From 25a76e90fe534351184caf519e36745f50df9081 Mon Sep 17 00:00:00 2001
From: sigmasternchen <git@sigma-star.io>
Date: Fri, 20 Sep 2024 21:36:32 +0200
Subject: [PATCH] feat: Select random word from list

---
 src/components/App.jsx | 13 ++++++++++++-
 src/random/sfc32.js    | 24 ++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 src/random/sfc32.js

diff --git a/src/components/App.jsx b/src/components/App.jsx
index a66fade..0f6d353 100644
--- a/src/components/App.jsx
+++ b/src/components/App.jsx
@@ -5,6 +5,10 @@ import {id, objectMap, zip} from "../utils";
 import {Keyboard} from "./Keyboard";
 import {CellState, sortCellStates} from "../model/CellState";
 import {Toast} from "./Toast";
+import dictionary from "../data/dictionary.json"
+import {newSFC32} from "../random/sfc32";
+
+const validWordsRegex = /[A-Z]+/;
 
 export const App = () => {
     const [pastGuesses, setPastGuesses] = useState([]);
@@ -13,9 +17,16 @@ export const App = () => {
     const [message, setMessage] = useState("");
 
     const length = 5;
-    const correct = "guess";
+    const availableWords = dictionary
+        .filter(word => validWordsRegex.test(word))
+        .filter(word => word.length === length);
 
+    const today = Date.now() / 1000 / 60 / 60 / 24;
+    const random = newSFC32(today);
 
+    const correct = availableWords[Math.floor(random() * availableWords.length)];
+
+    console.log(correct)
 
     const fieldDataForPastGuesses = pastGuesses
         .map(guess => guess.toUpperCase())
diff --git a/src/random/sfc32.js b/src/random/sfc32.js
new file mode 100644
index 0000000..8392caf
--- /dev/null
+++ b/src/random/sfc32.js
@@ -0,0 +1,24 @@
+export const newSFC32 = seed => {
+    // see https://github.com/bryc/code/blob/master/jshash/PRNGs.md#sfc32
+
+    let a = 0 | 0;
+    let b = seed >> 0;
+    let c = seed >> 16; // crutch because JS doesn't have 64 bit ints
+    let d = 1 | 0;
+
+    const next = () => {
+        let t = (a + b | 0) + d | 0;
+        d = d + 1 | 0;
+        a = b ^ b >>> 9;
+        b = c + (c << 3) | 0;
+        c = c << 21 | c >>> 11;
+        c = c + t | 0;
+        return (t >>> 0) / 4294967296;
+    }
+
+    for (let i = 0; i < 12; i++) {
+        next();
+    }
+
+    return next;
+}
\ No newline at end of file