ryan
6f5aaa9f85
Motivation: 此前的修复仅覆盖直接拼接文案的场景，跟单等基于模板渲染的推送场景中，%.2f 格式化仍会把 PEPE 等 Meme 币的极小价格（如 0.00000059）折叠为 0.00，导致交易通知丢失真实价格、误导用户。 Changes: * 抽取共享的价格显示逻辑到统一显示层，两个订阅者改为复用，移除重复实现 * 新增 Decimal 类型，渲染时以副本方式包装模板数据，使模板内 printf 风格格式化保留极小价格精度且不出现科学计数法，同时不修改调用方原始数据 * 渲染引擎空值判断改用反射实现，覆盖全部整型、无符号整型与浮点类型 * 补充转换到渲染的端到端回归测试，覆盖极小价格精度、科学计数法与数据不可变性
102 lines
2.2 KiB
Go
102 lines
2.2 KiB
Go
package engine
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import (
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"bytes"
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"fmt"
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"reflect"
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"strings"
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"text/template"
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"aiaa-notification-service/internal/display"
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)
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type Renderer struct{}
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func NewRenderer() *Renderer {
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return &Renderer{}
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}
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func (r *Renderer) Render(tmplContent string, data map[string]interface{}) (string, error) {
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tmpl, err := template.New("notify").
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Option("missingkey=zero").
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Funcs(template.FuncMap{
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"line": templateLine,
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"case": templateCase,
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"replace": strings.ReplaceAll,
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}).
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Parse(tmplContent)
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if err != nil {
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return "", fmt.Errorf("parse template: %w", err)
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}
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var buf bytes.Buffer
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if err := tmpl.Execute(&buf, display.WrapMap(data)); err != nil {
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return "", fmt.Errorf("execute template: %w", err)
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}
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return buf.String(), nil
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}
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// templateLine renders "label：value\n" or empty if value is missing/zero.
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func templateLine(label string, v any) string {
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if isEmptyValue(v) {
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return ""
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}
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return strings.TrimRight(label, ":：") + "：" + fmt.Sprint(v) + "\n"
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}
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func templateCase(value any, pairs ...any) string {
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got := stringify(value)
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n := len(pairs)
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def := got
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if n%2 == 1 {
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def = stringify(pairs[n-1])
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pairs = pairs[:n-1]
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}
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for i := 0; i+1 < len(pairs); i += 2 {
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if caseKeyMatch(got, stringify(pairs[i])) {
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return stringify(pairs[i+1])
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}
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}
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return def
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}
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func caseKeyMatch(value, key string) bool {
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v := strings.ToLower(strings.TrimSpace(value))
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k := strings.ToLower(strings.TrimSpace(key))
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k = strings.TrimPrefix(k, ".")
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vSeg := v
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if i := strings.LastIndex(v, "."); i >= 0 {
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vSeg = v[i+1:]
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}
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return k == v || k == strings.TrimPrefix(v, ".") || k == vSeg
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}
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func stringify(v any) string {
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if v == nil {
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return ""
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}
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return fmt.Sprint(v)
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}
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func isEmptyValue(v any) bool {
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switch t := v.(type) {
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case nil:
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return true
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case string:
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return strings.TrimSpace(t) == ""
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case bool:
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return !t
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default:
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rv := reflect.ValueOf(v)
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switch rv.Kind() {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return rv.Int() == 0
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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return rv.Uint() == 0
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case reflect.Float32, reflect.Float64:
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return rv.Float() == 0
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default:
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return false
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}
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}
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}
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