34 lines
663 B
Go
34 lines
663 B
Go
package html
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import "strings"
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// path.go: ParseBlockID extracts the slot sequence from a data-block ID.
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// Example: ParseBlockID("L-0-C-0") returns []byte{'L', 'C'}.
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func ParseBlockID(id string) []byte {
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if id == "" {
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return nil
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}
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// Split on "-" and require the exact structural pattern:
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// slot, 0, slot, 0, ...
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var slots []byte
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i := 0
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for part := range strings.SplitSeq(id, "-") {
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if i%2 == 0 {
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if len(part) != 1 {
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return nil
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}
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if _, ok := slotRegistry[part[0]]; !ok {
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return nil
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}
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slots = append(slots, part[0])
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} else if part != "0" {
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return nil
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}
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i++
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}
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if i == 0 || i%2 != 0 {
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return nil
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}
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return slots
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}
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