duorameng
78 lines
1.6 KiB
Go
78 lines
1.6 KiB
Go
package constant
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import (
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"bufio"
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"bytes"
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_ "embed"
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"encoding/json"
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"math/rand"
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"sync"
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)
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//go:embed sentence1-10000.json
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var sentenceData []byte
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type Sentence struct {
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Name string `json:"name"`
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From string `json:"from"`
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}
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var (
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lineCount int
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lineOffsets []int64
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sentenceOnce sync.Once
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)
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// initSentences 初始化：统计行数和记录每行偏移
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func initSentences() {
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sentenceOnce.Do(func() {
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scanner := bufio.NewScanner(bytes.NewReader(sentenceData))
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var offset int64 = 0
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for scanner.Scan() {
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lineOffsets = append(lineOffsets, offset)
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// scanner.Bytes() returns the line without newline
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offset += int64(len(scanner.Bytes())) + 1 // +1 for newline
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lineCount++
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}
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})
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}
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// GetRandomSentence 随机获取一条古诗词
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func GetRandomSentence() string {
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initSentences()
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if lineCount == 0 {
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return "欢迎使用白虎面板"
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}
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targetIndex := rand.Intn(lineCount)
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start := lineOffsets[targetIndex]
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// 找到行结束位置（通过下一个偏移量或文件末尾）
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var end int64
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if targetIndex < lineCount-1 {
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end = lineOffsets[targetIndex+1] - 1 // -1 移除换行符
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} else {
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end = int64(len(sentenceData))
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}
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// 确保不越界并移除末尾可能的回车符 (Windows \r\n)
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line := sentenceData[start:end]
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line = bytes.TrimRight(line, "\r\n")
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var sData []string
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if err := json.Unmarshal(line, &sData); err == nil && len(sData) >= 1 {
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name := sData[0]
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from := ""
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if len(sData) >= 2 {
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from = sData[1]
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}
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if from != "" {
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return "\"" + name + "\"—— " + from
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}
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return name
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}
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return "欢迎使用白虎面板"
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}
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