✨ 完善基础架构，新增部分问题接口

repository/base.go

@@ -0,0 +1,19 @@
+package repository
+
+import "gorm.io/gorm"
+
+// 分页组件
+func page(current, size int) func(db *gorm.DB) *gorm.DB {
+	return func(db *gorm.DB) *gorm.DB {
+		if current == 0 {
+			current = 1
+		}
+		if size < 1 {
+			size = 10
+		}
+		// 计算偏移量
+		offset := (current - 1) * size
+		// 返回组装结果
+		return db.Offset(offset).Limit(size)
+	}
+}

repository/problem.go

@@ -0,0 +1,31 @@
+package repository
+
+import (
+	"online_code/client"
+	"online_code/models/entity"
+	"online_code/models/param"
+)
+
+type problemService struct{}
+
+func ProblemService() *problemService {
+	return &problemService{}
+}
+
+// GetList 获取题目列表
+func (problemService) GetList(p param.GetProblemList) (records entity.Problem, count int64, err error) {
+	sel := client.MySQL.Scopes(page(p.Current, p.Size))
+
+	if p.Keyword != "" {
+		sel.Where("title LIKE ? OR content like ?", "%"+p.Keyword+"%", "%"+p.Keyword+"%")
+	}
+
+	err = sel.Order("updated_at DESC").Find(&records).Offset(-1).Limit(-1).Count(&count).Error
+	return
+}
+
+// GetProblemInfo 获取题目详情
+func (problemService) GetProblemInfo(id int) (problem entity.Problem, err error) {
+	err = client.MySQL.Where("id = ?", id).Find(&problem).Error
+	return
+}