From 6150eba66beb96d03a3e2af839737e3ef4c0a086 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Fri, 15 Mar 2024 16:19:21 +0100
Subject: generation is POST and we have a <form> now

---
 src/format.rs    | 40 +++++++++++++++++++++++++++-
 src/server.rs    | 79 ++++++++++++++++++++++++++++++++++++++++++--------------
 static/style.css |  4 +++
 3 files changed, 102 insertions(+), 21 deletions(-)

diff --git a/src/format.rs b/src/format.rs
index 801611d..b9da487 100644
--- a/src/format.rs
+++ b/src/format.rs
@@ -156,7 +156,22 @@ pub fn format_batch_to<'a>(
         buf,
         r#"<p><strong>Extra examples (reading practice)</strong></p>"#
     )?;
-    // TODO
+    writeln!(
+        buf,
+        r#"<form method="POST" action="gen.html">
+        <p>practice levels<p>
+        <p><select name="first_level" value="0">
+        "#
+    )?;
+    for val in 0..=i {
+        write!(buf, r#"<option value="{}">{:03}</option>"#, val, val)?;
+    }
+    writeln!(
+        buf,
+        r#"</select> - <input type="hidden" name="last_level" value="{}" />{:03}</p>
+        <p><input type="submit" value="practice random sentences" /></p></form>"#,
+        i, i
+    )?;
 
     writeln!(buf, "<hr />")?;
     writeln!(buf, "<p>＼(≧▽≦)／</p>")?;
@@ -266,6 +281,29 @@ pub fn format_index_to(
 
     writeln!(buf, "<hr />")?;
 
+    writeln!(buf, r#"<p><strong>Extra reading practice</strong></p>"#)?;
+    writeln!(
+        buf,
+        r#"<form method="POST" action="gen.html">
+        <p>practice levels<p>
+        <p><select name="first_level" value="0">
+        "#
+    )?;
+    for val in 0..batches.len() {
+        write!(buf, r#"<option value="{}">{:03}</option>"#, val, val)?;
+    }
+    writeln!(buf, r#"</select> - <select name="last_level" value="0">"#)?;
+    for val in 0..batches.len() {
+        write!(buf, r#"<option value="{}">{:03}</option>"#, val, val)?;
+    }
+    writeln!(
+        buf,
+        r#"</select></p>
+        <p><input type="submit" value="practice random sentences" /></p></form>"#
+    )?;
+
+    writeln!(buf, "<hr />")?;
+
     let all_chars = Charset::from_iter(
         batches
             .iter()
diff --git a/src/server.rs b/src/server.rs
index c90ee40..774cff4 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -1,16 +1,16 @@
 use std::fs;
-use std::io::Write;
 
-use futures::stream::TryStreamExt;
 use anyhow::{anyhow, Result};
+use futures::stream::TryStreamExt;
 use rand::prelude::*;
+use serde::Deserialize;
 
 use http_types::mime;
 use tide::Request;
 
 use crate::datafiles::*;
-use crate::format::*;
 use crate::example::*;
+use crate::format::*;
 use crate::*;
 
 pub async fn server_main() -> tide::Result<()> {
@@ -85,7 +85,7 @@ pub async fn server_main() -> tide::Result<()> {
     app.at("/script.js").serve_file("static/script.js")?;
     app.at("/jquery.js").serve_file("static/jquery.js")?;
     app.at("/about.html").get(about_page);
-    app.at("/ex/:start/:end").get(gen_examples_page);
+    app.at("/gen.html").post(gen_examples_page);
     app.at("/:batch").get(batch_page);
 
     // ---- serve actual http ----
@@ -152,9 +152,16 @@ async fn batch_page(req: Request<State>) -> tide::Result {
         .build())
 }
 
-async fn gen_examples_page(req: Request<State>) -> tide::Result {
-    let first_level: usize = req.param("start")?.parse()?;
-    let last_level: usize = req.param("end")?.parse()?;
+#[derive(Deserialize)]
+struct GenParam {
+    first_level: usize,
+    last_level: usize,
+}
+
+async fn gen_examples_page(mut req: Request<State>) -> tide::Result {
+    let param: GenParam = req.body_form().await?;
+    let first_level = std::cmp::min(param.first_level, param.last_level);
+    let last_level = std::cmp::max(param.first_level, param.last_level);
 
     let allowed_chars = Charset::from_iter(
         req.state()
@@ -179,15 +186,16 @@ async fn gen_examples_page(req: Request<State>) -> tide::Result {
 
     let state: State = req.state();
     std::thread::spawn(move || {
-        tx.send_blocking(Ok(format!(r#"
+        tx.send_blocking(Ok(format!(
+            r#"
         <!DOCTYPE html>
         <html>
             <head>
                 <meta charset=\"UTF-8\" />
                 <title>{:03} - {:03} practice</title>
-                <link rel="stylesheet" type="text/css" href="/style.css" />
-                <script src="/jquery.js"></script>
-                <script src="/script.js"></script>
+                <link rel="stylesheet" type="text/css" href="style.css" />
+                <script src="jquery.js"></script>
+                <script src="script.js"></script>
             </head>
             <body>
               <div class="batch_page">
@@ -206,7 +214,10 @@ async fn gen_examples_page(req: Request<State>) -> tide::Result {
                 </div>
               </div>
             </body>
-        "#, first_level, last_level, first_level, last_level).into_bytes()))?;
+        "#,
+            first_level, last_level, first_level, last_level
+        )
+        .into_bytes()))?;
 
