66 lines
2.7 KiB
Go
66 lines
2.7 KiB
Go
// Package package 提供套餐生命周期领域规则。
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package packagedomain
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import (
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"github.com/break/junhong_cmp_fiber/internal/model"
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"github.com/break/junhong_cmp_fiber/pkg/constants"
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"github.com/break/junhong_cmp_fiber/pkg/errors"
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)
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// TermsSnapshot 套餐购买时不可变计时条款。
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type TermsSnapshot struct {
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ExpiryBase string
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CalendarType string
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DurationMonths int
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DurationDays int
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}
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// ResolveTermsSnapshot 解析并校验套餐购买时计时条款。
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func ResolveTermsSnapshot(pkg *model.Package, allocation *model.ShopPackageAllocation) (TermsSnapshot, error) {
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if pkg == nil {
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return TermsSnapshot{}, errors.New(errors.CodeInvalidParam, "套餐计时条款缺失")
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}
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expiryBase := pkg.ExpiryBase
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if allocation != nil && allocation.ExpiryBaseOverride != nil {
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expiryBase = *allocation.ExpiryBaseOverride
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}
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if expiryBase != constants.PackageExpiryBaseFromActivation && expiryBase != constants.PackageExpiryBaseFromPurchase {
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return TermsSnapshot{}, errors.New(errors.CodeInvalidParam, "套餐生效条件无效")
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}
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if pkg.CalendarType == constants.PackageCalendarTypeNaturalMonth {
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if pkg.DurationMonths <= 0 {
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return TermsSnapshot{}, errors.New(errors.CodeInvalidParam, "套餐自然月时长无效")
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}
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return TermsSnapshot{ExpiryBase: expiryBase, CalendarType: pkg.CalendarType, DurationMonths: pkg.DurationMonths}, nil
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}
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if pkg.CalendarType == constants.PackageCalendarTypeByDay && pkg.DurationDays > 0 {
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return TermsSnapshot{ExpiryBase: expiryBase, CalendarType: pkg.CalendarType, DurationDays: pkg.DurationDays}, nil
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}
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return TermsSnapshot{}, errors.New(errors.CodeInvalidParam, "套餐按天时长无效")
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}
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// Apply 将计时条款写入套餐使用记录。
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func (s TermsSnapshot) Apply(usage *model.PackageUsage) {
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usage.ExpiryBaseSnapshot = s.ExpiryBase
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usage.CalendarTypeSnapshot = s.CalendarType
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usage.DurationMonthsSnapshot = s.DurationMonths
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usage.DurationDaysSnapshot = s.DurationDays
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}
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// IsValid 判断快照是否完整有效。
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func (s TermsSnapshot) IsValid() bool {
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if s.ExpiryBase != constants.PackageExpiryBaseFromActivation && s.ExpiryBase != constants.PackageExpiryBaseFromPurchase {
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return false
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}
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return (s.CalendarType == constants.PackageCalendarTypeNaturalMonth && s.DurationMonths > 0) ||
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(s.CalendarType == constants.PackageCalendarTypeByDay && s.DurationDays > 0)
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}
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// TermsSnapshotFromUsage 从使用记录读取计时条款。
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func TermsSnapshotFromUsage(usage *model.PackageUsage) TermsSnapshot {
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return TermsSnapshot{
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ExpiryBase: usage.ExpiryBaseSnapshot, CalendarType: usage.CalendarTypeSnapshot,
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DurationMonths: usage.DurationMonthsSnapshot, DurationDays: usage.DurationDaysSnapshot,
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}
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}
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