onasty @ 234f7640a37cda6214824da3125ccda420167697

package noterepo

import (

	"context"

	"database/sql"

	"errors"

	"time"

	"github.com/gofrs/uuid/v5"

	"github.com/henvic/pgq"

	"github.com/jackc/pgx/v5"

	"github.com/olexsmir/onasty/internal/dtos"

	"github.com/olexsmir/onasty/internal/models"

	"github.com/olexsmir/onasty/internal/store/psqlutil"

)

type NoteStorer interface {

	// Create creates a note.

	Create(ctx context.Context, note models.Note) error

	// GetBySlug gets a note by slug.

	// Returns [models.ErrNoteNotFound] if note is not found.

	GetBySlug(ctx context.Context, slug dtos.NoteSlug) (models.Note, error)

	// GetMetadataBySlug gets note's metadata by its slug.

	// Returns [models.ErrNoteNotFound] if note is not found OR read.

	GetMetadataBySlug(ctx context.Context, slug dtos.NoteSlug) (dtos.NoteMetadata, error)

	// GetAllByAuthorID returns all notes with specified author.

	GetAllByAuthorID(ctx context.Context, authorID uuid.UUID) ([]models.Note, error)

	// GetAllReadByAuthorID returns all notes that are read and authored by specified author.

	GetAllReadByAuthorID(ctx context.Context, authorID uuid.UUID) ([]models.Note, error)

	// GetAllUnreadByAuthorID returns all notes that are unread and authored by specified author.

	GetAllUnreadByAuthorID(ctx context.Context, authorID uuid.UUID) ([]models.Note, error)

	// GetCountOfNotesByAuthorID returns count of notes created by specified author.

	GetCountOfNotesByAuthorID(ctx context.Context, authorID uuid.UUID) (int64, error)

	// GetBySlugAndPassword gets a note by slug and password.

	// the "password" should be hashed.

	//

	// Returns [models.ErrNoteNotFound] if note is not found.

	GetBySlugAndPassword(

		ctx context.Context,

		slug dtos.NoteSlug,

		password string,

	) (models.Note, error)

	// UpdateExpirationTimeSettingsBySlug patches note by updating expiresAt and burnBeforeExpiration if one is passwd

	// Returns [models.ErrNoteNotFound] if note is not found.

	UpdateExpirationTimeSettingsBySlug(

		ctx context.Context,

		slug dtos.NoteSlug,

		patch dtos.PatchNote,

		authorID uuid.UUID,

	) error

	// RemoveBySlug marks note as read, deletes it's content, and keeps meta data

	// Returns [models.ErrNoteNotFound] if note is not found.

	RemoveBySlug(ctx context.Context, slug dtos.NoteSlug, readAt time.Time) error

	// DeleteNoteBySlug deletes(unlike [RemoveBySlug]) note by slug.

	// Returns [models.ErrNoteNotFound] if note is not found.

	DeleteNoteBySlug(ctx context.Context, slug dtos.NoteSlug, authorID uuid.UUID) error

	// SetAuthorIDBySlug assigns author to note by slug.

	// Returns [models.ErrNoteNotFound] if note is not found.

	SetAuthorIDBySlug(ctx context.Context, slug dtos.NoteSlug, authorID uuid.UUID) error

	// UpdatePasswordBySlug updates or sets password on a note.

	UpdatePasswordBySlug(

		ctx context.Context,

		slug dtos.NoteSlug,

		authorID uuid.UUID,

		passwd string,

	) error

}

var _ NoteStorer = (*NoteRepo)(nil)

type NoteRepo struct {

	db *psqlutil.DB

}

func New(db *psqlutil.DB) *NoteRepo {

	return &NoteRepo{db}

}

func (s *NoteRepo) Create(ctx context.Context, inp models.Note) error {

	query, args, err := pgq.

		Insert("notes").

		Columns("content", "slug", "password", "burn_before_expiration", "created_at", "expires_at").

		Values(inp.Content, inp.Slug, inp.Password, inp.BurnBeforeExpiration, inp.CreatedAt, inp.ExpiresAt).

		SQL()

	if err != nil {

		return err

	}

	_, err = s.db.Exec(ctx, query, args...)

	if psqlutil.IsDuplicateErr(err, "notes_slug_key") {

		return models.ErrNoteSlugIsAlreadyInUse

	}

	return err

}

func (s *NoteRepo) GetBySlug(ctx context.Context, slug dtos.NoteSlug) (models.Note, error) {

	query, args, err := pgq.

