Create app.js

Initial commit, v0.1

apps/getaddr/app.js

@@ -0,0 +1,148 @@
+// Set the API endpoint and parameters
+const nominatimApi = 'https://nominatim.openstreetmap.org';
+const params = {
+  format: 'json',
+  addressdetails: 1,
+  zoom: 18,
+  extratags: 1
+};
+
+// Function to break a string into lines
+function breakStringIntoLines(str, maxWidth) {
+  const words = str.split(' ');
+  const lines = [];
+  let currentLine = '';
+  for (const word of words) {
+    if (currentLine.length + word.length + 1 > maxWidth) {
+      lines.push(currentLine);
+      currentLine = word;
+    } else {
+      if (currentLine!== '') {
+        currentLine +=' ';
+      }
+      currentLine += word;
+    }
+  }
+  lines.push(currentLine);
+  return lines;
+}
+
+// Function to clear the screen and display a message
+function showMessage(address, error, dir) {
+  g.clear();
+  g.reset();
+  g.setFontVector(16);
+  const addressLines = breakStringIntoLines(address, 20);
+  let y = 20;
+  for (const line of addressLines) {
+    g.drawString(line, 10, y);
+    y += 20;
+  }
+  if (error) {
+    y += 10;
+    const errorLines = breakStringIntoLines(error, 20);
+    for (const line of errorLines) {
+      g.drawString(line, 10, y);
+      y += 20;
+    }
+  }
+  g.drawString(`Direction: ${dir}`, 10, 150);
+  g.flip();
+}
+
+// Function to get the compass direction
+function getCompassDirection() {
+  const compass = Bangle.getCompass();
+  if (compass && compass.heading) {
+    const direction = Math.floor(compass.heading);
+    const directions = ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW'];
+    const index = Math.floor(((direction % 360) + 22.5) / 45) % 8;
+    if (index >= 0 && index < directions.length) {
+      return directions[index];
+    } else {
+      return 'Invalid index';
+    }
+  } else {
+    return 'No compass data';
+  }
+}
+
+// Variable to store the current address and error
+let currentAddress = 'Getting address...';
+let currentError = '';
+let lastUpdateTime = 0;
+
+// Function to get the current location
+function getCurrentLocation() {
+  Bangle.setGPSPower(1);
+  Bangle.setCompassPower(1);
+  Bangle.on('GPS', (gps) => {
+    if (gps.fix) {
+      const now = Date.now();
+      if (now - lastUpdateTime < 30000) return;
+      lastUpdateTime = now;
+      getStreetAndHouseNumber(gps.lat, gps.lon);
+    } else {
+      currentAddress = 'No GPS signal';
+      currentError = `Sats: ${gps.satellites}`;
+      showMessage(currentAddress, currentError, getCompassDirection());
+    }
+  });
+}
+
+// Function to get the street and house number
+function getStreetAndHouseNumber(lat, lon) {
+  const url = `${nominatimApi}/reverse`;
+  const paramsStr = Object.keys(params).map(key => `${key}=${encodeURIComponent(params[key])}`).join('&');
+  const fullUrl = `${url}?${paramsStr}&lat=${lat}&lon=${lon}&accept-language=de&format=json`;
+
+  Bangle.http(fullUrl).then(data => {
+    try {
+      const jsonData = JSON.parse(data.resp);
+      if (jsonData && jsonData.address) {
+        let street = jsonData.address.road;
+        if (street.includes('Straße')) {
+          street = street.replace('Straße', 'Str.');
+        } else if (street.includes('Street')) {
+          street = street.replace('Street', 'St.');
+        }
+        const houseNumber = jsonData.address.house_number;
+        const newAddress = `${street} ${houseNumber}`;
+        if (newAddress!== currentAddress) {
+          currentAddress = newAddress;
+          currentError = '';
+        }
+      } else {
+        const newAddress = 'No address';
+        if (newAddress!== currentAddress) {
+          currentAddress = newAddress;
+          currentError = '';
+        }
+      }
+    } catch (err) {
+      const newError = `Error: ${err}`;
+      if (newError!== currentError) {
+        currentError = newError;
+      }
+    }
+    showMessage(currentAddress, currentError, getCompassDirection());
+  }).catch(err => {
+    const newError = `Error: ${err}`;
+    if (newError!== currentError) {
+      currentError = newError;
+    }  
+    showMessage(currentAddress, currentError, getCompassDirection());
+  });
+}
+
+// Main function
+function main() {
+  showMessage('Getting address...', '', getCompassDirection());
+  getCurrentLocation();
+  setInterval(() => {
+    showMessage(currentAddress, currentError, getCompassDirection());  
+  }, 1000);
+}
+
+// Call the main function
+main();