add authentication support

dist/auth/JLINCAuthTool.js

@@ -0,0 +1,68 @@
+const { Tool } = require("@langchain/core/tools");
+const { JLINCTracer } = require("../tracer/index.js");
+const { authDecide, authInvoke, getDescription, getName } = require("./common.js");
+
+/**
+ * @typedef {import('./common').JLINCConfig} JLINCConfig
+ */
+
+/**
+ * @typedef {Object} JLINCAuthToolFields
+ * @property {JLINCConfig} config
+ * @property {Tool} jlincAuthDecision
+ * @property {Tool} targetAuthorized
+ * @property {Tool|null} targetNotAuthorized
+ */
+
+class JLINCAuthTool extends Tool {
+  /**
+   * @param {JLINCAuthToolFields} fields
+   */
+  constructor({ config, jlincAuthDecision, targetAuthorized, targetNotAuthorized }) {
+    super({
+      name: "jlinc_auth_tool",
+      description: "", // overridden dynamically
+    });
+    Object.defineProperty(this, "name", {
+      enumerable: true,
+      configurable: true,
+      writable: true,
+      value: getName(targetAuthorized, targetNotAuthorized)
+    });
+    Object.defineProperty(this, "description", {
+      enumerable: true,
+      configurable: true,
+      writable: true,
+      value: getDescription(targetAuthorized, targetNotAuthorized, 'Tool')
+    });
+    /** @type {JLINCConfig} */
+    this.config = config;
+    /** @type {Tool} */
+    this.jlincAuthDecision = jlincAuthDecision;
+    /** @type {Tool} */
+    this.targetAuthorized = targetAuthorized;
+    /** @type {Tool|null} */
+    this.targetNotAuthorized = targetNotAuthorized;
+    /** @type {JLINCTracer} */
+    this.tracer = new JLINCTracer(config);
+    /** @type {string} */
+    this.authType = 'Tool';
+  }
+
+  /**
+   * @template TInput
+   * @template {undefined | ToolRunnableConfig} TConfig
+   * @template TOutput
+   *
+   * @param {TInput} input
+   * @param {TConfig} [config]
+   * @returns {Promise<ToolReturnType<TInput, TConfig, TOutput>>}
+   */
+  async invoke(input, runManager) {
+    return await authInvoke(this, input);
+  }
+}
+
+module.exports = {
+  JLINCAuthTool,
+};