What is jolt conversion spec for the given input and output

[rachanamamillapalli]

Input:

{
  "primary": {
    "domainAttributes": {
      "email": "rach@gmail.com",
      "name": "rach",
      "age": "28"
    },
    "meta": {
      "isEntity": true
    },
    "type": "somevalue",
    "purchases": [
      {
        "domainAttributes": {
          "email": "rach@gmail.com",
          "id": "1",
          "age": "28"
        },
        "type": "somevalue",
        "purchaseValue": [
          {
            "domainAttributes": {
              "email": "rach@gmail.com",
              "name": "rach",
              "id": "1",
              "value": "5",
              "applicableOn": "CLOTHES"
            },
            "meta": null,
            "type": "some other value"
          }
        ]
      },
      {
        "domainAttributes": {
          "email": "rach@gmail.com",
          "id": "2",
          "age": "28"
        },
        "type": "somevalue",
        "purchaseValue": [
          {
            "domainAttributes": {
              "email": "rach@gmail.com",
              "name": "rach",
              "id": "2",
              "value": "7",
              "applicableOn": "BAGS"
            },
            "type": "some other value"
          }
        ]
      }
    ]
  }
}

Output:

{
  "email" : "rach@gmail.com",
  "name" : "rach",
  "age" : "28",
  "purchaseSum" : [{"sum":"5", "applicableOn": "CLOTHES"}, {"sum": "7", "applicableOn": "BAGS"}],
  "purchase" : [ {
    "value" : "5",
    "id" : "1",
    "applicableOn" : "CLOTHES"
  }, {
    "value" : "7",
    "id" : "2",
    "applicableOn" : "BAGS"
  } ]
}

I have this spec currently but it calculates the sum of all values in purchaseValues without checking applicableType and also the format of purchase is slightly different than expected:

[
    {
      "operation": "shift",
      "spec": {
        "primary": {
          "domainAttributes": {
            "email": "email",
            "name": "name",
            "age": "age"
          },
          "purchases": {
            "*": {
              "purchaseValue": {
                "*": {
                  "domainAttributes": {
                    "value": "purchases[].value",
                    "id": "purchases[].id",
                    "applicableOn": "purchases[].applicableOn"
                  }
                }
              }
            }
          }
        }
      }
    },
    {
      "operation": "shift",
      "spec": {
        "email": "email",
        "name": "name",
        "age": "age",
        "purchases": {
          "*": {
            "value": "purchaseSum[]",
            "@": "purchase[]"
          }
        }
      }
    },
    {
      "operation": "modify-overwrite-beta",
      "spec": {
        "purchaseSum": "=intSum(@(1,purchaseSum))"
      }
    },
    {
      "operation": "shift",
      "spec": {
        "email": "email",
        "name": "name",
        "age": "age",
        "purchaseSum": "purchaseSum",
        "purchase": "purchase"
      }
    }
  ]

The current output I'm seeing with the above spec is:

{
  "email" : "rach@gmail.com",
  "name" : "rach",
  "age" : "28",
  "purchaseSum" : 12,
  "purchase" : [ {
    "value" : "5"
  }, {
    "id" : "1"
  }, {
    "applicableOn" : "CLOTHES"
  }, {
    "value" : "7"
  }, {
    "id" : "2"
  }, {
    "applicableOn" : "BAGS"
  } ]
}