[
    {
        "id": "history-reader-example",
        "type": "tab",
        "label": "Kafka History Reader Example",
        "disabled": false,
        "info": "Example flow showing how to use the Kafka History Reader node"
    },
    {
        "id": "inject-trigger",
        "type": "inject",
        "z": "history-reader-example",
        "name": "Trigger History Read",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "messageTypes",
                "v": "sensor-data,device-status,alert",
                "vt": "str"
            },
            {
                "p": "maxMessages",
                "v": "5",
                "vt": "num"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "{}",
        "payloadType": "json",
        "x": 160,
        "y": 100,
        "wires": [
            [
                "history-reader"
            ]
        ]
    },
    {
        "id": "history-reader",
        "type": "hm-kafka-history-reader",
        "z": "history-reader-example",
        "name": "Read IoT History",
        "broker": "kafka-broker-config",
        "topic": "iot-messages",
        "messageTypes": "sensor-data,device-status",
        "maxMessages": 10,
        "fromOffset": "earliest",
        "encoding": "utf8",
        "useSchemaValidation": false,
        "registryUrl": "http://localhost:8081",
        "useRegistryAuth": false,
        "registryUsername": "",
        "registryPassword": "",
        "x": 370,
        "y": 100,
        "wires": [
            [
                "process-history"
            ]
        ]
    },
    {
        "id": "process-history",
        "type": "function",
        "z": "history-reader-example",
        "name": "Process Historical Data",
        "func": "// Extract historical messages from the response\nconst historicalMessages = msg.payload.historicalMessages;\nconst summary = msg.payload.summary;\n\nnode.status({text: `Found ${summary.totalMessages} messages of ${summary.totalTypes} types`});\n\n// Process each message type\nfor (const [messageType, messages] of Object.entries(historicalMessages)) {\n    node.warn(`Processing ${messages.length} messages of type: ${messageType}`);\n    \n    for (const message of messages) {\n        // Send each historical message with metadata\n        const outputMsg = {\n            payload: message.payload,\n            topic: message.topic,\n            messageType: message.messageType,\n            isHistorical: true,\n            timestamp: new Date(parseInt(message.timestamp)),\n            offset: message.offset,\n            partition: message.partition\n        };\n        \n        // Send to different outputs based on message type\n        if (messageType === 'sensor-data') {\n            node.send([outputMsg, null, null]);\n        } else if (messageType === 'device-status') {\n            node.send([null, outputMsg, null]);\n        } else {\n            node.send([null, null, outputMsg]);\n        }\n    }\n}\n\n// Send summary information\nconst summaryMsg = {\n    payload: {\n        summary: summary,\n        request: msg.payload.request\n    },\n    topic: 'history-summary'\n};\n\nnode.send([null, null, summaryMsg]);\n\nreturn null;",
        "outputs": 3,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 580,
        "y": 100,
        "wires": [
            [
                "sensor-debug"
            ],
            [
                "status-debug"
            ],
            [
                "summary-debug"
            ]
        ]
    },
    {
        "id": "sensor-debug",
        "type": "debug",
        "z": "history-reader-example",
        "name": "Sensor Data",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 790,
        "y": 60,
        "wires": []
    },
    {
        "id": "status-debug",
        "type": "debug",
        "z": "history-reader-example",
        "name": "Device Status",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 790,
        "y": 100,
        "wires": []
    },
    {
        "id": "summary-debug",
        "type": "debug",
        "z": "history-reader-example",
        "name": "Summary Info",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 790,
        "y": 140,
        "wires": []
    },
    {
        "id": "inject-realtime-start",
        "type": "inject",
        "z": "history-reader-example",
        "name": "Start Real-time Consumer",
        "props": [
            {
                "p": "payload"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "{\"action\":\"start\"}",
        "payloadType": "json",
        "x": 180,
        "y": 200,
        "wires": [
            [
                "realtime-consumer"
            ]
        ]
    },
    {
        "id": "realtime-consumer",
        "type": "hm-kafka-consumer",
        "z": "history-reader-example",
        "name": "Real-time IoT Consumer",
        "broker": "kafka-broker-config",
        "topic": "iot-messages",
        "groupId": "nodered-realtime-group",
        "autoCommit": true,
        "autoCommitIntervalMs": 5000,
        "fromBeginning": false,
        "encoding": "utf8",
        "useSchemaValidation": false,
        "registryUrl": "http://localhost:8081",
        "useRegistryAuth": false,
        "registryUsername": "",
        "registryPassword": "",
        "x": 410,
        "y": 200,
        "wires": [
            [
                "realtime-process"
            ]
        ]
    },
    {
        "id": "realtime-process",
        "type": "function",
        "z": "history-reader-example",
        "name": "Process Real-time",
        "func": "// Add timestamp and mark as real-time\nmsg.isHistorical = false;\nmsg.receivedAt = new Date();\n\nnode.status({text: `Real-time: ${msg.payload.type || 'unknown'}`});\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 620,
        "y": 200,
        "wires": [
            [
                "realtime-debug"
            ]
        ]
    },
    {
        "id": "realtime-debug",
        "type": "debug",
        "z": "history-reader-example",
        "name": "Real-time Messages",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "true",
        "targetType": "full",
        "statusVal": "",
        "statusType": "auto",
        "x": 810,
        "y": 200,
        "wires": []
    },
    {
        "id": "kafka-broker-config",
        "type": "hm-kafka-broker",
        "name": "Local Kafka",
        "hosts": "localhost:9092",
        "clientId": "node-red-client",
        "connectTimeout": 10000,
        "requestTimeout": 30000,
        "autoConnect": true,
        "idleConnection": 5,
        "reconnectDelay": 10,
        "maxReconnectDelay": 30,
        "usetls": false,
        "useCredentials": false
    }
]