add authentication support

dist/auth/JLINCAuthDecision.js

@@ -0,0 +1,79 @@
+const { Tool } = require("@langchain/core/tools");
+const axios = require("axios");
+
+/**
+ * @typedef {import('./common').JLINCConfig} JLINCConfig
+ */
+
+class JLINCAuthDecision extends Tool {
+  /**
+   * @param {JLINCConfig} fields
+   */
+  constructor(config) {
+    super({
+      name: "jlinc_auth",
+      description: "Authorization via AuthZEN format.",
+    });
+    Object.defineProperty(this, "name", {
+      enumerable: true,
+      configurable: true,
+      writable: true,
+      value: "jlinc-auth"
+    });
+    Object.defineProperty(this, "description", {
+      enumerable: true,
+      configurable: true,
+      writable: true,
+      value: "Authorization via AuthZEN format."
+    });
+    /** @type {JLINCConfig} */
+    this.config = config;
+    /** @type {Boolean} */
+    this.authenticated = false;
+  }
+
+  /**
+   * @param {any} payload
+   * @returns {Promise<any>}
+   */
+  async postToApi(auth) {
+    const response = await axios.post(
+      `${this.config.dataStoreApiUrl}/api/v1/auth`,
+      auth,
+      {
+        headers: {
+          'Authorization': `Bearer ${this.config.dataStoreApiKey}`,
+        }
+      }
+    );
+    return response.data;
+  }
+
+  /**
+   * @param {auth} auth
+   * @returns {Promise<boolean>} - authenticated
+   */
+  async evaluate(auth) {
+    this.authenticated = false;
+    try {
+      this.authenticated = (await this.postToApi(auth)).decision;
+    } catch (e) {
+      console.log(`[JLINCAuthTool] Error connecting to API, flagging as unauthorized`);
+      if (this.config.debug) console.error(e)
+    }
+    if (this.config.debug)
+      console.log(`[JLINCAuth] Got authorization of: ${this.authenticated}`);   
+    return this.authenticated;
+  }
+
+  /**
+   * @returns {boolean} - authenticated
+   */
+  getAuth() {
+    return this.authenticated;
+  }
+}
+
+module.exports = {
+  JLINCAuthDecision,
+};