IBM Watsonx embeddings node (#3648)

* Add icon image

* Add embeddings node

* Fix typo

Author: eduardconstantin

packages/components/nodes/embeddings/IBMWatsonxEmbedding/IBMWatsonxEmbedding.ts

@@ -0,0 +1,107 @@
+import { WatsonxEmbeddings, WatsonxInputEmbeddings } from '@langchain/community/embeddings/ibm'
+import { WatsonxAuth } from '@langchain/community/dist/types/ibm'
+import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
+import { getBaseClasses, getCredentialData, getCredentialParam } from '../../../src/utils'
+
+class IBMWatsonx_Embeddings implements INode {
+    label: string
+    name: string
+    version: number
+    type: string
+    icon: string
+    category: string
+    description: string
+    baseClasses: string[]
+    credential: INodeParams
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'IBM Watsonx Embeddings'
+        this.name = 'ibmEmbedding'
+        this.version = 1.0
+        this.type = 'WatsonxEmbeddings'
+        this.icon = 'ibm.png'
+        this.category = 'Embeddings'
+        this.description = 'Generate embeddings for a given text using open source model on IBM Watsonx'
+        this.baseClasses = [this.type, ...getBaseClasses(WatsonxEmbeddings)]
+        this.credential = {
+            label: 'Connect Credential',
+            name: 'credential',
+            type: 'credential',
+            credentialNames: ['ibmWatsonx']
+        }
+        this.inputs = [
+            {
+                label: 'Model Name',
+                name: 'modelName',
+                type: 'string',
+                default: 'ibm/slate-30m-english-rtrvr'
+            },
+            {
+                label: 'Truncate Input Tokens',
+                name: 'truncateInputTokens',
+                type: 'number',
+                description: 'Truncate the input tokens.',
+                step: 1,
+                optional: true,
+                additionalParams: true
+            },
+            {
+                label: 'Max Retries',
+                name: 'maxRetries',
+                type: 'number',
+                description: 'The maximum number of retries.',
+                step: 1,
+                optional: true,
+                additionalParams: true
+            },
+            {
+                label: 'Max Concurrency',
+                name: 'maxConcurrency',
+                type: 'number',
+                description: 'The maximum number of concurrencies.',
+                step: 1,
+                optional: true,
+                additionalParams: true
+            }
+        ]
+    }
+
+    async init(nodeData: INodeData, _: string, options: ICommonObject): Promise<any> {
+        const modelName = nodeData.inputs?.modelName as string
+        const truncateInputTokens = nodeData.inputs?.truncateInputTokens as string
+        const maxRetries = nodeData.inputs?.maxRetries as string
+        const maxConcurrency = nodeData.inputs?.maxConcurrency as string
+
+        const credentialData = await getCredentialData(nodeData.credential ?? '', options)
+        const version = getCredentialParam('version', credentialData, nodeData)
+        const serviceUrl = getCredentialParam('serviceUrl', credentialData, nodeData)
+        const projectId = getCredentialParam('projectId', credentialData, nodeData)
+        const watsonxAIAuthType = getCredentialParam('watsonxAIAuthType', credentialData, nodeData)
+        const watsonxAIApikey = getCredentialParam('watsonxAIApikey', credentialData, nodeData)
+        const watsonxAIBearerToken = getCredentialParam('watsonxAIBearerToken', credentialData, nodeData)
+
+        const auth = {
+            version,
+            serviceUrl,
+            projectId,
+            watsonxAIAuthType,
+            watsonxAIApikey,
+            watsonxAIBearerToken
+        }
+
+        const obj: WatsonxInputEmbeddings & WatsonxAuth = {
+            ...auth,
+            model: modelName
+        }
+
+        if (truncateInputTokens) obj.truncateInputTokens = parseInt(truncateInputTokens, 10)
+        if (maxRetries) obj.maxRetries = parseInt(maxRetries, 10)
+        if (maxConcurrency) obj.maxConcurrency = parseInt(maxConcurrency, 10)
+
+        const model = new WatsonxEmbeddings(obj)
+        return model
+    }
+}
+
+module.exports = { nodeClass: IBMWatsonx_Embeddings }