Sum of timespent on a custom field

[Robi Anton]

Hello, 

On my workflow, I have a field that contains the time spent on an issue. 

My main idea is to make a report of sum of time spent each month from all the issues.

I can get these informations (time spent, time remaining) from agregate functions or by exporting by Excel file, but I want to show these details on a gadget in a Dashboard. 
I don't know how to develop a gadget and it seems to be difficult.

I have an another idea.
When we close the issue, call a groovy script that:

1. Get the value of a custom field containing the time spent on this issue
2. Get the value of a custom field containing the total time spent for the current month
3. Add time spent to total time spent
4. Update the custom field total time spent

Could someone help me please? 

Thanks

[Robi Anton]

import org.apache.log4j.Category
import com.atlassian.jira.bc.issue.search.SearchService
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.search.SearchException
import com.atlassian.jira.web.bean.PagerFilter
import com.atlassian.jira.issue.util.IssueChangeHolder
import com.atlassian.jira.issue.util.DefaultIssueChangeHolder;
import com.atlassian.jira.issue.ModifiedValue
import com.atlassian.jira.issue.CustomFieldManager
import com.atlassian.jira.ComponentManager;
import com.atlassian.jira.issue.fields.CustomField
import com.atlassian.jira.issue.customfields.manager.OptionsManager
import com.atlassian.jira.issue.customfields.option.Option
import com.atlassian.jira.issue.*;
import java.sql.Timestamp
Calendar localCalendar = Calendar.getInstance(TimeZone.getDefault());
int currentDay = localCalendar.get(Calendar.DATE);
println currentDay

if ( currentDay == 18 ){
println "WE ARE IN CURRENT DAY _script Somme Precedent"
def jqlSearch = "project = 'AISC - Suivi des demandes' and status was in (Validation) and ('Date de livraison' >= startOfMonth(-1) and 'Date de livraison' <=endOfMonth(-1))"
def userManager = ComponentAccessor.getUserManager()
def issueManager = ComponentAccessor.getIssueManager()
def searchService = ComponentAccessor.getComponentOfType(SearchService)
def user = userManager.getUserByName("yk3520").directoryUser
SearchService.ParseResult parseResult = searchService.parseQuery(user, jqlSearch)

def value = 0
def customFieldManager = ComponentAccessor.getCustomFieldManager()
def myCustomField = customFieldManager.getCustomFieldObjectByName("Temps d'intervention")

if (parseResult.isValid()) {
try {
def results = searchService.search(user, parseResult.getQuery(), PagerFilter.getUnlimitedFilter())
def issues = results.getIssues()
issues.each {
if (it.getCustomFieldValue(myCustomField))
value += it.getCustomFieldValue(myCustomField).toInteger()
}
} catch (SearchException e) {
e.printStackTrace()
}
} else {
log.warn("Invalid query")
return null
}

// Save the value at custom field with name A number custom field of issue with key TEST-1
def targetIssue = issueManager.getIssueByCurrentKey("SL-8")
def customField = customFieldManager.getCustomFieldObjects(targetIssue).find {it.name == "Total intervention M-1"}
if (customField) {
    def changeHolder = new DefaultIssueChangeHolder()
    customField.updateValue(null, targetIssue,
            new ModifiedValue(targetIssue.getCustomFieldValue(customField), value.toString()),changeHolder)
    log.debug "Custom field $customField.name} updated with value ${value}"
    return
}
log.warn "Custom field ${customField?.name} was not updated"

}
else
{
println "WE ARE NOT IN CURRENT DAY"
}