Optimize multiple "and" statements in mongo aggregate - mongodb

Question

Is there a simpler way that would also improve the performance of this mongodb query. I know I am suppose to group the either one or the other but cant find any docs or example to help me out.
const facetQuery = { $facet: {
xCreated: [
{ $match : { $and : [{ queueStatus: 'Created' }, { queueType: 'x' } ]}},
{ $count: "Created" },
],
xApproved: [
{ $match : { $and : [{ queueStatus: 'Approved' }, { queueType: 'x' }]}},
{ $count: "Approved" }
],
xDisapproved: [
{ $match : { $and : [{ queueStatus: 'Disapproved' }, { queueType: 'x' }]}},
{ $count: "Disapproved" }
],
yCreated: [
{ $match : { $and : [{ queueStatus: 'Created' }, { queueType: 'y' }]}},
{ $count: "Created" },
],
yApproved: [
{ $match : { $and : [{ queueStatus: 'Approved' }, { queueType: 'y' }]}},
{ $count: "Approved" }
],
yDisapproved: [
{ $match : { $and : [{ queueStatus: 'Disapproved' }, { queueType: 'y' }]}},
{ $count: "Disapproved" }
],
zCreated: [
{ $match : { $and : [{ queueStatus: 'Created' }, { queueType: 'z' }]}},
{ $count: "Created" },
],
zApproved: [
{ $match : { $and : [{ queueStatus: 'Approved' }, { queueType: 'z' }]}},
{ $count: "Approved" }
],
zDisapproved: [
{ $match : { $and : [{ queueStatus: 'Disapproved' }, { queueType: 'z' }]}},
{ $count: "Disapproved" }
],
}};

Answer 1

Oh wow, instead of doing all these separate matches and count you can just dynamically $group on both status and type and then construct the object you need from that:
db.collection.aggregate([
{
$group: {
_id: {
type: "$queueType",
status: "$queueStatus"
},
ApprovedCount: {
$sum: {
$cond: [
{
$eq: [
"$queueStatus",
"Approved"
]
},
1,
0
]
}
},
CreatedCount: {
$sum: {
$cond: [
{
$eq: [
"$queueStatus",
"Created"
]
},
1,
0
]
}
},
DisapprovedCount: {
$sum: {
$cond: [
{
$eq: [
"$queueStatus",
"Disapproved"
]
},
1,
0
]
}
},
}
},
{
$replaceRoot: {
newRoot: {
$mergeObjects: {
$arrayToObject: [
[
{
k: {
$concat: [
"$_id.type",
"$_id.status"
]
},
v: {
$switch: {
branches: [
{
case: {
$eq: [
"$_id.status",
"Approved"
]
},
then: "$ApprovedCount"
},
{
case: {
$eq: [
"$_id.status",
"Created"
]
},
then: "$CreatedCount"
},
{
case: {
$eq: [
"$_id.status",
"Disapproved"
]
},
then: "$DisapprovedCount"
},
]
}
}
}
]
]
}
}
}
}
])
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