		Select("content", "slug", "burn_before_expiration", "read_at", "created_at", "expires_at").

		From("notes").

		Where("(password is null or password = '')").

		Where(pgq.Eq{"slug": slug}).

		SQL()

	if err != nil {

		return models.Note{}, err

	}

	var note models.Note

	var readAt sql.NullTime

	err = s.db.QueryRow(ctx, query, args...).

		Scan(&note.Content, &note.Slug, &note.BurnBeforeExpiration, &readAt, &note.CreatedAt, &note.ExpiresAt)

	if errors.Is(err, pgx.ErrNoRows) {

		return models.Note{}, models.ErrNoteNotFound

	}

	note.ReadAt = psqlutil.NullTimeToTime(readAt)

	return note, err

}

func (s *NoteRepo) GetMetadataBySlug(

	ctx context.Context,

	slug dtos.NoteSlug,

) (dtos.NoteMetadata, error) {

	query := `--sql

select n.created_at, (n.password is not null and n.password <> '') has_password, n.read_at

from notes n

where slug = $1`

	var readAt sql.NullTime

	var metadata dtos.NoteMetadata

	err := s.db.QueryRow(ctx, query, slug).Scan(&metadata.CreatedAt, &metadata.HasPassword, &readAt)

	if errors.Is(err, pgx.ErrNoRows) {

		return dtos.NoteMetadata{}, models.ErrNoteNotFound

	}

	if !psqlutil.NullTimeToTime(readAt).IsZero() {

		return dtos.NoteMetadata{}, models.ErrNoteNotFound

	}

	return metadata, err

}

func (s *NoteRepo) GetAllByAuthorID(

	ctx context.Context,

	authorID uuid.UUID,

) ([]models.Note, error) {

	query := `--sql

select n.content, n.slug, n.burn_before_expiration, n.password, n.read_at, n.created_at, n.expires_at

from notes n

inner join notes_authors na on n.id = na.note_id

where na.user_id = $1`

	return s.getAllNotes(ctx, query, authorID)

}

func (s *NoteRepo) GetAllReadByAuthorID(

	ctx context.Context,

	authorID uuid.UUID,

) ([]models.Note, error) {

	query := `--sql

select n.content, n.slug, n.burn_before_expiration, n.password, n.read_at, n.created_at, n.expires_at

from notes n

inner join notes_authors na on n.id = na.note_id

where na.user_id = $1

	and n.read_at is not null`

	return s.getAllNotes(ctx, query, authorID)

}

func (s *NoteRepo) GetAllUnreadByAuthorID(

	ctx context.Context,

	authorID uuid.UUID,

) ([]models.Note, error) {

	query := `--sql

select n.content, n.slug, n.burn_before_expiration, n.password, n.read_at, n.created_at, n.expires_at

from notes n

inner join notes_authors na on n.id = na.note_id

where na.user_id = $1

	and n.read_at is null`

	return s.getAllNotes(ctx, query, authorID)

}

func (s *NoteRepo) GetCountOfNotesByAuthorID(

	ctx context.Context,

	authorID uuid.UUID,

) (int64, error) {

	var count int64

	err := s.db.QueryRow(

		ctx,

		`select count(*) from notes_authors where user_id = $1`,

		authorID.String(),

	).Scan(&count)

	return count, err

}

func (s *NoteRepo) GetBySlugAndPassword(

	ctx context.Context,

	slug dtos.NoteSlug,

	passwd string,

) (models.Note, error) {

	query, args, err := pgq.

		Select("content", "slug", "burn_before_expiration", "read_at", "created_at", "expires_at").

		From("notes").

		Where(pgq.Eq{

			"slug":     slug,

			"password": passwd,

		}).

		SQL()

	if err != nil {

		return models.Note{}, err

	}

	var note models.Note

	var readAt sql.NullTime

	err = s.db.QueryRow(ctx, query, args...).

