feat: add message template

service/message_template_service/message_template.go

@@ -0,0 +1,185 @@
+package message_template_service
+
+import (
+	"encoding/json"
+	"errors"
+	"message-nest/models"
+	"strings"
+)
+
+type MessageTemplateService struct {
+	ID               string
+	Name             string
+	Description      string
+	TextTemplate     string
+	HTMLTemplate     string
+	MarkdownTemplate string
+	Placeholders     string
+	AtMobiles        string
+	AtUserIds        string
+	IsAtAll          bool
+	Status           string
+	Text             string
+	
+	PageNum  int
+	PageSize int
+}
+
+// Placeholder 占位符定义
+type Placeholder struct {
+	Key     string `json:"key"`
+	Label   string `json:"label"`
+	Default string `json:"default"`
+}
+
+// Add 添加消息模板
+func (s *MessageTemplateService) Add() error {
+	if err := s.validatePlaceholders(); err != nil {
+		return err
+	}
+	
+	newUUID := models.GenerateTemplateUniqueID()
+	model := models.MessageTemplate{
+		UUIDModel: models.UUIDModel{
+			ID: newUUID,
+		},
+		Name:             s.Name,
+		Description:      s.Description,
+		TextTemplate:     s.TextTemplate,
+		HTMLTemplate:     s.HTMLTemplate,
+		MarkdownTemplate: s.MarkdownTemplate,
+		Placeholders:     s.Placeholders,
+		AtMobiles:        s.AtMobiles,
+		AtUserIds:        s.AtUserIds,
+		IsAtAll:          s.IsAtAll,
+		Status:           s.Status,
+	}
+	
+	return model.Add()
+}
+
+// Update 更新消息模板
+func (s *MessageTemplateService) Update() error {
+	if err := s.validatePlaceholders(); err != nil {
+		return err
+	}
+	
+	model := models.MessageTemplate{
+		UUIDModel: models.UUIDModel{
+			ID: s.ID,
+		},
+		Name:             s.Name,
+		Description:      s.Description,
+		TextTemplate:     s.TextTemplate,
+		HTMLTemplate:     s.HTMLTemplate,
+		MarkdownTemplate: s.MarkdownTemplate,
+		Placeholders:     s.Placeholders,
+		AtMobiles:        s.AtMobiles,
+		AtUserIds:        s.AtUserIds,
+		IsAtAll:          s.IsAtAll,
+		Status:           s.Status,
+	}
+	
+	return model.Update()
+}
+
+// Delete 删除消息模板
+func (s *MessageTemplateService) Delete() error {
+	model := models.MessageTemplate{
+		UUIDModel: models.UUIDModel{
+			ID: s.ID,
+		},
+	}
+	return model.Delete()
+}
+
+// Get 获取单个消息模板
+func (s *MessageTemplateService) Get() (*models.MessageTemplateResult, error) {
+	return models.GetMessageTemplateByID(s.ID)
+}
+
+// GetAll 获取消息模板列表
+func (s *MessageTemplateService) GetAll() ([]models.MessageTemplateResult, error) {
+	templates, err := models.GetMessageTemplates(s.PageNum, s.PageSize, s.Text, s.getMaps())
+	if err != nil {
+		return nil, err
+	}
+	return templates, nil
+}
+
+// Count 获取消息模板总数
+func (s *MessageTemplateService) Count() (int64, error) {
+	return models.GetMessageTemplatesTotal(s.Text, s.getMaps())
+}
+
+// ExistByID 检查模板是否存在
+func (s *MessageTemplateService) ExistByID() (bool, error) {
+	return models.ExistMessageTemplateByID(s.ID)
+}
+
+// RenderTemplate 渲染模板（替换占位符）
+func (s *MessageTemplateService) RenderTemplate(templateContent string, params map[string]string) string {
+	result := templateContent
+	
+	for key, value := range params {
+		placeholder := "{{" + key + "}}"
+		result = strings.ReplaceAll(result, placeholder, value)
+	}
+	
+	return result
+}
+
+// PreviewTemplate 预览模板效果
+func (s *MessageTemplateService) PreviewTemplate(params map[string]string) (map[string]string, error) {
+	template, err := s.Get()
+	if err != nil {
+		return nil, err
+	}
+	
+	result := make(map[string]string)
+	
+	if template.TextTemplate != "" {
+		result["text"] = s.RenderTemplate(template.TextTemplate, params)
+	}
+	
+	if template.HTMLTemplate != "" {
+		result["html"] = s.RenderTemplate(template.HTMLTemplate, params)
+	}
+	
+	if template.MarkdownTemplate != "" {
+		result["markdown"] = s.RenderTemplate(template.MarkdownTemplate, params)
+	}
+	
+	return result, nil
+}
+
+// validatePlaceholders 验证占位符格式
+func (s *MessageTemplateService) validatePlaceholders() error {
+	if s.Placeholders == "" {
+		return nil
+	}
+	
+	var placeholders []Placeholder
+	if err := json.Unmarshal([]byte(s.Placeholders), &placeholders); err != nil {
+		return errors.New("占位符格式错误，必须是有效的JSON数组")
+	}
+	
+	for _, p := range placeholders {
+		if p.Key == "" {
+			return errors.New("占位符的key不能为空")
+		}
+	}
+	
+	return nil
+}
+
+// getMaps 获取查询条件
+func (s *MessageTemplateService) getMaps() map[string]interface{} {
+	maps := make(map[string]interface{})
+	
+	if s.Status != "" {
+		maps["status"] = s.Status
+	}
+	
+	return maps
+}