From b743fc24ec3ba1aa3ff9bfe5c802019e90034312 Mon Sep 17 00:00:00 2001
From: Joris
Date: Wed, 26 Jan 2022 14:06:45 +0100
Subject: Shuffle initial presentiation order from insert order

---
 src/db/db.rs | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

(limited to 'src')

diff --git a/src/db/db.rs b/src/db/db.rs
index 93c9564..a3398e2 100644
--- a/src/db/db.rs
+++ b/src/db/db.rs
@@ -4,6 +4,7 @@ use crate::{
     util::serialization,
 };
 use anyhow::Result;
+use rand::{rngs::ThreadRng, Rng};
 use rusqlite::{params, Connection};
 use rusqlite_migration::{Migrations, M};
 use std::time::SystemTime;
@@ -18,22 +19,20 @@ pub fn init() -> Result<Connection> {
 pub fn add_missing_deck_entries(conn: &Connection, entries: Vec<Entry>) -> Result<()> {
     let now = get_current_time()?;
     let ready = now;
-    let day: u64 = 60 * 60 * 24;
 
     let state = serde_json::to_string(&space_repetition::init())?;
+    let mut rng = rand::thread_rng();
 
     for entry in entries {
         let concat_1 = serialization::words_to_line(&entry.part_1);
         let concat_2 = serialization::words_to_line(&entry.part_2);
 
-        for (i, w) in entry.part_1.iter().enumerate() {
-            let r = ready + (i as u64) * day;
-            insert(&conn, now, r, &w, &concat_2, &state)?;
+        for w in entry.part_1.iter() {
+            insert(&conn, &mut rng, now, ready, &w, &concat_2, &state)?;
         }
 
-        for (i, w2) in entry.part_2.iter().enumerate() {
-            let r = ready + ((entry.part_1.len() + i) as u64) * day;
-            insert(&conn, now, r, &w2, &concat_1, &state)?;
+        for w in entry.part_2.iter() {
+            insert(&conn, &mut rng, now, ready, &w, &concat_1, &state)?;
         }
     }
 
@@ -44,19 +43,24 @@ pub fn add_missing_deck_entries(conn: &Connection, entries: Vec<Entry>) -> Resul
 
 fn insert(
     conn: &Connection,
+    rng: &mut ThreadRng,
     now: u64,
     ready: u64,
     question: &String,
     responses: &String,
     state: &String,
 ) -> Result<()> {
+    // Subtract a random amount of time so that cards are not initially given in the same order as
+    // in the deck
+    let ready_sub: u64 = rng.gen_range(0..100);
+
     conn.execute(
         "
         INSERT INTO cards (question, responses, state, created, deck_read, ready)
         VALUES (?, ?, ?, ?, ?, ?)
         ON CONFLICT (question) DO UPDATE SET deck_read = ?, deleted = null
         ",
-        params![question, responses, state, now, now, ready, now],
+        params![question, responses, state, now, now, ready - ready_sub, now],
     )?;
 
     Ok(())
-- 
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