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44 lines
848 B
44 lines
848 B
2 years ago
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package errs
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var Relation = &relation{m: make(map[int]map[int]struct{})}
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func init() {
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Relation.Add(RecordNotFoundError, UserIDNotFoundError)
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Relation.Add(RecordNotFoundError, GroupIDNotFoundError)
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Relation.Add(DuplicateKeyError, UserIDExisted)
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Relation.Add(DuplicateKeyError, GroupIDExisted)
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}
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type relation struct {
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m map[int]map[int]struct{}
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}
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func (r *relation) Add(codes ...int) {
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if len(codes) < 2 {
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panic("codes length must be greater than 2")
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}
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for i := 1; i < len(codes); i++ {
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parent := codes[i-1]
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s, ok := r.m[parent]
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if !ok {
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s = make(map[int]struct{})
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r.m[parent] = s
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}
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for _, code := range codes[i:] {
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s[code] = struct{}{}
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}
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}
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}
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func (r *relation) Is(parent, child int) bool {
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if parent == child {
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return true
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}
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s, ok := r.m[parent]
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if !ok {
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return false
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}
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_, ok = s[child]
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return ok
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}
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