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scripts/lib/data-file.js

@@ -0,0 +1,31 @@
+export class DataFile {
+    /**
+     * Read & write data to a JSON file.
+     *
+     * @param {NS} ns - Bitburner API
+     * @param path - Path to config file
+     */
+    constructor(ns, path) {
+        this.ns = ns;
+        this.path = path;
+    }
+
+    /**
+     * Load data file
+     *
+     * @returns {Promise<any>} - Saved data
+     */
+    async load() {
+        return JSON.parse(await this.ns.read(this.path) || 'null');
+    }
+
+    /**
+     * Save data to file
+     *
+     * @param values - Data to save
+     * @returns {Promise<void>} - Save complete
+     */
+    async save(values) {
+        await this.ns.write(this.path, JSON.stringify(values), 'w');
+    }
+}

scripts/lib/port-helper.js

@@ -0,0 +1,42 @@
+export class PortHelper {
+    /**
+     *
+     * @param ns
+     * @param port
+     * @param host
+     */
+    constructor(ns, port, host) {
+        this.ns = ns;
+        this.host = host;
+        this.portNum = port;
+        this.port = ns.getPortHandle(port);
+        this.callbacks = {};
+    }
+
+    check() {
+        const pending = [];
+        while(!this.port.empty()) pending.push(this.port.read());
+        pending.filter(p => {
+            try {
+                const payload = JSON.parse(p);
+                if(this.callbacks[payload.subject]) return !this.callbacks[payload.subject](payload.value);
+                if(this.callbacks['*']) return !this.callbacks['*'](payload.value);
+                return true;
+            } catch {
+                return true;
+            }
+        }).forEach(p => this.port.write(p));
+    }
+
+    subscribe(subject, callback) { if(typeof callback == 'function') this.callbacks[subject] = callback; }
+
+    send(subject, value) {
+        this.ns.writePort(this.portNum, JSON.stringify({
+            from: this.host,
+            subject,
+            value
+        }));
+    }
+
+    unsubscribe(subject) { delete this.callbacks[subject]; }
+}