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db.collection.aggregate([{$match:{}},{$group:{_id:"$location.branchId",data:{$push:"$$ROOT"}}},{$replaceWith:{$arrayToObject:[{$concatArrays:[[{"k":"_id",v:"$_id"}],{$map:{input:"$data",in:{k:"$$this.name",v:{started:{$eq:["$$this.action","started"]},processing:{$eq:["$$this.action","processing"]},errored:{$eq:["$$this.action","errored"]},completed:{$eq:["$$this.action","completed"]}}}}}]}]}}])