Feature: Collect contact information from users inside the chatbot (#1948)

* Add leads settings to chatflow configuration

* Add leads tab to chatflow configuration with options for lead capture

* Add database entity and migrations for leads

* Add endpoint for adding and fetching leads

* Show lead capture form in UI chat window when enabled

* Add view leads dialog

* Make export leads functional

* Add input for configuring message on successful lead capture

* Add migrations for adding lead email in chat message if available

* show lead email in view messages

* ui touch up

* Remove unused code and update how lead email is shown in view messages dialog

* Fix lead not getting saved

* Disable input when lead form is shown and save lead info to localstorage

* Fix lead capture form not working

* disabled lead save button until at least one form field is turned on, get rid of local storage _LEAD

* add leads API to as whitelist public endpoint

* Send leadEmail in internal chat inputs

* Fix condition for disabling input field and related buttons when lead is enabled/disabled and when lead is saved

* update leads ui

* update error message and alter table add column sqlite migration

---------

Co-authored-by: Henry <hzj94@hotmail.com>

packages/server/src/services/leads/index.ts

@@ -0,0 +1,43 @@
+import { v4 as uuidv4 } from 'uuid'
+import { StatusCodes } from 'http-status-codes'
+import { getRunningExpressApp } from '../../utils/getRunningExpressApp'
+import { Lead } from '../../database/entities/Lead'
+import { ILead } from '../../Interface'
+import { InternalFlowiseError } from '../../errors/internalFlowiseError'
+import { getErrorMessage } from '../../errors/utils'
+
+const getAllLeads = async (chatflowid: string) => {
+    try {
+        const appServer = getRunningExpressApp()
+        const dbResponse = await appServer.AppDataSource.getRepository(Lead).find({
+            where: {
+                chatflowid
+            }
+        })
+        return dbResponse
+    } catch (error) {
+        throw new InternalFlowiseError(StatusCodes.INTERNAL_SERVER_ERROR, `Error: leadsService.getAllLeads - ${getErrorMessage(error)}`)
+    }
+}
+
+const createLead = async (body: Partial<ILead>) => {
+    try {
+        const chatId = body.chatId ?? uuidv4()
+
+        const newLead = new Lead()
+        Object.assign(newLead, body)
+        Object.assign(newLead, { chatId })
+
+        const appServer = getRunningExpressApp()
+        const lead = appServer.AppDataSource.getRepository(Lead).create(newLead)
+        const dbResponse = await appServer.AppDataSource.getRepository(Lead).save(lead)
+        return dbResponse
+    } catch (error) {
+        throw new InternalFlowiseError(StatusCodes.INTERNAL_SERVER_ERROR, `Error: leadsService.createLead - ${getErrorMessage(error)}`)
+    }
+}
+
+export default {
+    createLead,
+    getAllLeads
+}