History parsing

src/history.rs

@@ -1,13 +1,18 @@
+use crate::dictionary::app_data_dir;
+use crate::lang::{WordData, WordOpenMode};
 use crate::{AppState, NavigatedPage, Page, RootMessage};
+use chrono::{DateTime, Utc};
 use iced::widget::*;
 use iced::{Element, Fill, Left, Task};
+use std::fs::File;
+use std::io::{BufRead, BufReader};
 use std::sync::{Arc, Mutex};
 use HistoryMessage::Back;
 
 #[derive(Clone)]
 pub struct HistoryState {
     set_id: u32,
-    list: Vec<HistoryItem>
+    list: Vec<HistoryItem>,
 }
 
 impl NavigatedPage<HistoryMessage> for HistoryState {
@@ -21,7 +26,10 @@ impl NavigatedPage<HistoryMessage> for HistoryState {
 
 impl HistoryState {
     pub fn new(id: u32, state: Arc<Mutex<AppState>>) -> Self {
-        Self { set_id: id, list: vec![] }
+        Self {
+            set_id: id,
+            list: get_history_of_set(id, &state.lock().unwrap().dictionary),
+        }
     }
 
     pub fn update(&mut self, message: HistoryMessage) -> Task<RootMessage> {
@@ -47,6 +55,54 @@ impl HistoryState {
     }
 }
 
+fn get_history_of_set(id: u32, words: &Vec<WordData>) -> Vec<HistoryItem> {
+    let app_dir = app_data_dir();
+    let head = app_dir.clone().join(format!("set_{}_history.csv", id));
+    let tail = app_dir.clone().join(format!("set_{}_history.csv", id));
+    let mut lines = Vec::new();
+    if tail.exists() {
+        let reader = BufReader::new(File::open(tail).unwrap());
+        for line in reader.lines() {
+            lines.push(line.unwrap());
+        }
+    }
+
+    if head.exists() {
+        let reader = BufReader::new(File::open(head).unwrap());
+        for line in reader.lines() {
+            lines.push(line.unwrap());
+        }
+    }
+
+    parse_history_items(lines, words)
+}
+
+fn parse_history_items(strings: Vec<String>, words: &Vec<WordData>) -> Vec<HistoryItem> {
+    let mut items = Vec::with_capacity(strings.len());
+    for string in strings {
+        if let [time, word, mode, before, after] = string.split(';').collect::<Vec<&str>>()[..] {
+            items.push(HistoryItem {
+                timestamp: DateTime::from_timestamp(time.parse().unwrap(), 0).unwrap(),
+                word: words
+                    .iter()
+                    .find(|w| w.id == word.parse::<u32>().unwrap())
+                    .unwrap()
+                    .clone(),
+                mode: match mode.parse::<u8>().unwrap() {
+                    2 => WordOpenMode::Hard,
+                    3 => WordOpenMode::Ok,
+                    4 => WordOpenMode::Easy,
+                    _ => WordOpenMode::None,
+                },
+                before: before.parse().unwrap(),
+                after: after.parse().unwrap(),
+            });
+        }
+    }
+
+    items
+}
+
 #[derive(Clone)]
 pub enum HistoryMessage {
     Back,
@@ -54,5 +110,9 @@ pub enum HistoryMessage {
 
 #[derive(Clone)]
 pub struct HistoryItem {
-
+    timestamp: DateTime<Utc>,
+    word: WordData,
+    mode: WordOpenMode,
+    before: u8,
+    after: u8,
 }