cialloo
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81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
package logic
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import (
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"context"
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"database/sql"
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"fmt"
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"time"
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"git.cialloo.com/CiallooWeb/Blog/app/internal/svc"
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"git.cialloo.com/CiallooWeb/Blog/app/internal/types"
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"github.com/aws/aws-sdk-go-v2/service/s3"
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"github.com/zeromicro/go-zero/core/logx"
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)
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type GetPostLogic struct {
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logx.Logger
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ctx context.Context
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svcCtx *svc.ServiceContext
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}
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// Get a blog post by ID
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func NewGetPostLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetPostLogic {
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return &GetPostLogic{
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Logger: logx.WithContext(ctx),
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ctx: ctx,
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svcCtx: svcCtx,
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}
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}
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func (l *GetPostLogic) GetPost(req *types.GetPostReq) (resp *types.GetPostResp, err error) {
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var post types.GetPostResp
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var coverID sql.NullInt64
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// Query post with cover image
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query := `
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SELECT p.id, p.title, p.content, p.created_at, p.updated_at, p.cover_id
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FROM posts p
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WHERE p.id = $1
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`
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err = l.svcCtx.DB.QueryRowContext(l.ctx, query, req.PostId).Scan(
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&post.PostId, &post.Title, &post.Content, &post.CreatedAt, &post.UpdatedAt, &coverID,
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)
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if err != nil {
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if err == sql.ErrNoRows {
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l.Errorf("Post not found with id: %s", req.PostId)
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return nil, fmt.Errorf("post not found")
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}
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l.Errorf("Failed to get post: %v", err)
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return nil, err
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}
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// If cover image exists, get its URL
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if coverID.Valid {
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coverQuery := `SELECT file_key FROM files WHERE id = $1`
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var fileKey string
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err = l.svcCtx.DB.QueryRowContext(l.ctx, coverQuery, coverID.Int64).Scan(&fileKey)
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if err == nil {
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// Generate presigned URL for cover image
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expiration := time.Duration(l.svcCtx.Config.S3.PresignedURLExpiration) * time.Second
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presignClient := s3.NewPresignClient(l.svcCtx.S3Client)
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getObjectInput := &s3.GetObjectInput{
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Bucket: &l.svcCtx.Config.S3.Bucket,
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Key: &fileKey,
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}
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presignedReq, err := presignClient.PresignGetObject(l.ctx, getObjectInput, func(opts *s3.PresignOptions) {
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opts.Expires = expiration
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})
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if err == nil {
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post.CoverImageUrl = presignedReq.URL
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}
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}
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}
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// Convert timestamps to Unix
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post.CreatedAt = post.CreatedAt * 1000 // Convert to milliseconds if needed
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post.UpdatedAt = post.UpdatedAt * 1000
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return &post, nil
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}
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