rules.json

[
    {
        "required" : {
            "categoryName" : ["Shifting"]
        },
        "message" : "You must have at least one shifter."
    },
    {
        "required" : {
            "categoryName" : ["Battery"]
        },
        "message" : "You must have at least one battery."
    },
    {
        "required" : {
            "categoryName" : ["Junction-A"]
        },
        "message" : "You must have at least one Junction-A."
    },
    {  
        "contains" : {
            "name" : ["External Battery"]
        },
        "required" : {
            "categoryName" : ["Battery Mount"]
        },
        "message" : "An external battery requires a battery mount."
    },
    {
        "contains" : {
            "modelNo" :["SM-EW67-A-E"]
        },
        "required" : {
            "modelNo" : ["SM-BTR1"]
        },
        "message" : "The SM-EW67-A-E requires an external battery."
    },
    {
        "contains" : {
            "modelNo" : ["RD-RX817"]
        },
        "prohibited" : {
            "categoryName" : ["Front Derailleur"]
        },
        "message" : "The RX-817 Rear Derailleur cannot be used with a front derailleur. Either swap it for for the RX-815 or remove your front derailleur."
    },
    {
        "contains" : {
            "modelNo" : ["SW-R610"]
        },
        "required" : {
            "modelNo" : [
                "ST-6871",
                "ST-9070",
                "ST-R8050",
                "ST-R9150"
            ]
        },
        "message" : "Sprint shifters require either ST-6870, ST-9070, ST-R8050 or ST-R9150."
    },
    {
        "contains" : {
            "modelNo" : [
                "EW-WU101",
                "EW-WU111"
            ]
        },
        "required" : {
            "modelNo" : [
                "BT-DN110-A",
                "BM-DN110"
            ]
        },
        "message" : "Newer wireless units require newer batteries."
    },
    {
        "contains" : {
            "modelNo" : [
                "FD-6770"
            ]
        },
        "prohibited" : {
            "modelNo" : [
                "RD-RX817",
                "RD-RX815",
                "RD-6870",
                "RD-9070",
                "RD-RX805",
                "RD-R8050",
                "RD-R9150"
            ]
        },
        "message" : "You cannot use a ten speed front derailleur with an eleven speed rear derailleur."
    },
    {
        "contains" : {
            "modelNo" : [
                "RD-6770"
            ]
        },
        "prohibited" : {
            "modelNo" : [
                "FD-RX815",
                "FD-6870",
                "FD-9070",
                "FD-RX805",
                "FD-R8050",
                "FD-R9150"
            ]
        },
        "message" : "You cannot use a ten speed rear derailleur with an eleven speed front derailleur."
    }
]