timoth-y/kicksware-api

package mongo

import (
    "context"
    "crypto/tls"
    "crypto/x509"
    "io/ioutil"
    "time"

    "github.com/pkg/errors"
    "go.kicksware.com/api/shared/config"
    "go.mongodb.org/mongo-driver/bson"
    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
    "go.mongodb.org/mongo-driver/mongo/readpref"

    "github.com/golang/glog"
    "go.kicksware.com/api/shared/core/meta"
    "go.kicksware.com/api/shared/util"

    "go.kicksware.com/api/services/orders/core/model"
    "go.kicksware.com/api/services/orders/core/repo"
    "go.kicksware.com/api/services/orders/usecase/business"
)

type repository struct {
    client     *mongo.Client
    database   *mongo.Database
    collection *mongo.Collection
    timeout    time.Duration
}

func NewRepository(config config.DataStoreConfig) (repo.OrderRepository, error) {
    repo := &repository{
        timeout:  time.Duration(config.Timeout) * time.Second,
    }
    client, err := newMongoClient(config); if err != nil {
        return nil, errors.Wrap(err, "repository.NewRepository")
    }
    repo.client = client
    database := client.Database(config.Database)
    repo.database = database
    repo.collection = database.Collection(config.Collection)
    return repo, nil
}

func newMongoClient(config config.DataStoreConfig) (*mongo.Client, error) {
    ctx, cancel := context.WithTimeout(context.Background(), time.Duration(config.Timeout)*time.Second)
    defer cancel()
    client, err := mongo.Connect(ctx, options.Client().
        ApplyURI(config.URL),
    )
    err = client.Ping(ctx, readpref.Primary()); if err != nil {
        return nil, err
    }
    return client, nil
}

func newTLSConfig(tlsConfig *meta.TLSCertificate) *tls.Config {
    if !tlsConfig.EnableTLS {
        return nil
    }
    certs := x509.NewCertPool()
    pem, err := ioutil.ReadFile(tlsConfig.CertFile); if err != nil {
        glog.Fatalln(err)
    }
    certs.AppendCertsFromPEM(pem)
    return &tls.Config{
        RootCAs: certs,
    }
}

func (r *repository) FetchOne(code string, params *meta.RequestParams) (*model.Order, error) {
    ctx, cancel := context.WithTimeout(context.Background(), r.timeout)
    defer cancel()

    query := r.buildQueryPipeline(bson.M{"unique_id": code}, params)
    cursor, err := r.collection.Aggregate(ctx, query); if err != nil {
        return nil, errors.Wrap(err, "repository.Order.FetchOne")
    }
    defer cursor.Close(ctx)

    var orders []*model.Order
    if err = cursor.All(ctx, &orders); err != nil {
        return nil, errors.Wrap(err, "repository.Order.FetchOne")
    }
    if orders == nil || len(orders) == 0 {
        if err == mongo.ErrNoDocuments{
            return nil, errors.Wrap(business.ErrOrderNotFound, "repository.Order.FetchOne")
        }
        return nil, errors.Wrap(err, "repository.Order.FetchOne")
    }
    return orders[0], nil
}

func (r *repository) Fetch(codes []string, params *meta.RequestParams) ([]*model.Order, error) {
    ctx, cancel := context.WithTimeout(context.Background(), r.timeout)
    defer cancel()

    query := r.buildQueryPipeline(bson.M{"unique_id": bson.M{"$in": codes}}, params)
    cursor, err := r.collection.Aggregate(ctx, query); if err != nil  {
        return nil, errors.Wrap(err, "repository.Order.Fetch")
    }
    defer cursor.Close(ctx)

    var orders []*model.Order
    if err = cursor.All(ctx, &orders); err != nil {
        return nil, errors.Wrap(err, "repository.Order.Fetch")
    }
    if orders == nil || len(orders) == 0 {
        if err == mongo.ErrNoDocuments {
            return nil, errors.Wrap(business.ErrOrderNotFound, "repository.Order.Fetch")
        }
        return nil, errors.Wrap(err, "repository.Order.Fetch")
    }
    return orders, nil
}

