chore: import upstream snapshot with attribution

internal/controller/template_render/controller.go

@@ -0,0 +1,124 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package templaterender
+
+import (
+	"math"
+
+	"github.com/apache/answer/internal/service/content"
+	questioncommon "github.com/apache/answer/internal/service/question_common"
+
+	"github.com/apache/answer/internal/service/comment"
+	"github.com/apache/answer/internal/service/siteinfo_common"
+	"github.com/google/wire"
+
+	"github.com/apache/answer/internal/schema"
+	"github.com/apache/answer/internal/service/tag"
+)
+
+// ProviderSetTemplateRenderController is template render controller providers.
+var ProviderSetTemplateRenderController = wire.NewSet(
+	NewTemplateRenderController,
+)
+
+type TemplateRenderController struct {
+	questionService *content.QuestionService
+	userService     *content.UserService
+	tagService      *tag.TagService
+	answerService   *content.AnswerService
+	commentService  *comment.CommentService
+	siteInfoService siteinfo_common.SiteInfoCommonService
+	questionRepo    questioncommon.QuestionRepo
+}
+
+func NewTemplateRenderController(
+	questionService *content.QuestionService,
+	userService *content.UserService,
+	tagService *tag.TagService,
+	answerService *content.AnswerService,
+	commentService *comment.CommentService,
+	siteInfoService siteinfo_common.SiteInfoCommonService,
+	questionRepo questioncommon.QuestionRepo,
+) *TemplateRenderController {
+	return &TemplateRenderController{
+		questionService: questionService,
+		userService:     userService,
+		tagService:      tagService,
+		answerService:   answerService,
+		commentService:  commentService,
+		questionRepo:    questionRepo,
+		siteInfoService: siteInfoService,
+	}
+}
+
+// Paginator page
+// page : now page
+// pageSize : Number per page
+// nums : Total
+// Returns the contents of the page in the format of 1, 2, 3, 4, and 5. If the contents are less than 5 pages, the page number is returned
+func Paginator(page, pageSize int, nums int64) *schema.Paginator {
+	if pageSize == 0 {
+		pageSize = 10
+	}
+
+	var prevpage int // Previous page address
+	var nextpage int // Address on the last page
+	// Generate the total number of pages based on the total number of nums and the number of prepage pages
+	totalpages := int(math.Ceil(float64(nums) / float64(pageSize))) // Total number of Pages
+	if page > totalpages {
+		page = totalpages
+	}
+	if page <= 0 {
+		page = 1
+	}
+	var pages []int
+	switch {
+	case page >= totalpages-5 && totalpages > 5: // The last 5 pages
+		start := totalpages - 5 + 1
+		prevpage = page - 1
+		nextpage = int(math.Min(float64(totalpages), float64(page+1)))
+		pages = make([]int, 5)
+		for i := range pages {
+			pages[i] = start + i
+		}
+	case page >= 3 && totalpages > 5:
+		start := page - 3 + 1
+		pages = make([]int, 5)
+		for i := range pages {
+			pages[i] = start + i
+		}
+		prevpage = page - 1
+		nextpage = page + 1
+	default:
+		pages = make([]int, int(math.Min(5, float64(totalpages))))
+		for i := range pages {
+			pages[i] = i + 1
+		}
+		prevpage = int(math.Max(float64(1), float64(page-1)))
+		nextpage = page + 1
+	}
+	paginator := &schema.Paginator{}
+	paginator.Pages = pages
+	paginator.Totalpages = totalpages
+	paginator.Prevpage = prevpage
+	paginator.Nextpage = nextpage
+	paginator.Currpage = page
+	return paginator
+}