database.rules.json

{
  "rules": {
    "users": {
      "$uid": {
        ".read": "$uid === auth.uid",
        ".write": "$uid === auth.uid",
        "profile": {
          ".validate": "newData.hasChildren(['username', 'email', 'subscriptionType'])",
          "username": {
            ".validate": "newData.isString() && newData.val().length > 0"
          },
          "email": {
            ".validate": "newData.isString() && newData.val().length > 0"
          },
          "subscriptionType": {
            ".validate": "newData.isString() && (newData.val() === 'free' || newData.val() === 'pro')"
          }
        },
        "vehicles": {
          "$vehicleId": {
            ".validate": "newData.hasChildren(['year', 'make', 'model', 'engineDisplacement', 'fuelType', 'drivetrain', 'bodyStyle', 'mileage'])",
            "year": {
              ".validate": "newData.isNumber()"
            },
            "make": {
              ".validate": "newData.isString() && newData.val().length > 0"
            },
            "model": {
              ".validate": "newData.isString() && newData.val().length > 0"
            },
            "engineDisplacement": {
              ".validate": "newData.isString() && newData.val().length > 0"
            },
            "fuelType": {
              ".validate": "newData.isString() && newData.val().length > 0"
            },
            "drivetrain": {
              ".validate": "newData.isString() && newData.val().length > 0"
            },
            "bodyStyle": {
              ".validate": "newData.isString() && newData.val().length > 0"
            },
            "mileage": {
              ".validate": "newData.isNumber()"
            }
          }
        },
        "dtcs": {
          "$dtcId": {
            ".validate": "newData.hasChildren(['code', 'theoryOfOperation'])",
            "code": {
              ".validate": "newData.isString() && newData.val().length > 0"
            },
            "theoryOfOperation": {
              ".validate": "newData.isString() && newData.val().length > 0"
            }
          }
        },
        "queryPacks": {
          "$queryPackId": {
            ".validate": "newData.hasChildren(['name', 'queriesRemaining'])",
            "name": {
              ".validate": "newData.isString() && newData.val().length > 0"
            },
            "queriesRemaining": {
              ".validate": "newData.isNumber()"
            }
          }
        }
      }
    }
  }
}