Remove unused code

static/js/BLE.js

@@ -1,118 +0,0 @@
-let characteristic = null;
-let prevRes = null;
-
-let btn = document.querySelector("#ble-connect");
-
-function delay(ms) {
-  return new Promise((resolve) => setTimeout(resolve, ms));
-}
-
-async function connect(props) {
-  const device = await navigator.bluetooth.requestDevice({
-    filters: [{ services: ["cycling_speed_and_cadence"] }],
-    acceptAllDevices: false,
-  });
-  console.log(`%c\n👩🏼‍⚕️`, "font-size: 82px;", "Starting CSC...\n\n");
-  const server = await device.gatt.connect();
-  await delay(500);
-  console.log("Getting Service...");
-  const service = await server.getPrimaryService("cycling_speed_and_cadence");
-  console.log("Getting Characteristic...");
-  characteristic = await service.getCharacteristic("csc_measurement");
-  await characteristic.startNotifications();
-  console.log("> Notifications started");
-  characteristic.addEventListener("characteristicvaluechanged", props.onChange);
-  console.log("> Characteristic value changed event listener added");
-
-  btn.classList.remove("bg-blue-600");
-  btn.classList.add("bg-green-600");
-}
-
-async function disconnect() {
-  if (characteristic) {
-    try {
-      await characteristic.stopNotifications();
-      log("> Notifications stopped");
-      characteristic.removeEventListener(
-        "characteristicvaluechanged",
-        handleNotifications
-      );
-      btn.classList.remove("bg-green-600");
-      btn.classList.add("bg-blue-600");
-    } catch (error) {
-      console.log("Argh! " + error);
-      swal("Oops", error, "error");
-    }
-  }
-}
-
-function parseCSC(e) {
-  const value = e.target.value;
-  const flags = value.getUint8(0, true);
-  const hasWheel = !!(flags & 0x01);
-  const hasCrank = !!(flags & 0x02);
-  let index = 1;
-  const res = {
-    wheelRevs: null,
-    wheelTime: null,
-    crankRevs: null,
-    crankTime: null,
-  };
-  if (hasWheel) {
-    res.wheelRevs = value.getUint32(index, true);
-    index += 4;
-    res.wheelTime = value.getUint16(index, true);
-    index += 2;
-  }
-  if (hasCrank) {
-    res.crankRevs = value.getUint16(index, true);
-    index += 2;
-    res.crankTime = value.getUint16(index, true);
-    index += 2;
-  }
-  console.log("CSC", res);
-  if (prevRes) {
-    let rpm = revsToRPM(prevRes, res);
-    if (rpm > 0)
-      fetch("/cadence", {
-        method: "POST",
-        headers: {
-          Accept: "application/json, text/plain, */*",
-          "Content-Type": "application/json",
-        },
-        body: JSON.stringify({ rpm: parseFloat(rpm.toFixed(2)), id: 1 }),
-      });
-  }
-  prevRes = res;
-  return res;
-}
-
-function revsToRPM(prevRes, res) {
-  const deltaRevs = res.crankRevs - prevRes.crankRevs;
-  if (deltaRevs === 0) {
-    // no rotation
-    return 0;
-  }
-
-  let deltaTime = (res.crankTime - prevRes.crankTime) / 1024;
-  if (deltaTime < 0) {
-    // time counter wraparound
-    deltaTime += Math.pow(2, 16) / 1024;
-  }
-  deltaTime /= 60; // seconds to minutes
-
-  const rpm = deltaRevs / deltaTime;
-  return rpm;
-}
-
-btn.addEventListener("click", () => {
-  if (!characteristic) {
-    connect({
-      onChange: parseCSC,
-    }).catch((err) => {
-      swal("Oops", err, "error");
-    });
-  } else {
-    disconnect();
-  }
-});