tagstack

type GetRedisConnFuncType func(shard_key int) redis.Conn

type HighTagNotifyFuncType func(tags []string)

type Index struct {
	// To describe what's this index about, for example: Blog / News
	// And the string should be as short as possible, for the string is the prefix of all the keys in the redis database.
	What string

	// High Node Boundary:
	// A parameter to balance between memory usage & search speed:
	// the higher: the index size smaller & search slower.
	// normally a value of 100 is Ok.
	HighNodeBoundary int

	// the rule of this index.
	// please see type Rule struct for detail.
	Rule *Rule

	// Item loading funcation
	ItemLoadFunc ItemLoadFuncType

	// Optional: Enable this if you use 'RandomSuggestTags' method.
	// Note: If the items usually have more than 20 tags, this SHOULD NOT be enabled, because this feature will slow down the indexing progress to a "minutes per update" level.
	EnableRandomSuggestTags bool
	// contains filtered or unexported fields
}

type IndexOptions struct {
	SortBy   SORT_BY
	Reversal bool   // TODO: feature
	WhoseId  uint64 // TODO: feature
}

type Item interface {
	// The item's identifier in uint64.
	Id() uint64

	// The basic score / value of this item.
	Score() float64

	// What's the item's tag, and the scores.
	// If there's no score among the tags, just pass scores with nil.
	TagsWithScore() (tags []string, scores []float64)

	// Whose item? the item id in uint64
	WhoseId() uint64

	// When did this item created.
	CreateDate() uint64
}

type ItemLoadFuncType func(id uint64) Item

type Rule struct {
	Normalization map[string][]string
	Entanglement  [][]string
	Containing    map[string][]string
}

type SORT_BY int

type Tag string