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Example 1:

Add extra steps for a single document source (WarehouseReceiptHeader)

This example describes how to implement extra steps for a single document source for a planned document type (i.e. implement "Warehouse Receipts" for Receive, but not "Purchase Orders", "Transfer Orders" and "Sales Return Orders").
If you are implementing changes for multiple document sources, see "Example 2: Implement extra steps for all document sources (AnyHeader)".

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    // OnGetReceiveOrderLines
    // Create a RadioButton step in the default header collector (for warehouse receipts only)
    [EventSubscriber(ObjectType::Codeunit, Codeunit::"MOB WMS Receive", 'OnGetReceiveOrderLines_OnAddStepsToAnyHeader', '', true, true)]
    local procedure MyOnGetReceiveOrderLines_OnAddStepsToAnyHeader(_RecRef: RecordRef; var _StepsElement: Record "MOB Steps Element")
    begin
        if _RecRef.Number() <> Database::"Warehouse Receipt Header" then
            exit;

        _StepsElement.Create_RadioButtonStep(10000, 'MyPostingDateRadioButtonStep');
        _StepsElement.Set_header('Posting Date');
        _StepsElement.Set_listValues('Today;Yesterday;Other date');
        _StepsElement.Set_defaultValue('Today');
    end;

Step 1.2 - Interrupt posting (conditionally) to pick posting date from a calendar

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    // OnPostReceiveOrder
    // Create a conditional step on posting based on collected value from the 'MyPostingDateRadioButtonStep' created above
    [EventSubscriber(ObjectType::Codeunit, Codeunit::"MOB WMS Receive", 'OnPostReceiveOrder_OnAddStepsToWarehouseReceiptHeader', '', true, true)]
    local procedure MyOnPostReceiveOrder_OnAddStepsToWarehouseReceiptHeader(var _OrderValues: Record "MOB Common Element"; _WhseReceiptHeader: Record "Warehouse Receipt Header"; var _StepsElement: Record "MOB Steps Element")
    begin
        // Break when any option different from 'Other date' was selected in the 'MyPostingDateRadioButtonStep'
        if _OrderValues.GetValue('MyPostingDateRadioButtonStep') <> 'Other date' then
            exit;

        // Break if new datestep for 'Other date' is already collected to prevent infinite loop
        if _OrderValues.HasValue('MyPostingDate') then
            exit;

        // Create a new date step for manually selecting Posting Date
        _StepsElement.Create_DateStep(10000, 'MyPostingDate');
        _StepsElement.Set_header('Posting Date');
        _StepsElement.Set_minDate(Today() - 10);
        _StepsElement.Set_maxDate(Today());
    end;

Step 1.3 - Set Posting Date

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    // OnPostReceiveOrder
    // Set new posting date including using a value from conditional step 'MyPostingDate'
    [EventSubscriber(ObjectType::Codeunit, Codeunit::"MOB WMS Receive", 'OnPostReceiveOrder_OnBeforePostWarehouseReceipt', '', true, true)]
    local procedure MyOnPostReceiveOrder_OnBeforePostWarehouseReceipt(var _OrderValues: Record "MOB Common Element"; var _WhseReceiptHeader: Record "Warehouse Receipt Header")
    var
        PostingDate: Date;
    begin
        case _OrderValues.GetValue('MyPostingDateRadioButtonStep') of
            'Today':
                PostingDate := Today();
            'Yesterday':
                PostingDate := Today() - 1;
            'Other date':
                PostingDate := _OrderValues.GetValueAsDate('MyPostingDate', true);
        end;

        if (PostingDate <> 0D) and (PostingDate <> _WhseReceiptHeader."Posting Date") then
            _WhseReceiptHeader.Validate("Posting Date", PostingDate);
    end;

Example 2:

Add extra steps for all document sources (AnyHeader)

This example describes how to implement extra steps for planned document types with multiple document sources (i.e. implement "Warehouse Receipts" and "Purchase Orders" for Receive).
If you are implementing changes only for a specific specific document source, see "Example 1: Implement extra steps for a single document source (WarehouseReceiptHeader)".

