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sneppaH
Regular Visitor

Feedback Loop for dependent workitems

Hello,

 

I am looking for some feedback for some code I wrote for a project of mine. The project is a basic "project management tool" custom built to our company specific processes. For these projects you can create "workpackages" and inside these workpackages there are "workitems". The idea is that you can add links to these workitems, stating that they are fixed or dependent on another workpackage.

This code will change all the start and end dates of the workitems that are linked to the fixed ones depending on the fixed one's start and end date and the duration of the dependent workitem. I believe it to be a basic version of what MS projects can also do.

 

This is the database that is being used: (a sharepoint list)

WerkDb.png

The most important columns for the code are:

- Projectcode: this will be used to filter out all the workitems of the selected project. This is a lookup column

- Startdatum and geplande einddatum: these are the start and planned end dates

- Afhankelijkheid: this column states of the workitems is dependent (afhankelijk) or fixed (vaste periode)

- afhankelijk_werk_voor: Multiselect lookup column that indicates the dependent workitems that need to preceed this workitem

- afhankelijk_werk_na: Multiselect lookup column that indicates the dependent workitems that need to take place after this workitem

 

And finally the code itself with comments:

 

 

 

 

 

 

 

 

//We start with a collection that filters all WorkItems from the selected project with an added column called interval that is the workitem //duration
ClearCollect(
    LinkWerk;
    AddColumns(
        Filter(
            WerkDb;
            Projectcode.Value = Projectdetails_5.ProjectcodeRef
        );
        "Interval";
        DateDiff(
            ThisRecord.Startdatum;
            ThisRecord.'Geplande einddatum'
        )
    )
);;

//Next up we will change all the startdate and enddate values of dependent workitems to blank
ForAll(
    Filter(
        LinkWerk;
        Afhankelijkheid.Value = "Afhankelijk"
    );
    Patch(
        LinkWerk;
        ThisRecord;
        {
            Startdatum: Blank();
            'Geplande einddatum': Blank()
        }
    )
);;

//Then we will perform the concurrent action for every dependent workitem
ForAll(
    Sequence(
        CountRows(
            Filter(
                LinkWerk;
                Afhankelijkheid.Value = "Afhankelijk"
            )
        )
    );
    
//The concurrent action exists out of two for all loops and each of those loops contains another forall loop. The two main forall loops will basically look at every workitem with dates not blank(forall) and will change the start and end date of every dependent workitem linked to this one. The first does it for the linked workitems that take place before the one with dates, the second for the linked workitems afters the one with dates. The idea is that this way the code will cascade down starting from fixed items that do not have blank dates to begin with and eventually end up with the furthest dependent workitem that might have a link in the nth degree (with n equal to the number of dependent workitems in the worst case, which is why I start with the first forall loop with the sequence in it)
    Concurrent(
        ForAll(
            Filter(
                LinkWerk;
                IsBlank(ThisRecord.Startdatum) = false
            ) As VastRecord;
            ForAll(
                VastRecord.Afhankelijk_werk_voor As AfhRecord;
                If(
                    IsBlank(
                        LookUp(
                            LinkWerk;
                            WerkNaam = AfhRecord.Value
                        ).'Geplande einddatum'
                    );
                    Patch(
                        LinkWerk;
                        LookUp(
                            LinkWerk;
                            WerkNaam = AfhRecord.Value
                        );
                        {
                            'Geplande einddatum': DateAdd(
                                VastRecord.Startdatum;
                                -1
                            );
                            Startdatum: DateAdd(
                                DateAdd(
                                    VastRecord.Startdatum;
                                    -1
                                );
                                -LookUp(
                                    LinkWerk;
                                    WerkNaam = AfhRecord.Value
                                ).Interval
                            )
                        }
                    );
                    If(
                        DateValue(
                            DateAdd(
                                VastRecord.Startdatum;
                                -1
                            )
                        ) < DateValue(
                            LookUp(
                                LinkWerk;
                                WerkNaam = AfhRecord.Value
                            ).'Geplande einddatum'
                        );
                        Patch(
                            LinkWerk;
                            LookUp(
                                LinkWerk;
                                WerkNaam = AfhRecord.Value
                            );
                            {
                                'Geplande einddatum': DateAdd(
                                    VastRecord.Startdatum;
                                    -1
                                );
                                Startdatum: DateAdd(
                                    DateAdd(
                                        VastRecord.Startdatum;
                                        -1
                                    );
                                    -LookUp(
                                        LinkWerk;
                                        WerkNaam = AfhRecord.Value
                                    ).Interval
                                )
                            }
                        )
                    )
                )
            )
        );
        ForAll(
            Filter(
                LinkWerk;
                IsBlank(ThisRecord.Startdatum) = false
            ) As VastRecord;
            ForAll(
                VastRecord.Afhankelijk_werk_na As AfhRecord;
                If(
                    IsBlank(
                        LookUp(
                            LinkWerk;
                            WerkNaam = AfhRecord.Value
                        ).Startdatum
                    );
                    Patch(
                        LinkWerk;
                        LookUp(
                            LinkWerk;
                            WerkNaam = AfhRecord.Value
                        );
                        {
                            Startdatum: DateAdd(
                                VastRecord.'Geplande einddatum';
                                1
                            );
                            'Geplande einddatum': DateAdd(
                                DateAdd(
                                    VastRecord.'Geplande einddatum';
                                    1
                                );
                                LookUp(
                                    LinkWerk;
                                    WerkNaam = AfhRecord.Value
                                ).Interval
                            )
                        }
                    );
                    If(
                        DateValue(
                            DateAdd(
                                VastRecord.'Geplande einddatum';
                                1
                            )
                        ) > DateValue(
                            LookUp(
                                LinkWerk;
                                WerkNaam = AfhRecord.Value
                            ).Startdatum
                        );
                        Patch(
                            LinkWerk;
                            LookUp(
                                LinkWerk;
                                WerkNaam = AfhRecord.Value
                            );
                            {
                                Startdatum: DateAdd(
                                    VastRecord.'Geplande einddatum';
                                    1
                                );
                                'Geplande einddatum': DateAdd(
                                    DateAdd(
                                        VastRecord.'Geplande einddatum';
                                        1
                                    );
                                    LookUp(
                                        LinkWerk;
                                        WerkNaam = AfhRecord.Value
                                    ).Interval
                                )
                            }
                        )
                    )
                )
            )
        )
    )
);;
//Then I drop the custom column and patch it back to the database
ClearCollect(
    LinkWerk2;
    DropColumns(
        LinkWerk;
        "Interval"
    )
);;
ForAll(
    LinkWerk2;
    Patch(
        WerkDb;
        ThisRecord
    )
);;

 

 

 

 

 

 

 

 

This code is triggered inside powerapps when you push a button on this screen:

screen.png

Since this is my first big code that I am running in the powerapp itself, I am wondering if what I wrote is acceptable and if I am on the right track. Any feedback welcome. (PS: I believe the code to be working correctly according to the tests I did)

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