Alte Version abgeändert auf neue Datebank /-Struktur).

akws/build_akws.js

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+// After doing a wikidata query use the file query.json to build or rebuild the databae th1_akws
+// 2020-10-07
+
+const { MongoClient } = require('mongodb');
+const fs = require('fs').promises;
+
+// Consts
+const PORT = process.env.SERVERPORT || 3005;											// Port for server
+
+const debug = (process.env.DEBUG == "true");
+const MONGOHOST = process.env.MONGOHOST || 'localhost';
+const MONGOPORT = process.env.MONGOPORT || 27017;
+const MONGOAUTH = (process.env.MONGOAUTH == "true");
+const MONGOUSRP = process.env.MONGOUSRP || "";
+const MONGOBASE = process.env.MONGOBASE || 'allsensors';
+
+const MONGO_URL = MONGOAUTH ? 'mongodb://'+MONGOUSRP+'@' + MONGOHOST + ':' + MONGOPORT + '/?authSource=admin' :  'mongodb://'+MONGOHOST+':'+MONGOPORT;	// URL to mongo database
+
+// Read whole file 'query.json' int memory
+async function readQuery(name) {
+    try {
+        const query = await fs.readFile(name);
+        return JSON.parse(query);
+    } catch (e) {
+        console.error(`File ${name} not found. ${e}`);
+    }
+}
+
+// Find and return one entry from the database
+// Params
+//      name:       name of entry
+//
+//  Return
+//      null if not found, else complete entry
+async function findOneEntry(client, name) {
+    const erg = await client.db("allsensors").collection("th1_akws")
+        .findOne({name:name});
+//    console.log(erg);
+    return erg;
+}
+
+
+async function getAllEntries(client) {
+    const cursor = client.db("allsensors").collection("th1_akws")
+        .find({});
+    const results = await cursor.toArray();
+    console.log(`Anzahl der Einträge: ${results.length}`);
+}
+
+
+async function main(){
+    const query = await readQuery('akws/query.json');
+
+    const client = new MongoClient(MONGO_URL, {useNewUrlParser: true , useUnifiedTopology: true});
+    try {
+        await client.connect();
+        for(let entry of query) {
+            if (await findOneEntry(client, entry.name) == null) {
+                const result = await client.db("allsensors").collection("th1_akws")
+                    .insertOne(entry);
+                console.log(`new entry ${entry.name} with result: ${result.insertedID}`);
+            } else {
+                process.stdout.write('.');
+            }
+        }
+    } catch(e) {
+        console.error(e);
+    } finally {
+        await client.close();
+    }
+
+}
+
+main().catch(console.error());