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    // OnGetReceiveOrderLines
    // Create a step in the default header collector (displayed for "Warehouse Receipt" and "Purchase Order", but not "Transfer Order" or "Sales Return Order")
    [EventSubscriber(ObjectType::Codeunit, Codeunit::"MOB WMS Receive", 'OnGetReceiveOrderLines_OnAddStepsToAnyHeader', '', true, true)]
    local procedure MyOnGetReceiveOrderLines_OnAddStepsToAnyHeader(_RecRef: RecordRef; var _StepsElement: Record "MOB Steps Element")
    begin
        if (_RecRef.Number() in [Database::"Warehouse Receipt Header", Database::"Purchase Header"]) then begin
            _StepsElement.Create_RadioButtonStep(10000, 'MyPostingDateRadioButtonStep');
            _StepsElement.Set_header('Posting Date');
            _StepsElement.Set_listValues('Today;Yesterday;Other date');
            _StepsElement.Set_defaultValue('Today');
        end;
    end;

Step 2.2 - Interrupt posting (conditionally) to pick posting date from a calendar

...

    // OnPostReceiveOrder
    // Create a conditional step on posting based on collected value from the 'MyPostingDateRadioButtonStep' created above
    [EventSubscriber(ObjectType::Codeunit, Codeunit::"MOB WMS Receive", 'OnPostReceiveOrder_OnAddStepsToAnyHeader', '', true, true)]
    local procedure MyOnPostReceiveOrder_OnAddStepsToAnyHeader(var _OrderValues: Record "MOB Common Element"; _RecRef: RecordRef; var _StepsElement: Record "MOB Steps Element")
    begin
        // Break when any option different from 'Other date' was selected in the 'MyPostingDateRadioButtonStep'
        if _OrderValues.GetValue('MyPostingDateRadioButtonStep') <> 'Other date' then
            exit;

        // Break if new datestep for 'Other date' is already collected to prevent infinite loop
        if _OrderValues.HasValue('MyPostingDate') then
            exit;

        // Create a new date step for manually selecting Posting Date
        _StepsElement.Create_DateStep(10000, 'MyPostingDate');
        _StepsElement.Set_header('Posting Date');
        _StepsElement.Set_minDate(Today() - 10);
        _StepsElement.Set_maxDate(Today());
    end;

Step 2.3 - Set Posting Date

...

    // OnPostReceiveOrder
    // Set new posting date including using a value from conditional step 'MyPostingDate'. Step can exist only for "Warehouse Receipt" or "Purchase Order"
    [EventSubscriber(ObjectType::Codeunit, Codeunit::"MOB WMS Receive", 'OnPostReceiveOrder_OnBeforePostAnyOrder', '', true, true)]
    local procedure MyOnPostReceiveOrder_OnBeforePostAnyOrder(var _OrderValues: Record "MOB Common Element"; var _RecRef: RecordRef)
    var
        WhseReceiptHeader: Record "Warehouse Receipt Header";
        PurchHeader: Record "Purchase Header";
        PurchRelease: Codeunit "Release Purchase Document";
        PostingDate: Date;
    begin
        case _OrderValues.GetValue('MyPostingDateRadioButtonStep') of
            'Today':
                PostingDate := Today();
            'Yesterday':
                PostingDate := Today() - 1;
            'Other date':
                PostingDate := _OrderValues.GetValueAsDate('MyPostingDate', true);
        end;

        case _RecRef.Number() of
            Database::"Warehouse Receipt Header":
                begin
                    _RecRef.SetTable(WhseReceiptHeader);
                    if (PostingDate <> 0D) and (PostingDate <> WhseReceiptHeader."Posting Date") then
                        WhseReceiptHeader.Validate("Posting Date", PostingDate);
                    _RecRef.GetTable(WhseReceiptHeader);
                end;
            Database::"Purchase Header":
                begin
                    _RecRef.SetTable(PurchHeader);
                    PurchRelease.Reopen(PurchHeader);
                    PurchRelease.SetSkipCheckReleaseRestrictions();
                    PurchHeader.SetHideValidationDialog(true);   // same behavior when reprocessing from queue ie. no "change exchange rate" confirmation
                    PurchHeader.Validate("Posting Date", PostingDate);
                    PurchRelease.Run(PurchHeader);
                    _RecRef.GetTable(PurchHeader);
                end;
        end;