feat: add books APIs

2026-05-09 23:19:19 +05:30
commit b055b8ba0c
43 changed files with 4307 additions and 0 deletions
@@ -0,0 +1,166 @@
+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 LetterRepo struct {
+	col *mongo.Collection
+}
+
+func NewLetterRepo(db *MongoDB) *LetterRepo {
+	return &LetterRepo{col: db.Collection("letters")}
+}
+
+type LetterDoc struct {
+	ID               bson.ObjectID `bson:"_id" json:"id"`
+	Slug             string        `bson:"slug" json:"slug"`
+	Recipients       []string      `bson:"recipients" json:"recipients"`
+	RecipientDisplay string        `bson:"recipientDisplay" json:"recipient_display"`
+	Date             *string       `bson:"date,omitempty" json:"date,omitempty"`
+	DateRef          *string       `bson:"dateRef,omitempty" json:"date_ref,omitempty"`
+	Year             *int          `bson:"year,omitempty" json:"year,omitempty"`
+	Month            *int          `bson:"month,omitempty" json:"month,omitempty"`
+	Day              *int          `bson:"day,omitempty" json:"day,omitempty"`
+	Location         *string       `bson:"location,omitempty" json:"location,omitempty"`
+	Salutation       *string       `bson:"salutation,omitempty" json:"salutation,omitempty"`
+	Paragraphs       []string      `bson:"paragraphs" json:"paragraphs"`
+}
+
+type LetterSummaryDoc struct {
+	ID               bson.ObjectID `bson:"_id" json:"id"`
+	Slug             string        `bson:"slug" json:"slug"`
+	Recipients       []string      `bson:"recipients" json:"recipients"`
+	RecipientDisplay string        `bson:"recipientDisplay" json:"recipient_display"`
+	Date             *string       `bson:"date,omitempty" json:"date,omitempty"`
+	Year             *int          `bson:"year,omitempty" json:"year,omitempty"`
+	Month            *int          `bson:"month,omitempty" json:"month,omitempty"`
+	Location         *string       `bson:"location,omitempty" json:"location,omitempty"`
+}
+
+var letterSummaryProjection = bson.M{
+	"slug": 1, "recipients": 1, "recipientDisplay": 1,
+	"date": 1, "year": 1, "month": 1, "location": 1,
+}
+
+func (r *LetterRepo) GetBySlug(ctx context.Context, slug string) (*LetterDoc, error) {
+	var doc LetterDoc
+	err := r.col.FindOne(ctx, bson.M{"slug": slug}).Decode(&doc)
+	if err != nil {
+		if err == mongo.ErrNoDocuments {
+			return nil, nil
+		}
+		return nil, err
+	}
+	return &doc, nil
+}
+
+func (r *LetterRepo) GetByYear(ctx context.Context, year int) ([]LetterSummaryDoc, error) {
+	opts := options.Find().
+		SetSort(bson.M{"month": 1, "day": 1}).
+		SetProjection(letterSummaryProjection)
+	cursor, err := r.col.Find(ctx, bson.M{"year": year}, opts)
+	if err != nil {
+		return nil, err
+	}
+	defer cursor.Close(ctx)
+	var results []LetterSummaryDoc
+	if err := cursor.All(ctx, &results); err != nil {
+		return nil, err
+	}
+	return results, nil
+}
+
+func (r *LetterRepo) GetByRecipient(ctx context.Context, name string) ([]LetterSummaryDoc, error) {
+	opts := options.Find().
+		SetSort(bson.M{"year": 1, "month": 1, "day": 1}).
+		SetProjection(letterSummaryProjection)
+	cursor, err := r.col.Find(ctx, bson.M{"recipients": name}, opts)
+	if err != nil {
+		return nil, err
+	}
+	defer cursor.Close(ctx)
+	var results []LetterSummaryDoc
+	if err := cursor.All(ctx, &results); err != nil {
+		return nil, err
+	}
+	return results, nil
+}
+
+func (r *LetterRepo) GetByLocation(ctx context.Context, location string) ([]LetterSummaryDoc, error) {
+	opts := options.Find().
+		SetSort(bson.M{"year": 1, "month": 1, "day": 1}).
+		SetProjection(letterSummaryProjection)
+	cursor, err := r.col.Find(ctx, bson.M{"location": location}, opts)
+	if err != nil {
+		return nil, err
+	}
+	defer cursor.Close(ctx)
+	var results []LetterSummaryDoc
+	if err := cursor.All(ctx, &results); err != nil {
+		return nil, err
+	}
+	return results, nil
+}
+
+func (r *LetterRepo) GetYears(ctx context.Context) ([]bson.M, error) {
+	pipeline := bson.A{
+		bson.M{"$match": bson.M{"year": bson.M{"$ne": nil}}},
+		bson.M{"$group": bson.M{"_id": "$year", "count": bson.M{"$sum": 1}}},
+		bson.M{"$sort": bson.M{"_id": 1}},
+	}
+	cursor, err := r.col.Aggregate(ctx, pipeline)
+	if err != nil {
+		return nil, err
+	}
+	defer cursor.Close(ctx)
+	var results []bson.M
+	if err := cursor.All(ctx, &results); err != nil {
+		return nil, err
+	}
+	return results, nil
+}
+
+func (r *LetterRepo) GetRecipients(ctx context.Context) ([]bson.M, error) {
+	pipeline := bson.A{
+		bson.M{"$unwind": "$recipients"},
+		bson.M{"$group": bson.M{"_id": "$recipients", "count": bson.M{"$sum": 1}}},
+		bson.M{"$sort": bson.M{"count": -1}},
+	}
+	cursor, err := r.col.Aggregate(ctx, pipeline)
+	if err != nil {
+		return nil, err
+	}
+	defer cursor.Close(ctx)
+	var results []bson.M
+	if err := cursor.All(ctx, &results); err != nil {
+		return nil, err
+	}
+	return results, nil
+}
+
+func (r *LetterRepo) GetLocations(ctx context.Context) ([]bson.M, error) {
+	pipeline := bson.A{
+		bson.M{"$match": bson.M{"location": bson.M{"$ne": nil}}},
+		bson.M{"$group": bson.M{"_id": "$location", "count": bson.M{"$sum": 1}}},
+		bson.M{"$sort": bson.M{"count": -1}},
+	}
+	cursor, err := r.col.Aggregate(ctx, pipeline)
+	if err != nil {
+		return nil, err
+	}
+	defer cursor.Close(ctx)
+	var results []bson.M
+	if err := cursor.All(ctx, &results); err != nil {
+		return nil, err
+	}
+	return results, nil
+}
+
+func (r *LetterRepo) Count(ctx context.Context) (int64, error) {
+	return r.col.CountDocuments(ctx, bson.M{})
+}