Debug, Default, Clone, Deserialize)]
+#[derive(Debug, Default, Clone, Serialize, Deserialize)]
 struct SourceQuestion {
     #[serde(default)]
     num: u32,
@@ -100,7 +109,7 @@ struct SourceQuestion {
     rating: String,
 }
 
-#[derive(Debug, Default, Clone, Deserialize)]
+#[derive(Debug, Default, Clone, Serialize, Deserialize)]
 struct SourceQuestionsBatch {
     #[serde(default)]
     filename: String,
@@ -223,56 +232,32 @@ struct Question {
 
 impl From<SourceQuestion> for Question {
     fn from(src: SourceQuestion) -> Self {
-        Self {
-            num: src.num,
-            id: src.id,
-            description: src.description,
-            answer: src.answer,
-            author: src.author,
-            comment: src.comment,
-            comment1: src.comment1,
-            tour: src.tour,
-            url: src.url,
-            date: src.date,
-            processed_by: src.processed_by,
-            redacted_by: src.redacted_by,
-            copyright: src.copyright,
-            theme: src.theme,
-            kind: src.kind,
-            source: src.source,
-            rating: src.rating,
-            batch_info: BatchInfo::default(),
-        }
+        make! {Self; with defaults and by {
+            num, id, description, answer, author, comment, comment1, tour, url,
+            date, processed_by, redacted_by, copyright, theme, kind, source, rating
+        }; from src}
     }
 }
 
-impl From<&SourceQuestionsBatch> for BatchInfo {
-    fn from(src: &SourceQuestionsBatch) -> Self {
-        Self {
-            filename: src.filename.clone(),
-            description: src.description.clone(),
-            author: src.author.clone(),
-            comment: src.comment.clone(),
-            url: src.url.clone(),
-            date: src.date.clone(),
-            processed_by: src.processed_by.clone(),
-            redacted_by: src.redacted_by.clone(),
-            copyright: src.copyright.clone(),
-            theme: src.theme.clone(),
-            kind: src.kind.clone(),
-            source: src.source.clone(),
-            rating: src.rating.clone(),
-        }
+impl From<SourceQuestionsBatch> for BatchInfo {
+    fn from(src: SourceQuestionsBatch) -> Self {
+        make! {Self; by {
+            filename, description, author, comment, url, date,
+            processed_by, redacted_by, copyright, theme, kind, source, rating
+        }; from src}
     }
 }
 
 impl From<SourceQuestionsBatch> for Vec<Question> {
     fn from(src: SourceQuestionsBatch) -> Self {
-        let mut result = Vec::<Question>::with_capacity(src.questions.len());
-        src.questions.iter().for_each(|item| {
-            let mut question: Question = item.clone().into();
-            question.batch_info = BatchInfo::from(&src);
-            result.push(question);
+        let mut result: Vec<Question> = src
+            .questions
+            .iter()
+            .map(|item| item.clone().into())
+            .collect();
+        let batch_info = BatchInfo::from(src);
+        result.iter_mut().for_each(|mut question| {
+            question.batch_info = batch_info.clone();
         });
 
         result
@@ -293,7 +278,19 @@ pub fn measure_and_print<F: FnOnce()>(func: F) {
 }
 
 fn writer_v4() {
-    let zip_file = fs::File::open("test1.zip").unwrap();
+    const IN_FILENAME: &str = "test1.zip";
+    const OUT_DIR: &str = "db";
+
+    let out_file: PathBuf = [OUT_DIR, "data.mdb"].into_iter().collect();
+    match fs::metadata(&out_file) {
+        Ok(x) if x.is_file() => {
+            fs::remove_file(&out_file).unwrap();
+            println!(r#""{}" removed"#, out_file.to_str().unwrap());
+        }
+        _ => {}
+    };
+
+    let zip_file = fs::File::open(IN_FILENAME).unwrap();
     let zip_reader = io::BufReader::new(zip_file);
     let mut archive = zip::ZipArchive::new(zip_reader).unwrap();
 
@@ -309,7 +306,8 @@ fn writer_v4() {
 
     let storage = Storage::new("db", options).unwrap();
     let collection = storage.collection("questions").unwrap();
-    collection.purge().unwrap();
+
+    println!("converting...");
 
     let mut count: usize = 0;
     let count = &mut count;
@@ -333,17 +331,14 @@ fn writer_v4() {
         .for_each(|question| {
             let result = collection.insert(&question);
             if result.is_err() {
-                println!(
-                    "Error: {:?} \n\
-                     On: {:?}",
-                    result, question
-                );
+                println!("-- {:#?}", question);
+                panic!("-- {:#?}", result);
             } else {
                 *count += 1;
             }
         });
 
-    println!("inserted {}", count);
+    println!("inserted {}\nwriting...", count);
     storage.sync(true).unwrap();
     print!("stats: ");
     let stats = storage.stat().unwrap();