{
    "name": "RollbackLoop",
    "properties": {
        "activities": [
            {
                "name": "Forward-each",
                "type": "ForEach",
                "dependsOn": [],
                "userProperties": [],
                "typeProperties": {
                    "items": {
                        "value": "@pipeline().parameters.Input",
                        "type": "Expression"
                    },
                    "activities": [
                        {
                            "name": "Attempt Change",
                            "type": "SetVariable",
                            "dependsOn": [],
                            "userProperties": [],
                            "typeProperties": {
                                "variableName": "status",
                                "value": {
                                    "value": "@if(contains(item(),'true'),true,item())",
                                    "type": "Expression"
                                }
                            }
                        },
                        {
                            "name": "Track Successes",
                            "type": "AppendVariable",
                            "dependsOn": [
                                {
                                    "activity": "Attempt Change",
                                    "dependencyConditions": [
                                        "Succeeded"
                                    ]
                                }
                            ],
                            "userProperties": [],
                            "typeProperties": {
                                "variableName": "Finished_values",
                                "value": "@item()"
                            }
                        }
                    ]
                }
            },
            {
                "name": "Roll-back each",
                "type": "ForEach",
                "dependsOn": [
                    {
                        "activity": "Forward-each",
                        "dependencyConditions": [
                            "Failed"
                        ]
                    }
                ],
                "userProperties": [],
                "typeProperties": {
                    "items": {
                        "value": "@variables('Finished_values')",
                        "type": "Expression"
                    },
                    "activities": [
                        {
                            "name": "Do Rollback on Item",
                            "type": "SetVariable",
                            "dependsOn": [],
                            "userProperties": [],
                            "typeProperties": {
                                "variableName": "Undoin",
                                "value": "@item()"
                            }
                        }
                    ]
                }
            },
            {
                "name": "Only on success",
                "type": "Wait",
                "dependsOn": [
                    {
                        "activity": "Forward-each",
                        "dependencyConditions": [
                            "Succeeded"
                        ]
                    }
                ],
                "userProperties": [],
                "typeProperties": {
                    "waitTimeInSeconds": 1
                }
            }
        ],
        "parameters": {
            "Input": {
                "type": "array",
                "defaultValue": [
                    "1true",
                    "2true",
                    "3false",
                    "4true"
                ]
            }
        },
        "variables": {
            "Finished_values": {
                "type": "Array"
            },
            "status": {
                "type": "Boolean"
            },
            "Undoin": {
                "type": "String"
            }
        },
        "annotations": []
    }
}