/*Created to give manual sharing to affiliated organizations with public groups(same name) if 'Make Public' field equals=true*/

trigger AffiliationMakePublicContactTrigger on npe5__Affiliation__c (after insert, after update, before delete) {
 
    // Get the Account Name Details
    Set<Id> AcctId = new Set<Id>();
    List<Account> AccountLists = new List<Account>();
    Map<Id,String> AccountNameMap = new Map<Id,String>();
    
    if (!Trigger.isDelete) {
        List<npe5__Affiliation__c> affiliations = [select Id, npe5__Organization__c, npe5__Organization__r.Id, Make_Public__c, npe5__Contact__r.Id from npe5__Affiliation__c where Id IN: Trigger.newMap.keyset()];
        for(npe5__Affiliation__c aff : affiliations)
        {
         
         if(aff.npe5__Organization__r != null)
         {
            AcctId.add(aff.npe5__Organization__r.Id);
         }

        }
         
         if(AcctId.size() > 0)
         {
             AccountLists  = [select Id,name from Account where Id IN: AcctId];
         }

        for(Account acc :AccountLists  )
        {
            AccountNameMap.put(acc.id,acc.Name);
        }
        
        // Get the Group Details
        List<Group> groups = [SELECT Email,Id,Name FROM Group];

        Map<String,Id> GroupMap = new MAp<String,Id>();
        for( Group grp:groups)
        {
            if(grp.Name != null && grp.Name != '')
            {
                GroupMap.put(grp.Name,grp.Id);
            }
        }
      
      // inserting new records
      if (Trigger.isInsert) {
                 
        List<ContactShare> sharesToCreate = new List<ContactShare>();

        
          for (npe5__Affiliation__c affiliation : affiliations) {
            
          if (affiliation.Make_Public__c == true) 
          {

            // create the new share for group
            ContactShare cs = new ContactShare();
            cs.ContactAccessLevel = 'Edit';
            cs.ContactId = affiliation.npe5__Contact__r.Id;        
            system.debug(cs.ContactId);
            if(GroupMap.containsKey(AccountNameMap.get(affiliation.npe5__Organization__r.Id)))
                    cs.UserOrGroupId = GroupMap.get(AccountNameMap.get(affiliation.npe5__Organization__r.Id));   
            sharesToCreate.add(cs);

          }
        }

        // do the DML to create shares
        if (!sharesToCreate.isEmpty())
          insert sharesToCreate;

      // updating existing records
      } else if (Trigger.isUpdate) {

        List<ContactShare> sharesToCreate = new List<ContactShare>();
        List<ID> shareIdsToDelete = new List<ID>();

        for (npe5__Affiliation__c affiliation : affiliations) {

          // if the record was public but is now private -- delete the existing share
          if (Trigger.oldMap.get(affiliation.Id).Make_Public__c == true && affiliation.Make_Public__c == false) {
            shareIdsToDelete.add(affiliation.npe5__Contact__r.Id);

          // if the record was private but now is public -- create the new share for the group
          } else if (Trigger.oldMap.get(affiliation.Id).Make_Public__c == false && affiliation.Make_Public__c == true) {
            
            // create the new share with read/write access
            ContactShare cs = new ContactShare();
            cs.ContactAccessLevel = 'Edit';
            cs.ContactId = affiliation.npe5__Contact__r.Id;
            if(GroupMap.containsKey(AccountNameMap.get(affiliation.npe5__Organization__r.Id)))
                    cs.UserOrGroupId =  GroupMap.get(AccountNameMap.get(affiliation.npe5__Organization__r.Id));   
            sharesToCreate.add(cs);

          }

        }

        // do the DML to delete shares
        if (!shareIdsToDelete.isEmpty())
          delete [select id from ContactShare where ContactId IN :shareIdsToDelete and RowCause = 'Manual'];

        // do the DML to create shares
        if (!sharesToCreate.isEmpty())
          insert sharesToCreate;

      }
  }
  else if (Trigger.isDelete) {
        
        List<ID> shareIdsToDelete = new List<ID>();
      Set<Id> AcctId = new Set<Id>();
        List<npe5__Affiliation__c> affiliations = [select Id, npe5__Organization__c, npe5__Organization__r.Id, Make_Public__c, npe5__Contact__r.Id from npe5__Affiliation__c where Id IN: Trigger.oldMap.keyset()];
        for (npe5__Affiliation__c affiliation : affiliations) {
      shareIdsToDelete.add(affiliation.npe5__Contact__r.Id);
            
          if(affiliation.npe5__Organization__r != null)
            {
              AcctId.add(affiliation.npe5__Organization__r.Id);
            }
        }
          if(AcctId.size() > 0)
            {
              AccountLists  = [select Id,name from Account where Id IN: AcctId];
            }

           for(Account acc :AccountLists  )
            {
              AccountNameMap.put(acc.id,acc.Name);
            }
          
           // Get the Group Details
            List<Group> groups = [SELECT Email,Id,Name FROM Group];
    
            Map<String,Id> GroupMap = new MAp<String,Id>();
            for( Group grp:groups)
            {
                if(grp.Name != null && grp.Name != '')
                {
                    GroupMap.put(grp.Name,grp.Id);
                }
            }
          // Get the Affiliation Id
          List<ID> affiliategroupID = new List<ID>();
          List<npe5__Affiliation__c> possibleaffiliations = [select Id, npe5__Organization__c, npe5__Organization__r.Id, Make_Public__c, npe5__Contact__r.Id from npe5__Affiliation__c where Id IN: Trigger.oldMap.keyset()];
          for (npe5__Affiliation__c affiliation : possibleaffiliations){
              if(GroupMap.containsKey(AccountNameMap.get(affiliation.npe5__Organization__r.Id)))
              {
                   affiliategroupID.add(GroupMap.get(AccountNameMap.get(affiliation.npe5__Organization__r.Id)));
              }
          }

        // do the DML to delete shares
        if (!shareIdsToDelete.isEmpty())
          delete [select id from ContactShare where ContactId IN :shareIdsToDelete and RowCause = 'Manual' and UserOrGroupId IN :affiliategroupID];
    }
}