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<apex:page standardController="Contact" extensions="ContactMassSendSurveyController" recordSetVar="contacts" showHeader="false" standardStylesheets="false">

    <apex:slds />  
    
    <!-- styles and js libraries for date picker -->
    <apex:stylesheet value="{!URLFOR($Resource.DateTimePicker, 'src/css/bootstrap.css')}"/>     
    <apex:stylesheet value="{!URLFOR($Resource.DateTimePicker, 'src/css/bootstrap-datetimepicker.css')}"/>
    
    <apex:includeScript value="{!URLFOR($Resource.DateTimePicker, 'src/js/jquery-3.2.1.min.js')}"/> 
    <apex:includeScript value="{!URLFOR($Resource.DateTimePicker, 'src/js/bootstrap.js')}"/>
    <apex:includeScript value="{!URLFOR($Resource.DateTimePicker, 'src/js/moment.js')}"/>
    <apex:includeScript value="{!URLFOR($Resource.DateTimePicker, 'src/js/moment-with-locales.js')}"/>
    <apex:includeScript value="{!URLFOR($Resource.DateTimePicker, 'src/js/bootstrap-datetimepicker.js')}"/> 
    <!-- end -->
    
    <apex:form styleClass="slds-p-around--medium"> 
    <script type="text/javascript">
        
    // submitForm() is called with the button at the bottom of the page
    function submitForm() {
        sendSurvey(
            document.getElementById("selectedSurvey").options[document.getElementById("selectedSurvey").selectedIndex].value,            
            document.getElementById("sendDateTime").value

        );
    }
    // makes it so users can't type in the sendDateTime input, they need to use the picker. 
    $(function () {
        $('#datetimepicker').datetimepicker({ignoreReadonly : true});
    });                    
    </script>   
    
    <apex:actionFunction name="sendSurvey" action="{!sendSurveys}" reRender="">
        <apex:param name="selectedSurvey" value=""/>
        <apex:param name="sendDateTime" value=""/>
    </apex:actionFunction>   

    <div class="slds-scope">
        <div class="slds-grid slds-wrap slds-size_3-of-7">
            <main class="slds-col slds-size--1-of-1 slds-small-size--1-of-2 slds-medium-size--8-of-12 slds-large-size--4-of-5">        
    
                    <div class="slds-form-element">
                        <label class="slds-form-element__label" for="select-01">Select A Survey</label>
                        <div class="slds-form-element__control">
                            <div class="slds-select_container">        
                                <select id="selectedSurvey" class="slds-select">
                                    <apex:repeat value="{!surveys}" var="survey">
                                        <option value="{!survey.value}">{!survey.label}</option>
                                    </apex:repeat>
                                </select>   
                            </div>
                        </div>
                    </div>   
                	<br />
                    <div class='slds-form-element'>
                        <label class="slds-form-element__label" for="select-01">Select Date/Time</label> 
                        <div class='input-group date' id='datetimepicker'>
                            <input id="sendDateTime" 
                                   type='text' 
                                   class="form-control" 
                                   readonly="true"

                            />
                            <span class="input-group-addon">
                                <span class="glyphicon glyphicon-calendar"></span>
                            </span>
                        </div>
                    </div>
                
                <button onclick="submitForm(); return false;">Send Survey</button>
            </main>
        </div>
    </div>
</apex:form>    
</apex:page>

/***********************************
Touchpoint Solutions
author: Tyler Zika
link: http://www.touchpointcrm.com
email: support@touchpointcrm.com
date: 07/03/17
description: get picklist values 
***********************************/
public with sharing class ContactMassSendSurveyController 
{    
    private ApexPages.StandardSetController standardSetController;
    
    // constructor.
    public ContactMassSendSurveyController(ApexPages.StandardSetController standardSetController)
    {
        this.standardSetController = standardSetController;

    }
    
    // get a list of surveys for the form picklist
    public List<SelectOption> getSurveys() {
        List<SelectOption> surveys = new List<SelectOption>();
        for (SEO__CSEO_Survey__c s : [SELECT Id, Name FROM SEO__CSEO_Survey__c])
        {
            surveys.add(new SelectOption(s.Id , s.Name));
        }
        
        return surveys;
    } 
    
    public PageReference sendSurveys()
    {       
        
		List<Contact> selectedContacts = (List<Contact>) standardSetController.getSelected();
        
        String selectedSurvey = Apexpages.currentPage().getParameters().get('selectedSurvey');
        DateTime sendDateTime = DateTime.parse(Apexpages.currentPage().getParameters().get('sendDateTime'));
       
        
        // an empty list to add records to
        List<SEO__Survey_Sent__c> surveysToSend = new List<SEO__Survey_Sent__c>();
        
        for(Contact c : selectedContacts) {
            SEO__Survey_Sent__c s        = new SEO__Survey_Sent__c ();
            s.SEO__Contact__c            = c.Id;
            s.SEO__Survey__c             = selectedSurvey;
            s.SEO__Cust_Survey_Email__c	 = [SELECT Email FROM Contact WHERE Id =: c.Id].Email;
            s.SEO__Survey_Sent__c        = sendDateTime;
            surveysToSend.add(s);
        }
        
        insert surveysToSend;
        return standardSetController.cancel();   
    }
      
}

@isTest
public class ContactMassSendSurveyControllerTest {
    static testMethod void massSendSurvey(){
        //Create Test Data
        
        Contact c = new Contact(FirstName='John', LastName='Doe', Email='john@doe.email');
        insert c;

		SEO__CSEO_Survey__c survey = new SEO__CSEO_Survey__c(Name = 'Test Survey');
        
        insert survey;
        
    	Test.startTest();
        // load the page       
        PageReference pageRef = Page.ContactMassSendSurvey;
        pageRef.getParameters().put('selectedSurvey', survey.Id);
        pageRef.getParameters().put('sendDateTime', '01/01/2001 7:32 PM');
        Test.setCurrentPageReference(pageRef);
        
        // load the extension
        ContactMassSendSurveyController controller = new ContactMassSendSurveyController(new ApexPages.StandardSetController([SELECT Id FROM Contact]));

        controller.getSurveys();
        controller.sendSurveys();
        
        Test.stopTest();


    }
}