grain/app/fetchRecentEvents.go
2024-08-06 10:34:53 -04:00

48 lines
1.1 KiB
Go

package app
import (
"context"
relay "grain/server/types"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
// FetchTopTenRecentEvents queries the database and returns the top ten most recent events.
func FetchTopTenRecentEvents(client *mongo.Client) ([]relay.Event, error) {
var results []relay.Event
collections, err := client.Database("grain").ListCollectionNames(context.TODO(), bson.M{})
if err != nil {
return nil, err
}
for _, collectionName := range collections {
collection := client.Database("grain").Collection(collectionName)
filter := bson.D{}
opts := options.Find().SetSort(bson.D{{Key: "createdat", Value: -1}}).SetLimit(10)
cursor, err := collection.Find(context.TODO(), filter, opts)
if err != nil {
return nil, err
}
defer cursor.Close(context.TODO())
for cursor.Next(context.TODO()) {
var event relay.Event
if err := cursor.Decode(&event); err != nil {
return nil, err
}
results = append(results, event)
}
if err := cursor.Err(); err != nil {
return nil, err
}
}
return results, nil
}