Page Comparison

//// When using this script in the script console uncomment the next line:
def issueKey = 'ISSUE-1'
//// When using this script in a transition uncomment the next line:
// def issueKey = issue.key

String formName = "Form Name"
def fieldNames = ["Field One", "Field Two"]
def fieldDestination = "Field Destination"

Closure getFormIds = { def propertyValue, String name ->
    def ids = []
    for(def form : propertyValue.value.forms){
	    if(form.name.equals(name)){
	        ids.add(form.id)
	    }
	}
    return ids
}

Closure<String> getFieldId = { def property, String fieldName ->
    for (def question : property.value.design.questions){
        if(fieldName.equals(question.value.label)){
            return question.key
        }
    }
}

Closure<String> getFieldValue = { def property, String fieldName ->
    for (def answer : property.value.state.answers){
        String fieldId = getFieldId(property, fieldName)
        if(answer.key.equals(fieldId)){
            return answer.value.text
        }
    }
}

def proFormaForm = get('/rest/api/3/issue/' + issueKey + '/properties/proforma.forms')
    .header('Content-Type', 'application/json')
    .asObject(Map)

if(proFormaForm.status == 200){
    def forms = getFormIds(proFormaForm.body, formName)
    for(def formId : forms){
        def property = get('/rest/api/3/issue/' + issueKey + '/properties/proforma.forms.i' + formId)
                .header('Content-Type', 'application/json')
                .asObject(Map)
        if(property.status == 200){
            if(property.body.value.schemaVersion.equals(8)){
                Double result = 0
                for(def fieldName : fieldNames) {
                    String fieldValue = getFieldValue(property.body, fieldName)
                    if(fieldValue){
                          result = result + fieldValue.toDouble()
                    }
        		    }
                def fieldDestinationId = getFieldId(property.body, fieldDestination).toString()
                boolean answerExists = false
        		    for(def answer : property.body.value.state.answers){
        		        if(answer.key.equals(fieldDestinationId)){
        		            answer.value.text = result.toString()
        		            answerExists = true
        		        }
        		    }
        		    if(!answerExists){
        		        property.body.value.state.answers.put(fieldDestinationId.toString(), ["text" : result.toString()])
        		    }
        		    def insertProperty = put('/rest/api/3/issue/' + issueKey + '/properties/' + property.body.key)
                                  .header('Content-Type', 'application/json')
                                  .body(property.body.value)
                                  .asString()
            }
        }
    }
}