fix: Use paradigms to reduce logic duplication

api/pack/common.go

@@ -19,6 +19,7 @@ package pack
 import (
 	api "github.com/west2-online/fzuhelper-server/api/model/model"
 	"github.com/west2-online/fzuhelper-server/kitex_gen/model"
+	"github.com/west2-online/fzuhelper-server/pkg/base"
 )
 
 func BuildTermList(termList *model.TermList) *api.TermList {
@@ -29,14 +30,7 @@ func BuildTermList(termList *model.TermList) *api.TermList {
 }
 
 func BuildTerms(termList []*model.Term) []*api.Term {
-	if len(termList) == 0 {
-		return nil
-	}
-	terms := make([]*api.Term, len(termList))
-	for i, term := range termList {
-		terms[i] = BuildTerm(term)
-	}
-	return terms
+	return base.BuildTypeList(termList, BuildTerm)
 }
 
 func BuildTerm(term *model.Term) *api.Term {
@@ -67,12 +61,5 @@ func BuildTermEvent(termEvent *model.TermEvent) *api.TermEvent {
 }
 
 func BuildTermEvents(termEvents []*model.TermEvent) []*api.TermEvent {
-	if len(termEvents) == 0 {
-		return nil
-	}
-	events := make([]*api.TermEvent, len(termEvents))
-	for i, termEvent := range termEvents {
-		events[i] = BuildTermEvent(termEvent)
-	}
-	return events
+	return base.BuildTypeList(termEvents, BuildTermEvent)
 }

internal/common/pack/term.go

@@ -18,6 +18,7 @@ package pack
 
 import (
 	"github.com/west2-online/fzuhelper-server/kitex_gen/model"
+	"github.com/west2-online/fzuhelper-server/pkg/base"
 	"github.com/west2-online/jwch"
 )
 
@@ -48,14 +49,7 @@ func BuildTerm(term jwch.CalTerm) *model.Term {
 }
 
 func BuildTerms(terms []jwch.CalTerm) []*model.Term {
-	if len(terms) == 0 {
-		return nil
-	}
-	termList := make([]*model.Term, len(terms))
-	for i, term := range terms {
-		termList[i] = BuildTerm(term)
-	}
-	return termList
+	return base.BuildTypeList(terms, BuildTerm)
 }
 
 func BuildTermEvent(term jwch.CalTermEvent) *model.TermEvent {
@@ -67,13 +61,5 @@ func BuildTermEvent(term jwch.CalTermEvent) *model.TermEvent {
 }
 
 func BuildTermEvents(events []jwch.CalTermEvent) []*model.TermEvent {
-	if len(events) == 0 {
-		return nil
-	}
-
-	termEvents := make([]*model.TermEvent, len(events))
-	for i, event := range events {
-		termEvents[i] = BuildTermEvent(event)
-	}
-	return termEvents
+	return base.BuildTypeList(events, BuildTermEvent)
 }

pkg/base/pack.go

@@ -86,3 +86,15 @@ func HandleJwchError(err error) error {
 	}
 	return err
 }
+
+func BuildTypeList[T any, U any](items []U, buildFunc func(U) T) []T {
+	if len(items) == 0 {
+		return nil
+	}
+
+	list := make([]T, len(items))
+	for i, item := range items {
+		list[i] = buildFunc(item)
+	}
+	return list
+}