86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
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package entity
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import (
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"errors"
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"time"
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"github.com/gocql/gocql"
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)
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// Category represents a category entity for organizing posts.
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type Category struct {
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ID gocql.UUID `db:"id" partition_key:"true"` // Category unique identifier
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Slug string `db:"slug"` // URL-friendly slug (unique)
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Name string `db:"name"` // Category name
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Description *string `db:"description,omitempty"` // Category description (optional)
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ParentID *gocql.UUID `db:"parent_id,omitempty"` // Parent category ID (for nested categories)
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PostCount int64 `db:"post_count"` // Number of posts in this category
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IsActive bool `db:"is_active"` // Whether the category is active
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SortOrder int32 `db:"sort_order"` // Sort order for display
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CreatedAt int64 `db:"created_at"` // Creation timestamp
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UpdatedAt int64 `db:"updated_at"` // Last update timestamp
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}
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// TableName returns the Cassandra table name for Category entities.
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func (c *Category) TableName() string {
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return "categories"
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}
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// Validate validates the Category entity
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func (c *Category) Validate() error {
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if c.Name == "" {
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return errors.New("category name is required")
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}
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if c.Slug == "" {
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return errors.New("category slug is required")
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}
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return nil
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}
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// SetTimestamps sets the create and update timestamps
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func (c *Category) SetTimestamps() {
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now := time.Now().UTC().UnixNano() / 1e6 // milliseconds
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if c.CreatedAt == 0 {
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c.CreatedAt = now
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}
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c.UpdatedAt = now
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}
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// IsNew returns true if this is a new category (no ID set)
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func (c *Category) IsNew() bool {
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var zeroUUID gocql.UUID
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return c.ID == zeroUUID
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}
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// IsRoot returns true if this category has no parent
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func (c *Category) IsRoot() bool {
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var zeroUUID gocql.UUID
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return c.ParentID == nil || *c.ParentID == zeroUUID
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}
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// IncrementPostCount increments the post count
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func (c *Category) IncrementPostCount() {
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c.PostCount++
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c.SetTimestamps()
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}
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// DecrementPostCount decrements the post count
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func (c *Category) DecrementPostCount() {
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if c.PostCount > 0 {
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c.PostCount--
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c.SetTimestamps()
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}
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}
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// Activate activates the category
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func (c *Category) Activate() {
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c.IsActive = true
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c.SetTimestamps()
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}
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// Deactivate deactivates the category
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func (c *Category) Deactivate() {
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c.IsActive = false
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c.SetTimestamps()
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}
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