add custom tool

packages/components/nodes/tools/CustomTool/CustomTool.ts

@@ -0,0 +1,108 @@
+import { ICommonObject, IDatabaseEntity, INode, INodeData, INodeOptionsValue, INodeParams } from '../../../src/Interface'
+import { getBaseClasses } from '../../../src/utils'
+import { DynamicStructuredTool } from './core'
+import { z } from 'zod'
+import { DataSource } from 'typeorm'
+
+class CustomTool_Tools implements INode {
+    label: string
+    name: string
+    description: string
+    type: string
+    icon: string
+    category: string
+    baseClasses: string[]
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'Custom Tool'
+        this.name = 'customTool'
+        this.type = 'CustomTool'
+        this.icon = 'customtool.svg'
+        this.category = 'Tools'
+        this.description = `Use custom tool you've created in Flowise within chatflow`
+        this.inputs = [
+            {
+                label: 'Select Tool',
+                name: 'selectedTool',
+                type: 'asyncOptions',
+                loadMethod: 'listTools'
+            }
+        ]
+        this.baseClasses = [this.type, 'Tool', ...getBaseClasses(DynamicStructuredTool)]
+    }
+
+    //@ts-ignore
+    loadMethods = {
+        async listTools(nodeData: INodeData, options: ICommonObject): Promise<INodeOptionsValue[]> {
+            const returnData: INodeOptionsValue[] = []
+
+            const appDataSource = options.appDataSource as DataSource
+            const databaseEntities = options.databaseEntities as IDatabaseEntity
+
+            if (appDataSource === undefined || !appDataSource) {
+                return returnData
+            }
+
+            const tools = await appDataSource.getRepository(databaseEntities['Tool']).find()
+
+            for (let i = 0; i < tools.length; i += 1) {
+                const data = {
+                    label: tools[i].name,
+                    name: tools[i].id,
+                    description: tools[i].description
+                } as INodeOptionsValue
+                returnData.push(data)
+            }
+            return returnData
+        }
+    }
+
+    async init(nodeData: INodeData, input: string, options: ICommonObject): Promise<any> {
+        const selectedToolId = nodeData.inputs?.selectedTool as string
+
+        const appDataSource = options.appDataSource as DataSource
+        const databaseEntities = options.databaseEntities as IDatabaseEntity
+
+        try {
+            const tool = await appDataSource.getRepository(databaseEntities['Tool']).findOneBy({
+                id: selectedToolId
+            })
+
+            if (!tool) throw new Error(`Tool ${selectedToolId} not found`)
+            const obj = {
+                name: tool.name,
+                description: tool.description,
+                schema: z.object(convertSchemaToZod(tool.schema)),
+                code: tool.func
+            }
+            return new DynamicStructuredTool(obj)
+        } catch (e) {
+            throw new Error(e)
+        }
+    }
+}
+
+const convertSchemaToZod = (schema: string) => {
+    try {
+        const parsedSchema = JSON.parse(schema)
+        const zodObj: any = {}
+        for (const sch of parsedSchema) {
+            if (sch.type === 'string') {
+                if (sch.required) z.string({ required_error: `${sch.property} required` }).describe(sch.description)
+                zodObj[sch.property] = z.string().describe(sch.description)
+            } else if (sch.type === 'number') {
+                if (sch.required) z.number({ required_error: `${sch.property} required` }).describe(sch.description)
+                zodObj[sch.property] = z.number().describe(sch.description)
+            } else if (sch.type === 'boolean') {
+                if (sch.required) z.boolean({ required_error: `${sch.property} required` }).describe(sch.description)
+                zodObj[sch.property] = z.boolean().describe(sch.description)
+            }
+        }
+        return zodObj
+    } catch (e) {
+        throw new Error(e)
+    }
+}
+
+module.exports = { nodeClass: CustomTool_Tools }

packages/components/nodes/tools/CustomTool/core.ts

@@ -0,0 +1,78 @@
+import { z } from 'zod'
+import { CallbackManagerForToolRun } from 'langchain/callbacks'
+import { StructuredTool, ToolParams } from 'langchain/tools'
+import { NodeVM } from 'vm2'
+import { availableDependencies } from '../../../src/utils'
+
+export interface BaseDynamicToolInput extends ToolParams {
+    name: string
+    description: string
+    code: string
+    returnDirect?: boolean
+}
+
+export interface DynamicStructuredToolInput<
+    // eslint-disable-next-line
+    T extends z.ZodObject<any, any, any, any> = z.ZodObject<any, any, any, any>
+> extends BaseDynamicToolInput {
+    func?: (input: z.infer<T>, runManager?: CallbackManagerForToolRun) => Promise<string>
+    schema: T
+}
+
+export class DynamicStructuredTool<
+    // eslint-disable-next-line
+    T extends z.ZodObject<any, any, any, any> = z.ZodObject<any, any, any, any>
+> extends StructuredTool {
+    name: string
+
+    description: string
+
+    code: string
+
+    func: DynamicStructuredToolInput['func']
+
+    schema: T
+
+    constructor(fields: DynamicStructuredToolInput<T>) {
+        super(fields)
+        this.name = fields.name
+        this.description = fields.description
+        this.code = fields.code
+        this.func = fields.func
+        this.returnDirect = fields.returnDirect ?? this.returnDirect
+        this.schema = fields.schema
+    }
+
+    protected async _call(arg: z.output<T>): Promise<string> {
+        let sandbox: any = {}
+        if (typeof arg === 'object' && Object.keys(arg).length) {
+            for (const item in arg) {
+                sandbox[`$${item}`] = arg[item]
+            }
+        }
+
+        const options = {
+            console: 'inherit',
+            sandbox,
+            require: {
+                external: false as boolean | { modules: string[] },
+                builtin: ['*']
+            }
+        } as any
+
+        const external = JSON.stringify(availableDependencies)
+        if (external) {
+            const deps = JSON.parse(external)
+            if (deps && deps.length) {
+                options.require.external = {
+                    modules: deps
+                }
+            }
+        }
+
+        const vm = new NodeVM(options)
+        const response = await vm.run(`module.exports = async function() {${this.code}}()`, __dirname)
+
+        return response
+    }
+}

packages/components/nodes/tools/CustomTool/customtool.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-tool" width="24" height="24" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round">
+   <path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
+   <path d="M7 10h3v-3l-3.5 -3.5a6 6 0 0 1 8 8l6 6a2 2 0 0 1 -3 3l-6 -6a6 6 0 0 1 -8 -8l3.5 3.5"></path>
+</svg>