Transform trackedEntityAttributes

exampleOutputWithoutTransform.js

{ 'TB number': 
   { displayName: 'TB number',
     valueType: 'TEXT',
     attribute: 'ruQQnf6rswq',
     value: '1Z 1F2 A84 59 4464 173 6' },
  Gender: 
   { displayName: 'Gender',
     valueType: 'TEXT',
     attribute: 'cejWyOfXge6',
     value: 'Male' },
  'Last name': 
   { displayName: 'Last name',
     valueType: 'TEXT',
     attribute: 'zDhUuAYrxNC',
     value: 'Doe' },
  'First name': 
   { code: 'MMD_PER_NAM',
     displayName: 'First name',
     valueType: 'TEXT',
     attribute: 'w75KJ2mc4zz',
     value: 'John' },
  Address: 
   { code: 'MMD_PER_ADR1',
     displayName: 'Address',
     valueType: 'TEXT',
     attribute: 'VqEFza8wbwA',
     value: 'Main street 2' },
  'National identifier': 
   { code: 'National identifier',
     displayName: 'National identifier',
     valueType: 'TEXT',
     attribute: 'AuPLng5hLbE',
     value: '245435245' } }

exampleOutputWithTransform.js

{ tbNumber: 
   { displayName: 'TB number',
     valueType: 'TEXT',
     attribute: 'ruQQnf6rswq',
     value: '1Z 1F2 A84 59 4464 173 6' },
  gender: 
   { displayName: 'Gender',
     valueType: 'TEXT',
     attribute: 'cejWyOfXge6',
     value: 'Male' },
  lastName: 
   { displayName: 'Last name',
     valueType: 'TEXT',
     attribute: 'zDhUuAYrxNC',
     value: 'Doe' },
  firstName: 
   { code: 'MMD_PER_NAM',
     displayName: 'First name',
     valueType: 'TEXT',
     attribute: 'w75KJ2mc4zz',
     value: 'John' },
  address: 
   { code: 'MMD_PER_ADR1',
     displayName: 'Address',
     valueType: 'TEXT',
     attribute: 'VqEFza8wbwA',
     value: 'Main street 2' },
  nationalIdentifier: 
   { code: 'National identifier',
     displayName: 'National identifier',
     valueType: 'TEXT',
     attribute: 'AuPLng5hLbE',
     value: '245435245' } }

transformAttributes.js

// Use as follows:
// Pass the attributes list into the function (optionally pass paramater to disable name transforms)
//
// var transformedAttributes = transformAttributes(trackedEntityInstance.attributes); 
// This call will return you an object that has the displayName as a camel cased object map.
//
// var transformedAttributes = transformAttributes(trackedEntityInstance.attributes); 
// This call will return you an object that has the displayName as a camel cased object map. Which means you can use dot
// notation to access them. Getting the value would be: transformedAttributes.firstName.value
//
// var transformedAttributes = transformAttributes(trackedEntityInstance.attributes, true); 
// This call will return you an object that has the displayName as it originally was. This means you can NOT use dot notation
//to access them. Getting the value would be: transformedAttributes['First name'].value

function transformAttributes(attributes, noNameTransform) {
    if (!Array.isArray(attributes)) {
        throw new Error('Passed attributes must be in form of an array');
    }

    function transformName(name) {
        return name.toLowerCase().replace(/\W([a-z])/g, function (matches) { return matches[1].toUpperCase() });
    }

    return attributes
        .filter(function (value) {
            if (value && (typeof value.displayName === 'string')) {
                return true;
            }
            return false;
        })
        .map(function (value) {
            var propertyName = noNameTransform ? value.displayName : transformName(value.displayName);

            return [propertyName, value];
        })
        .reduce(function (acc, value) {
            acc[value[0]] = value[1];

            return acc;
        }, {});
}