         gen_examples(state, &allowed_chars, &needed_chars, 50, |mut ex| {
             ex.gen_furigana(&req.state().jmdict_idx, &req.state().furigana_overrides);
@@ -221,12 +232,18 @@ async fn gen_examples_page(req: Request<State>) -> tide::Result {
                 if let Some(ents) = state.jmdict_idx.get(keb) {
                     for ent in ents.iter() {
                         let ent_r_ele = ent.children().find(|x| x.has_tag_name("r_ele")).unwrap();
-                        let ent_reb = ent_r_ele.children().find(|x| x.has_tag_name("reb")).unwrap();
+                        let ent_reb = ent_r_ele
+                            .children()
+                            .find(|x| x.has_tag_name("reb"))
+                            .unwrap();
                         let ent_reb = ent_reb.text().unwrap().trim();
                         if reb.map(|x| x != ent_reb).unwrap_or(false) {
                             continue;
                         }
-                        expl += &format!(r#"<tr><td style="word-break: keep-all">&nbsp;&nbsp;<span class="tab_large font_ja">{}</span>&nbsp;&nbsp;</td><td width="50%">"#, keb);
+                        expl += &format!(
+                            r#"<tr><td style="word-break: keep-all">&nbsp;&nbsp;<span class="tab_large font_ja">{}</span>&nbsp;&nbsp;</td><td width="50%">"#,
+                            keb
+                        );
 
                         for sense in ent.children().filter(|x| x.has_tag_name("sense")) {
                             if let Some(s) = sense.children().find(|x| x.has_tag_name("gloss")) {
@@ -236,7 +253,10 @@ async fn gen_examples_page(req: Request<State>) -> tide::Result {
                                 expl += s.text().unwrap().trim();
                             }
                         }
-                        expl += &format!(r#"</td><td style="word-break: keep-all" class="tab_large font_ja">{}</td></tr>"#, ent_reb);
+                        expl += &format!(
+                            r#"</td><td style="word-break: keep-all" class="tab_large font_ja">{}</td></tr>"#,
+                            ent_reb
+                        );
                     }
                 }
             }
@@ -247,20 +267,28 @@ async fn gen_examples_page(req: Request<State>) -> tide::Result {
                 "furi": ex.furigana_markup(),
                 "vocab": expl + "</table>",
             });
-            tx.send_blocking(Ok(format!("<script> add_example({}); </script>\n", serde_json::to_string(&item)?).into_bytes()))?;
+            tx.send_blocking(Ok(format!(
+                "<script> add_example({}); </script>\n",
+                serde_json::to_string(&item)?
+            )
+            .into_bytes()))?;
             Ok(())
         })?;
 
         tx.send_blocking(Ok(br#"
             </body>
             </html>
-        "#.to_vec()))?;
+        "#
+        .to_vec()))?;
 
         Ok::<_, anyhow::Error>(())
     });
 
     Ok(tide::Response::builder(200)
-        .body(tide::Body::from_reader(Box::pin(rx).into_async_read(), None))
+        .body(tide::Body::from_reader(
+            Box::pin(rx).into_async_read(),
+            None,
+        ))
         .content_type(mime::HTML)
         .build())
 }
@@ -284,7 +312,9 @@ fn gen_examples<F>(
     count: usize,
     mut callback: F,
 ) -> Result<()>
-where F: FnMut(Example) -> Result<()> {
+where
+    F: FnMut(Example) -> Result<()>,
+{
     let mut rng = thread_rng();
     let mut generated = 0;
 
@@ -292,7 +322,16 @@ where F: FnMut(Example) -> Result<()> {
         .examples
         .iter()
         .filter(|x| x.chars.diff(&allowed_chars).is_empty() && x.chars.intersects(&needed_chars))
-        .map(|ex| (ex, *ex.chars.iter().filter_map(|x| data.example_freq.get(&x)).min().unwrap()))
+        .map(|ex| {
+            (
+                ex,
+                *ex.chars
+                    .iter()
+                    .filter_map(|x| data.example_freq.get(&x))
+                    .min()
+                    .unwrap(),
+            )
+        })
         .collect::<Vec<_>>();
     let mut remaining_needed = needed_chars.clone();
 
diff --git a/static/style.css b/static/style.css
index c09e15b..fbe8e7d 100644
--- a/static/style.css
+++ b/static/style.css
@@ -171,3 +171,7 @@ details .chars {
 #gen_section.gen_hidden #gen_ex_display rt {
     visibility: hidden;
 }
+
+form p {
+    text-align: center;
+}
-- 
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