opcotech/elemo

package model

import (
    "errors"
    "time"

    "github.com/opcotech/elemo/internal/pkg/validate"
)

// Attachment represents an attachment on a resource.
type Attachment struct {
    ID        ID         `json:"id" validate:"required"`
    Name      string     `json:"name" validate:"required,min=3,max=120"`
    FileID    string     `json:"file_id" validate:"required"`
    CreatedBy ID         `json:"created_by" validate:"required"`
    CreatedAt *time.Time `json:"created_at" validate:"omitempty"`
    UpdatedAt *time.Time `json:"updated_at" validate:"omitempty"`
}

func (c *Attachment) Validate() error {
    if err := validate.Struct(c); err != nil {
        return errors.Join(ErrInvalidAttachmentDetails, err)
    }
    if err := c.ID.Validate(); err != nil {
        return errors.Join(ErrInvalidAttachmentDetails, err)
    }
    if err := c.CreatedBy.Validate(); err != nil {
        return errors.Join(ErrInvalidAttachmentDetails, err)
    }
    return nil
}

// NewAttachment creates a new Attachment.
func NewAttachment(name, fileID string, createdBy ID) (*Attachment, error) {
    attachment := &Attachment{
        ID:        MustNewNilID(ResourceTypeAttachment),
        Name:      name,
        FileID:    fileID,
        CreatedBy: createdBy,
    }

    if err := attachment.Validate(); err != nil {
        return nil, err
    }

    return attachment, nil
}