		Scan(&note.Content, &note.Slug, &note.BurnBeforeExpiration, &readAt, &note.CreatedAt, &note.ExpiresAt)

	if errors.Is(err, pgx.ErrNoRows) {

		return models.Note{}, models.ErrNoteNotFound

	}

	note.ReadAt = psqlutil.NullTimeToTime(readAt)

	return note, err

}

func (s *NoteRepo) UpdateExpirationTimeSettingsBySlug(

	ctx context.Context,

	slug dtos.NoteSlug,

	patch dtos.PatchNote,

	authorID uuid.UUID,

) error {

	query := `--sql

update notes n

set burn_before_expiration = COALESCE($1, n.burn_before_expiration),

    expires_at = COALESCE($2, n.expires_at)

from notes_authors na

where n.slug = $3

  and na.user_id = $4

  and na.note_id = n.id`

	ct, err := s.db.Exec(ctx, query,

		patch.BurnBeforeExpiration, patch.ExpiresAt,

		slug, authorID.String())

	if err != nil {

		return err

	}

	if ct.RowsAffected() == 0 {

		return models.ErrNoteNotFound

	}

	return nil

}

func (s *NoteRepo) RemoveBySlug(

	ctx context.Context,

	slug dtos.NoteSlug,

	readAt time.Time,

) error {

	query, args, err := pgq.

		Update("notes").

		Set("content", "").

		Set("read_at", readAt).

		Where(pgq.Eq{"slug": slug}).

		Where("read_at is null").

		SQL()

	if err != nil {

		return err

	}

	_, err = s.db.Exec(ctx, query, args...)

	if errors.Is(err, pgx.ErrNoRows) {

		return models.ErrNoteNotFound

	}

	return err

}

func (s *NoteRepo) DeleteNoteBySlug(

	ctx context.Context,

	slug dtos.NoteSlug,

	authorID uuid.UUID,

) error {

	query := `--sql

delete from notes n

using notes_authors na

where n.slug = $1

  and na.user_id = $2`

	ct, err := s.db.Exec(ctx, query, slug, authorID.String())

	if err != nil {

		return err

	}

	if ct.RowsAffected() == 0 {

		return models.ErrNoteNotFound

	}

	return nil

}

func (s *NoteRepo) SetAuthorIDBySlug(

	ctx context.Context,

	slug dtos.NoteSlug,

	authorID uuid.UUID,

) error {

	tx, err := s.db.Begin(ctx)

	if err != nil {

		return err

	}

	defer tx.Rollback(ctx) //nolint:errcheck

	var noteID uuid.UUID

	err = tx.QueryRow(ctx, "select id from notes where slug = $1", slug).Scan(&noteID)

	if err != nil {

		if errors.Is(err, pgx.ErrNoRows) {

			return models.ErrNoteNotFound

		}

		return err

	}

	_, err = tx.Exec(

		ctx,

		"insert into notes_authors (note_id, user_id) values ($1, $2)",

		noteID, authorID,

	)

	if err != nil {

		return err

	}

	return tx.Commit(ctx)

}

func (s *NoteRepo) UpdatePasswordBySlug(

	ctx context.Context,

	slug dtos.NoteSlug,

	authorID uuid.UUID,

	passwd string,

) error {

	query := `--sql

update notes n

set password = $1

from notes_authors na

where n.slug = $2

  and na.user_id = $3

  and na.note_id = n.id`

	ct, err := s.db.Exec(ctx, query, passwd, slug, authorID.String())

	if err != nil {

		return err

	}

	if ct.RowsAffected() == 0 {

		return models.ErrNoteNotFound

	}

	return nil

}

// getAllNotes is a helper function for [NoteRepo.GetAllByAuthorID], [NoteRepo.GetAllReadByAuthorID],

// and [NoteRepo.GetAllUnreadByAuthorID].

// The query's SELECT elements order should be consistent across all function calls.

func (s *NoteRepo) getAllNotes(

	ctx context.Context,

	query string,

	authorID uuid.UUID,

) ([]models.Note, error) {

	rows, err := s.db.Query(ctx, query, authorID.String())

	if err != nil {

		return nil, err

	}

	defer rows.Close()

	var notes []models.Note

	for rows.Next() {

		var note models.Note

		var readAt sql.NullTime

		if err := rows.Scan(&note.Content, &note.Slug, &note.BurnBeforeExpiration, &note.Password,

			&readAt, &note.CreatedAt, &note.ExpiresAt); err != nil {

			return nil, err

		}

		note.ReadAt = psqlutil.NullTimeToTime(readAt)

		notes = append(notes, note)

	}

	return notes, rows.Err()

}