dollcode: decode

dollcode/index.html

@@ -47,12 +47,14 @@
   </p>
 </section>
 <section>
-  <p>input a number</p>
+  <p>input a number or dollcode</p>
   <input type="string" id="id" value="41666" placeholder="41666" />
   <input type="radio" id="decimal" name="radix" value="10" checked />
   <label for="decimal">Decimal (base10)</label>
   <input type="radio" id="hex" name="radix" value="16" />
   <label for="hex">Hexadecimal (base16)</label>
+  <input type="radio" id="dollcode" name="radix" value="dollcode" />
+  <label for="dollcode">dollcode</label>
   <div>
     <div id="output">▖▘▌▘▘▌▌▌▖▘</div>
   </div>
@@ -98,6 +100,22 @@
     return output.join("");
   };
 
+  const parseDollcode = (code) => {
+    // reverse the nibs!
+    const nibs = code.trim().split("").reverse();
+
+    console.log({ nibs });
+
+    return nibs
+      .map((nib) => (nib === "▖" ? 1 : nib === "▘" ? 2 : 3))
+      .reduce((acc, val, index) => {
+        const r = val * Math.pow(3, index);
+        const res = r + acc;
+        console.log({ acc, val, index, r, res });
+        return res;
+      }, 0);
+  };
+
   const setOutput = (t) => {
     document.querySelector("#output").innerHTML = t;
   };
@@ -108,9 +126,19 @@
 
   const updateEvent = () => {
     const id = document.querySelector("#id").value;
-    const number = parseInt(id, getIDRadix());
 
+    if (document.querySelector("#dollcode").checked) {
+      const number = parseDollcode(id);
+      console.log({ number });
+      setOutput(
+        `<ul><li>dec: ${number.toString(10)}</li><li>hex: ${number.toString(
+          16
+        )}</li></ul>`
+      );
+    } else {
+      const number = parseInt(id, getIDRadix());
       setOutput(genCode(number));
+    }
   };
 
   document.querySelectorAll("input").forEach((x) => {