counties, pagination, filter count, show total results

bizmatch-server/src/utils/importCounties.ts

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+import * as fs from 'fs';
+import * as readline from 'readline';
+
+interface CityData {
+  city: string;
+  stateShort: string;
+  stateFull: string;
+  county: string;
+  cityAlias: string;
+}
+
+interface StateCountyData {
+  state: string;
+  state_full: string;
+  counties: string[];
+}
+
+async function parseData(filePath: string): Promise<CityData[]> {
+  const fileStream = fs.createReadStream(filePath);
+  const rl = readline.createInterface({
+    input: fileStream,
+    crlfDelay: Infinity,
+  });
+
+  const data: CityData[] = [];
+  let isFirstLine = true;
+
+  for await (const line of rl) {
+    if (isFirstLine) {
+      isFirstLine = false;
+      continue; // Skip the first line
+    }
+    const [city, stateShort, stateFull, county, cityAlias] = line.split('|');
+    data.push({ city, stateShort, stateFull, county, cityAlias });
+  }
+
+  return data;
+}
+
+function transformData(data: CityData[]): StateCountyData[] {
+  const stateMap: { [key: string]: { stateFull: string; counties: Set<string> } } = {};
+
+  data.forEach(item => {
+    if (!stateMap[item.stateShort]) {
+      stateMap[item.stateShort] = {
+        stateFull: item.stateFull,
+        counties: new Set(),
+      };
+    }
+    stateMap[item.stateShort].counties.add(item.county);
+  });
+
+  return Object.entries(stateMap).map(([state, value]) => ({
+    state,
+    state_full: value.stateFull,
+    counties: Array.from(value.counties).sort(),
+  }));
+}
+
+async function main() {
+  const filePath = './src/assets/counties_raw.csv'; // Ersetze diesen Pfad mit dem Pfad zu deiner Datei
+  const cityData = await parseData(filePath);
+  const stateCountyData = transformData(cityData);
+
+  console.log(JSON.stringify(stateCountyData, null, 2));
+}
+
+main().catch(err => console.error(err));