func (r *repository) FetchAll(params *meta.RequestParams) ([]*model.Order, error) {
    ctx, cancel := context.WithTimeout(context.Background(), r.timeout)
    defer cancel()

    query := r.buildQueryPipeline(bson.M{}, params)
    cursor, err := r.collection.Aggregate(ctx, query); if err != nil  {
        return nil, errors.Wrap(err, "repository.Order.FetchAll")
    }
    defer cursor.Close(ctx)

    var order []*model.Order
    if err = cursor.All(ctx, &order); err != nil {
        if err == mongo.ErrNoDocuments {
            return nil, errors.Wrap(business.ErrOrderNotFound, "repository.Order.FetchAll")
        }
        return nil, errors.Wrap(err, "repository.Order.FetchAll")
    }
    return order, nil
}

func (r *repository) FetchQuery(query meta.RequestQuery, params *meta.RequestParams) ([]*model.Order, error) {
    ctx, cancel := context.WithTimeout(context.Background(), r.timeout)
    defer cancel()

    filter, err := query.ToBson(); if err != nil {
        return nil, errors.Wrap(err, "repository.Order.FetchQuery")
    }
    queryPipe := r.buildQueryPipeline(filter, params)
    cursor, err := r.collection.Aggregate(ctx, queryPipe)
    if err != nil  {
        return nil, errors.Wrap(err, "repository.Order.FetchQuery")
    }
    defer cursor.Close(ctx)

    var orders []*model.Order
    if err = cursor.All(ctx, &orders); err != nil {
        return nil, errors.Wrap(err, "repository.Order.FetchQuery")
    }
    if orders == nil || len(orders) == 0 {
        return nil, errors.Wrap(business.ErrOrderNotFound, "repository.Order.FetchQuery")
    }
    return orders, nil
}

func (r *repository) StoreOne(order *model.Order) error {
    ctx, cancel := context.WithTimeout(context.Background(), r.timeout)
    defer cancel()
    _, err := r.collection.InsertOne(ctx, order)
    if err != nil {
        return errors.Wrap(err, "repository.Order.Store")
    }
    return nil
}

func (r *repository) Modify(order *model.Order) error {
    ctx, cancel := context.WithTimeout(context.Background(), r.timeout)
    defer cancel()
    doc, err := util.ToBsonMap(order); if err != nil {
        return errors.Wrap(err, "repository.Order.Modify")
    }
    update := bson.D{
        {"$set", doc},
    }
    filter := bson.M{"unique_id": order.UniqueID}
    if _, err = r.collection.UpdateOne(ctx, filter, update); err != nil {
        return errors.Wrap(err, "repository.Order.Modify")
    }
    return nil
}

func (r *repository) Remove(code string) error {
    ctx, cancel := context.WithTimeout(context.Background(), r.timeout)
    defer cancel()
    filter := bson.M{"unique_id": code}
    if _, err := r.collection.DeleteOne(ctx, filter); err != nil {
        return errors.Wrap(err, "repository.Order.Remove")
    }
    return nil
}

func (r *repository) Count(query meta.RequestQuery, params *meta.RequestParams) (int, error) {
    ctx, cancel := context.WithTimeout(context.Background(), r.timeout)
    defer cancel()

    filter, err := query.ToBson(); if err != nil {
        return 0, errors.Wrap(err, "repository.Order.Count")
    }

    count, err := r.collection.CountDocuments(ctx, filter); if err != nil {
        return 0, errors.Wrap(err, "repository.Order.Count")
    }
    return int(count), nil
}

func (r *repository) CountAll() (int, error) {
    ctx, cancel := context.WithTimeout(context.Background(), r.timeout)
    defer cancel()

    filter := bson.M{}
    count, err := r.collection.CountDocuments(ctx, filter); if err != nil {
        return 0, errors.Wrap(err, "repository.Order.Count")
    }
    return int(count), nil
}


func (r *repository) buildQueryPipeline(matchQuery bson.M, param *meta.RequestParams) mongo.Pipeline {
    pipe := mongo.Pipeline{}
    pipe = append(pipe, bson.D{{"$match", matchQuery}})

    return pipe
}