feat: add books APIs

internal/repository/magazine_repo.go

@@ -0,0 +1,89 @@
+package repository
+
+import (
+	"context"
+
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+type MagazineRepo struct {
+	meta   *mongo.Collection
+	issues *mongo.Collection
+}
+
+func NewMagazineRepo(db *MongoDB) *MagazineRepo {
+	return &MagazineRepo{
+		meta:   db.Collection("magazine_meta"),
+		issues: db.Collection("magazine_issues"),
+	}
+}
+
+type MagazineMetaDoc struct {
+	ID   bson.ObjectID `bson:"_id" json:"id"`
+	Book string        `bson:"book" json:"book"`
+	Data interface{}   `bson:"data" json:"data"`
+}
+
+type MagazineIssueDoc struct {
+	ID         bson.ObjectID `bson:"_id" json:"id"`
+	Book       string        `bson:"book" json:"book"`
+	Volume     *int          `bson:"volume,omitempty" json:"volume,omitempty"`
+	Part       int           `bson:"part" json:"part"`
+	Title      string        `bson:"title" json:"title"`
+	Slug       string        `bson:"slug" json:"slug"`
+	Order      int           `bson:"order" json:"order"`
+	Paragraphs []string      `bson:"paragraphs" json:"paragraphs"`
+}
+
+func (r *MagazineRepo) GetAllMetas(ctx context.Context) ([]MagazineMetaDoc, error) {
+	cursor, err := r.meta.Find(ctx, bson.M{})
+	if err != nil {
+		return nil, err
+	}
+	defer cursor.Close(ctx)
+	var results []MagazineMetaDoc
+	if err := cursor.All(ctx, &results); err != nil {
+		return nil, err
+	}
+	return results, nil
+}
+
+func (r *MagazineRepo) GetMeta(ctx context.Context, book string) (*MagazineMetaDoc, error) {
+	var doc MagazineMetaDoc
+	err := r.meta.FindOne(ctx, bson.M{"book": book}).Decode(&doc)
+	if err != nil {
+		if err == mongo.ErrNoDocuments {
+			return nil, nil
+		}
+		return nil, err
+	}
+	return &doc, nil
+}
+
+func (r *MagazineRepo) GetIssues(ctx context.Context, book string) ([]MagazineIssueDoc, error) {
+	opts := options.Find().SetSort(bson.M{"order": 1})
+	cursor, err := r.issues.Find(ctx, bson.M{"book": book}, opts)
+	if err != nil {
+		return nil, err
+	}
+	defer cursor.Close(ctx)
+	var results []MagazineIssueDoc
+	if err := cursor.All(ctx, &results); err != nil {
+		return nil, err
+	}
+	return results, nil
+}
+
+func (r *MagazineRepo) GetIssue(ctx context.Context, book, slug string) (*MagazineIssueDoc, error) {
+	var doc MagazineIssueDoc
+	err := r.issues.FindOne(ctx, bson.M{"book": book, "slug": slug}).Decode(&doc)
+	if err != nil {
+		if err == mongo.ErrNoDocuments {
+			return nil, nil
+		}
+		return nil, err
+	}
+	return &doc, nil
+}