Eloquent sum of units within duration from date - eloquent

Question

I have a table (projects) which contains a start_date and duration (in weeks) and a number (progress_pw) as to how much progress units can be achieved per week
projects
+----+----------+--------+-----------+
| ID |start_date|duration|progress_pw|
+----+----------+--------+-----------+
| 1 |2018-06-15| 2 | 500 |
| 2 |2018-06-19| 4 | 120 |
I want to get a summary by week of the total number of progress units expected to be used in that given week.
Eg:
*In the week starting Monday 11 June project.id 1 is expected to consume 500 units
*In the week starting Monday 18 June project.id 1 is expected to consume 500 units & project.id 2 is expected to consume 120 units with a total consumption of 620 units.
*In the week starting 2018-12-01 (sometime in the future) there are no active projects so 0 units consumed.
$i=0;$weeks=12;
while ($i < $weeks) {
$thisweek = Carbon::now()->addWeeks($i)->startOfWeek()->format('Y-m-d');
$requiredcap = DB::table('projects')->select(DB::raw("sum(progress_pw) as progress"))
->where('install_date', ">=", $thisweek) //<<< This is where im getting stuck!
->get();
$capacity['label'][] = Carbon::now()->addWeeks($i)->startOfWeek()->format('d M');
$capacity['required'][] = $requiredcap;
$i++;
}
Any pointers of the logic behind this one?

Answer 1

Try this:
$i = 0; $weeks = 12;
while ($i < $weeks) {
$start = Carbon::now()->addWeeks($i)->startOfWeek();
$end = (clone $start)->addDays(6);
$requiredcap = DB::table('projects')
->select(DB::raw('sum(progress_pw) as progress'))
->whereBetween('start_date', [$start->toDateString(), $end->toDateString()])
->orWhere(function ($query) use ($start, $end) {
$query->where('start_date', '<', $start->toDateString())
->where('end_date', '>=', $start->toDateString());
})->first();
$capacity['label'][] = $start->format('d M');
$capacity['required'][] = $requiredcap->progress;
$i++;
}