/*** LibraryRecordTypePage.cmp *****/
<aura:component implements ="flexipage:availableForAllPageTypes" access="global" controller="LibraryRecordTypePageController">
    <aura:attribute name="libraryRecordTypeId" type="String" default="" />
    <aura:attribute name="recordTypeOptions" type="map" default="" />
    <aura:attribute name="recordId" type="String" default="" />
    <aura:attribute name="isRecordTypeSelected" type="Boolean" default="false" />
    <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>
    <lightning:layout class="slds-m-left_small slds-size--1-of-2">
        <lightning:layoutItem flexibility="grow" size="8">
            <lightning:select label="" value="{!v.libraryRecordTypeId}" aura:id="recordTypeSelection" onchange="{!c.selectedRecordType}">
                <aura:iteration items="{!v.recordTypeOptions}" indexVar="key" var="recordType">
                    <option value="{!recordType.key}">{!recordType.value}</option>
                </aura:iteration>
            </lightning:select>
        </lightning:layoutItem>
    </lightning:layout>
    <aura:if isTrue="{!v.isRecordTypeSelected}">
        <lightning:layout>
            <lightning:layoutItem>
                
                <lightning:recordForm recordId="{!v.recordId}"
                                      objectApiName="Library_Items__c"
                                      layoutType="Full"
                                      mode="view"
                                      columns="2"/>
            </lightning:layoutItem>
        </lightning:layout>
    </aura:if>   
</aura:component>

/**** LibraryRecordTypePageController.js ****/
({
	doInit : function(component, event, helper) {
		var getRecordTypeNameAction = component.get("c.getRecordTypeName");
        getRecordTypeNameAction.setCallback(this,function(response){
            var state = response.getState();
            if(state === 'SUCCESS') {
                var recordTypeOpts = [];
                var recordTypes = response.getReturnValue();                
                for (var key in recordTypes) {
                    recordTypeOpts.push({value:recordTypes[key], key:key});
                }                
                component.set("v.recordTypeOptions", recordTypeOpts);
            }
        });        
        $A.enqueueAction(getRecordTypeNameAction);	
	},
    selectedRecordType : function(component) {
        component.set("v.isRecordTypeSelected", true);
        var libraryRecType = component.get("v.libraryRecordTypeId");
        var getLibraryItemAction = component.get("c.getLibraryItem");
        getLibraryItemAction.setParams({"libraryRecTypeId": libraryRecType});
        getLibraryItemAction.setCallback(this,function(response){
            var state = response.getState();
            if(state === 'SUCCESS') {
                var libraryItemList = response.getReturnValue();
                var recordId = '';
                for(var i=0; i< libraryItemList.length; i++) {
                    recordId = libraryItemList[i].Id;
                } 
                component.set("v.recordId", recordId);
                /*for (var key in recordTypes) {
                    recordTypeOpts.push({value:recordTypes[key], key:key});
                }                
                component.set("v.recordTypeOptions", recordTypeOpts);*/
            }
        });
        $A.enqueueAction(getLibraryItemAction);
    }
})

/*** LibraryRecordTypePageController ***/
public class LibraryRecordTypePageController {
	
    @AuraEnabled
    public static Map<String,String> getRecordTypeName() {
        Map<String,String> mapOfRecordTypeIdWithRecordTypeName = new Map<String,String>(); 
        Schema.DescribeSObjectResult librarySObjectRes = Library_Items__c.SObjectType.getDescribe();
        for(String recordTypeId : librarySObjectRes.getRecordTypeInfosById().keyset()) {
            if(librarySObjectRes.getRecordTypeInfosById().get(recordTypeId).getName() != 'Master') {
                String recordTypeName = librarySObjectRes.getRecordTypeInfosById().get(recordTypeId).getName();
                mapOfRecordTypeIdWithRecordTypeName.put(recordTypeId,recordTypeName);
            }
        }
        return mapOfRecordTypeIdWithRecordTypeName;
    }
    
    @AuraEnabled
    public static List<Library_Items__c> getLibraryItem(String libraryRecTypeId) {
        return [SELECT Id FROM Library_Items__c WHERE RecordTypeId =: libraryRecTypeId];
    }
}