ContentDocumentLink_Trigger

ContentDocumentLink_Trigger

trigger ContentDocumentLink_Trigger on ContentDocumentLink (after insert) {
    
    if(Trigger.isAfter && Trigger.isInsert){
        Set<ID> contentDocIds = new Set<ID>();
        for(ContentDocumentLink cdl: Trigger.new){
            contentDocIds.add(cdl.ContentDocumentId);
        }
        
        Set<Id> eventIds = new Set<Id>();
        Map<String,String> eventMap = new Map<String,String>();
        
        for(ContentDocumentLink cdlObj: Trigger.new)
        {
            if(String.valueOf(cdlObj.LinkedEntityId).startsWith('00U')){ //Check if file is uploaded on event object
                eventIds.add(cdlObj.LinkedEntityId);
            }
            
        }
        for(Event e:[select id,whatId from Event where Id IN:eventIds]){
            eventMap.put(e.Id, e.whatId);
        }
        Map<String,String> parentRecMap = new Map<String,String>();
        for(ContentDocumentLink cdl: Trigger.new){
            if(String.valueOf(cdl.LinkedEntityId).startsWith('00U')){ //Check if file is uploaded on event object
                if(String.valueOf(eventMap.get(cdl.LinkedEntityId)).startsWith('001')) //Check if event parent is Account 
                    parentRecMap.put(cdl.ContentDocumentId, eventMap.get(cdl.LinkedEntityId)); //Map<ContentDocumentId,AccountId>
            }
            
        }
        List<ContentDocumentLink> cdl_List = new List<ContentDocumentLink>();
        if(ContentDocumentLink_TriggerHelper.Flag == true){
            ContentDocumentLink_TriggerHelper.Flag = false;
            for(String str: parentRecMap.keySet()){
                ContentDocumentLink cdl = new ContentDocumentLink(); // Content Document Link to share the file with Account(Parent) record
                cdl.LinkedEntityId = parentRecMap.get(str); // Account ID
                cdl.ContentDocumentId = str; //Content Dcoument ID
                cdl.ShareType = 'V';
                cdl.Visibility = 'InternalUsers';
                cdl_List.add(cdl);
                
            }
        }
        system.debug('Size : '+ cdl_List);
        if(cdl_List.size()>0)
            ContentDocumentLink_TriggerHelper.shareFile(cdl_List);// Insert Content Document Link to share the file with Account 
        
    }
}

Ah! Ok. Updated!

Thanks