From 46ae1cab83bdef60dd8a85cc78ad95a499e9f9d2 Mon Sep 17 00:00:00 2001
From: Usman Shahid <usmanshahid.h@gmail.com>
Date: Thu, 24 Oct 2019 16:39:11 +0500
Subject: [PATCH] Added support for deleting metadata; Allow blank values

---
 .vs/CustomMetadataLoader/v15/.suo             | Bin 0 -> 7680 bytes
 .../CustomMetadataUploadController.cls        |  27 +++++++++++++++
 custom_md_loader/classes/MetadataUtil.cls     |  32 +++++++++++++++---
 .../pages/CustomMetadataRecordUploader.page   |   9 +++++
 4 files changed, 64 insertions(+), 4 deletions(-)
 create mode 100644 .vs/CustomMetadataLoader/v15/.suo

diff --git a/.vs/CustomMetadataLoader/v15/.suo b/.vs/CustomMetadataLoader/v15/.suo
new file mode 100644
index 0000000000000000000000000000000000000000..8a0b3d11a2fa6b18d8b428c64cd314672aef9d95
GIT binary patch
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diff --git a/custom_md_loader/classes/CustomMetadataUploadController.cls b/custom_md_loader/classes/CustomMetadataUploadController.cls
index 44c2351..4bf3e8c 100644
--- a/custom_md_loader/classes/CustomMetadataUploadController.cls
+++ b/custom_md_loader/classes/CustomMetadataUploadController.cls
@@ -44,6 +44,33 @@ public class CustomMetadataUploadController {
             }
         }
     }
+
+    public PageReference deleteCustomMetaData() {
+        ApexPages.getMessages().clear();
+        showRecordsTable = false;
+        deleteCustomMetadtaRecords();
+        // TODO: Add Success Message / Display Errors
+        return null;
+    }
+    
+    private void deleteCustomMetadtaRecords() {
+        if(selectedType == 'Select type') {
+            ApexPages.Message errorMessage = new ApexPages.Message(ApexPages.severity.ERROR, 'Please choose a valid custom metadata type.');
+            ApexPages.addMessage(errorMessage);
+            return;
+        }
+        
+        String query = 'SELECT DeveloperName FROM ' + selectedType;
+        
+        List<sObject> customRecords = Database.query(query);
+        List<String> recordsToDelete = new List<String>();
+        
+        for (sObject record : customRecords) {
+            recordsToDelete.add(selectedType + '.' + record.get('DeveloperName'));
+        }
+        
+        MetadataUtil.deleteMetadata('CustomMetadata', recordsToDelete);
+    }
     
     public PageReference upsertCustomMetadata() {
         ApexPages.getMessages().clear();
diff --git a/custom_md_loader/classes/MetadataUtil.cls b/custom_md_loader/classes/MetadataUtil.cls
index a1e6650..19c9082 100644
--- a/custom_md_loader/classes/MetadataUtil.cls
+++ b/custom_md_loader/classes/MetadataUtil.cls
@@ -87,10 +87,6 @@ public class MetadataUtil {
             List<String> fieldValueList = new List<String>();
 
             for (String singleRowFieldValues :singleRowOfValues) {
-                if (String.isBlank(singleRowFieldValues)) {
-                    continue;
-                }
-            
                 fieldValueList.addAll(singleRowFieldValues.split(';'));
             }
             for(String fieldName : fieldNameSet) {
@@ -152,6 +148,34 @@ public class MetadataUtil {
         customMetadata.values = customMetadataValues;
         return customMetadata;
     }
+
+    public static void deleteMetadata(String type_x,String[] fullNames) {
+        List<MetadataService.DeleteResult> results = getPort().deleteMetadata(type_x, fullNames);
+        if (results!=null) {
+            for (MetadataService.DeleteResult deleteResult : results) {
+                if (deleteResult==null || deleteResult.success) {
+                     continue;
+                }
+                // Construct error message and throw an exception
+                if (deleteResult.errors!=null) {
+                    List<String> messages = new List<String>();
+                    messages.add((deleteResult.errors.size()==1 ? 'Error ' : 'Errors ') + 'occured processing component ' + deleteResult.fullName + '.');
+                    for(MetadataService.Error error : deleteResult.errors){
+                        messages.add(error.message + ' (' + error.statusCode + ').' + ( error.fields!=null && error.fields.size()>0 ? ' Fields ' + String.join(error.fields, ',') + '.' : '' ) );
+                    }
+                    if(messages.size()>0){
+                        ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.Error, String.join(messages, ' ')));
+                        System.debug(LoggingLevel.ERROR, String.join(messages, ''));
+                        return;
+                    }
+                }
+                if(!deleteResult.success){
+                    ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.Error, 'Request failed with no specified error.'));
+                    return;
+                }
+            }
+        }
+    }
     
     
     private static void upsertMetadataAndValidate(MetadataService.Metadata[] records) {
diff --git a/custom_md_loader/pages/CustomMetadataRecordUploader.page b/custom_md_loader/pages/CustomMetadataRecordUploader.page
index d22a11b..7da6003 100644
--- a/custom_md_loader/pages/CustomMetadataRecordUploader.page
+++ b/custom_md_loader/pages/CustomMetadataRecordUploader.page
@@ -22,6 +22,15 @@
                 </apex:pageBlockSection>
                </apex:ActionRegion>
             </apex:pageBlock>
+
+            <div align="center" draggable="false" >
+               <apex:ActionRegion >
+                <apex:commandButton value="Delete Custom MetaData Type" action="{!deleteCustomMetaData}" rendered="true"/>
+                <apex:actionSupport event="onclick"  action="{!deleteCustomMetaData}" rendered="{!showRecordsTable}" oncomplete="window.opener.location.reload();"/>
+              </apex:ActionRegion> 
+            </div>
+            <br/>
+            <br/>
       
             <div align="center" draggable="false" >
                <apex:ActionRegion >