Adding checksum-db script

- Usage: npm run checksum-db
- Prints the total records and CRC32 checksum for each node table stored.

debug/checksum-db.js

@@ -0,0 +1,29 @@
+'use strict';
+const Database = require('../src/database');
+
+function CheckDB() {
+    return new Promise((resolve, reject) => {
+        const config = require(`../args/config.json`);
+        Database.init(config["sql_user"], config["sql_pwd"], config["sql_db"], config["sql_host"]).then(result => {
+            let ds = require("../src/data_structure.json");
+            let cols = [];
+            for (let s in ds)
+                for (let c in ds[s])
+                    cols.push(ds[s][c]);
+            let crc_ = "SUM(" + cols.map(c => `IFNULL(CRC32(${c}), 0)`).join('+') + ")";
+            Database.DB.listTable().then(disks => {
+                let promises = disks.map(d => Database.query(`SELECT ? AS disk, COUNT(*) AS total_rec, ${crc_} AS crc_checksum FROM _${d}`, d));
+                Promise.allSettled(promises).then(results => {
+                    let records = results.filter(r => r.status === "fulfilled").map(r => r.value[0]);
+                    console.table(records);
+                    let errors = results.filter(r => r.status === "rejected");
+                    if (errors.length)
+                        console.error(errors.map(r => r.reason));
+                    resolve(true);
+                })
+            }).catch(error => reject(error));
+        }).catch(error => reject(error));
+    })
+}
+
+CheckDB().then(_ => process.exit(0)).catch(error => { console.error(error); process.exit(1); })

package.json

@@ -15,6 +15,7 @@
         "setup": "node setup/post-install.js",
         "configure": "node setup/configure-settings.js",
         "reset-password": "node setup/reset-password.js",
+        "checksum-db": "node debug/checksum-db.js",
         "start": "node start.js"
     },
     "repository": {