NSOA: Update project.budget_time using budget transactions

updateProjectBudgetHours.js

/**
 * Update the project total budget hours using
 * the hours field on project budget transactions.
 *
 * Version    Date            Author           Remarks
 * 1.00       20 Feb 2014     Ryan Morrissey
 *
 */

function updateProjectBudgetHours(type) {
    try {
        // DEBUG: Uncomment next line to enable XML logging
        // var wsLog = NSOA.wsapi.enableLog(true);

        // list all fields used in script
        var FLD_PRJ_ID = 'id',
            FLD_PRJ_BUD_HRS = 'budget_time',
            FLD_BUD_PID = 'projectid';

        // store newly saved budget record
        var updBudget = NSOA.form.getNewRecord();

        // create new budget object to store information
        var budRec = new NSOA.record.oaBudget();
        budRec.projectid = updBudget.projectid;

        var budRequest = {
            type   : "Budget",
            method : "equal to",
            fields : "id,budget_hours__c",  // budget_hours__c is a custom hours field
            attributes : [
               {
                    name : "limit",
                    value : "100"
                }
            ],
            objects : [budRec]
        };

        // disable the current user's filter set while script runs
        NSOA.wsapi.disableFilterSet(true);

        // search for all budget transactions with current projectid
        var budResults = NSOA.wsapi.read(budRequest);

        if (!budResults || !budResults[0]) {
            NSOA.meta.log('error', 'Unexpected error! Could not return project budgets.');
            return;
        } else if (budResults[0].errors !== null && budResults[0].errors.length > 0) {
            prjResults[0].errors.forEach(function(err) {
                var fullError = err.code + ' - ' + err.comment + ' ' + error.text;
                NSOA.meta.log('error', 'Error: ' + fullError);
            });
            return;
        }

        var b,
            totalBudHrs = 0,
            budObj = budResults[0].objects,
            budObjLen = budObj.length;

        for (b = 0; b < budObjLen; b++) {
            var budHrs = parseInt(budObj[b].budget_hours__c, 10);
            totalBudHrs += budHrs;  // add all hours together
        }

        // create new project object to store information
        var prjRec = new NSOA.record.oaProject();
        prjRec[FLD_PRJ_ID] = updBudget[FLD_BUD_PID];
        prjRec[FLD_PRJ_BUD_HRS] = totalBudHrs;

        // disable the current user's filter set while script runs
        NSOA.wsapi.disableFilterSet(true);

        // update the project budget
        var prjResults = NSOA.wsapi.modify(
            [],
            [prjRec]
        );

        if (!prjResults || !prjResults[0]) {
            NSOA.meta.log('error', 'Unexpected error! Project was not updated.');
        } else if (prjResults[0].errors !== null && prjResults[0].errors.length > 0) {
            prjResults[0].errors.forEach(function(err) {
                var fullError = err.code + ' - ' + err.comment + ' ' + error.text;
                NSOA.meta.log('error', 'Error: ' + fullError);
            });
            return;
        }

    } catch(e) {
        NSOA.meta.log('error', 'Try/catch error: ' + e);
    }
}