add config option, if dlt-connector is enabled, write communities list for dlt gradido node server out in its home folder as communities.json on each validate communities run

backend/src/config/index.ts

@@ -43,6 +43,7 @@ const DLT_CONNECTOR_PORT = process.env.DLT_CONNECTOR_PORT ?? 6010
 const dltConnector = {
   DLT_CONNECTOR: process.env.DLT_CONNECTOR === 'true' || false,
   DLT_CONNECTOR_URL: process.env.DLT_CONNECTOR_URL ?? `${COMMUNITY_URL}:${DLT_CONNECTOR_PORT}`,
+  DLT_GRADIDO_NODE_SERVER_HOME_FOLDER: process.env.DLT_GRADIDO_NODE_SERVER_HOME_FOLDER ?? '~/.gradido',
 }
 
 const community = {

backend/src/config/schema.ts

@@ -79,6 +79,10 @@ export const schema = Joi.object({
     .when('DLT_CONNECTOR', { is: true, then: Joi.required() })
     .description('The URL for GDT API endpoint'),
 
+  DLT_GRADIDO_NODE_SERVER_HOME_FOLDER: Joi.string()
+    .default('~/.gradido')
+    .description('The home folder for the gradido dlt node server'),
+
   EMAIL: Joi.boolean()
     .default(false)
     .description('Enable or disable email functionality')

backend/src/federation/client/1_0/model/PublicCommunityInfo.ts

@@ -4,4 +4,5 @@ export interface PublicCommunityInfo {
   creationDate: Date
   publicKey: string
   publicJwtKey: string
+  hieroTopicId: string | null
 }

backend/src/federation/validateCommunities.ts

@@ -2,6 +2,7 @@ import {
   Community as DbCommunity,
   FederatedCommunity as DbFederatedCommunity,
   getHomeCommunity,
+  getReachableCommunities,
 } from 'database'
 import { IsNull } from 'typeorm'
 
@@ -15,6 +16,9 @@ import { getLogger } from 'log4js'
 import { startCommunityAuthentication } from './authenticateCommunities'
 import { PublicCommunityInfoLoggingView } from './client/1_0/logging/PublicCommunityInfoLogging.view'
 import { ApiVersionType } from 'core'
+import { CONFIG } from '@/config'
+import * as path from 'node:path'
+import * as fs from 'node:fs'
 
 const logger = getLogger(`${LOG4JS_BASE_CATEGORY_NAME}.federation.validateCommunities`)
 
@@ -83,6 +87,8 @@ export async function validateCommunities(): Promise<void> {
       logger.error(`Error:`, err)
     }
   }
+  // export communities for gradido dlt node server
+  await exportCommunitiesToDltNodeServer()
 }
 
 export async function writeJwtKeyPairInHomeCommunity(): Promise<DbCommunity> {
@@ -138,6 +144,52 @@ async function writeForeignCommunity(
     com.publicKey = dbCom.publicKey
     com.publicJwtKey = pubInfo.publicJwtKey
     com.url = dbCom.endPoint
+    com.hieroTopicId = pubInfo.hieroTopicId
     await DbCommunity.save(com)
   }
 }
+
+// prototype, later add api call to gradido dlt node server for adding/updating communities
+type CommunityForDltNodeServer = {
+  communityId: string
+  hieroTopicId: string
+  alias: string
+  folder: string
+}
+async function exportCommunitiesToDltNodeServer(): Promise<void> {
+  if (!CONFIG.DLT_CONNECTOR) {
+    return Promise.resolve()
+  }
+  const folder = CONFIG.DLT_GRADIDO_NODE_SERVER_HOME_FOLDER
+  try {
+    fs.accessSync(folder, fs.constants.R_OK | fs.constants.W_OK)
+  } catch (err) {
+    logger.error(`Error: home folder for DLT Gradido Node Server ${folder} does not exist`)
+    return
+  }
+
+  const dbComs = await getReachableCommunities(CONFIG.FEDERATION_VALIDATE_COMMUNITY_TIMER * 4)
+  const communitiesForDltNodeServer: CommunityForDltNodeServer[] = []
+  // make sure communityName is unique
+  const communityName = new Set<string>()  
+  dbComs.forEach((com) => {
+    if (!com.communityUuid || !com.hieroTopicId) {
+      return
+    }
+    let alias = com.name
+    if (!alias || communityName.has(alias)) {
+      alias = com.communityUuid
+    }
+    communityName.add(alias)
+    communitiesForDltNodeServer.push({
+      communityId: com.communityUuid,
+      hieroTopicId: com.hieroTopicId,
+      alias,
+      // use only alpha-numeric chars for folder name
+      folder: alias.replace(/[^a-zA-Z0-9]/g, '_')
+    })
+  })
+  const dltNodeServerCommunitiesFile = path.join(folder, 'communities.json')
+  fs.writeFileSync(dltNodeServerCommunitiesFile, JSON.stringify(communitiesForDltNodeServer, null, 2))
+  logger.debug(`Written communitiesForDltNodeServer to ${dltNodeServerCommunitiesFile}`)
+}

deployment/bare_metal/.env.dist

@@ -88,6 +88,7 @@ GDT_ACTIVE=false
 # DLT-Connector (still in develop)
 DLT_CONNECTOR=false
 DLT_CONNECTOR_PORT=6010
+DLT_GRADIDO_NODE_SERVER_HOME_FOLDER=/home/gradido/.gradido
 
 # used for combining a newsletter on klicktipp with this gradido community
 # if used, user will be subscribed on register and can unsubscribe in his account

federation/src/graphql/api/1_0/model/GetPublicCommunityInfoResult.ts

@@ -12,6 +12,7 @@ export class GetPublicCommunityInfoResult {
     this.name = dbCom.name
     this.description = dbCom.description
     this.creationDate = dbCom.creationDate
+    this.hieroTopicId = dbCom.hieroTopicId
   }
 
   @Field(() => String)
@@ -28,4 +29,7 @@ export class GetPublicCommunityInfoResult {
 
   @Field(() => String)
   publicJwtKey: string
+
+  @Field(() => String)
+  hieroTopicId: string | null
 }