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/*
* vidhublog: Vidhu Kant's Blog
* Copyright (C) 2022 Vidhu Kant Sharma <vidhukant@protonmail.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package blog
import (
"html/template"
"net/http"
"strconv"
"strings"
"github.com/MikunoNaka/vidhukant.xyz/db"
"github.com/gin-gonic/gin"
)
type tagsSelection struct {
TagID int
TagName string
IsSelected bool
}
// database connection
var base *dbhandler
func init() {
connection := db.ConnectDB()
base = newHandler(connection)
}
// receives tags through form POST and redirects to /posts?tags=....
func filterByTagInput(ctx *gin.Context) {
var tagInput struct {
Tags []int `form:"tags"`
}
ctx.ShouldBind(&tagInput)
tags := tagInput.Tags
var tagsStringified string
for i, j := range tags {
tagsStringified = tagsStringified + strconv.Itoa(j)
if i != len(tags) - 1 {
tagsStringified = tagsStringified + ","
}
}
ctx.Redirect(http.StatusMovedPermanently, "/posts?tags=" + tagsStringified)
}
func getPosts(ctx *gin.Context) {
limitOptions := []int{10, 20, 30}
limit := 10
// if limit is in url query use that
if l := ctx.Query("limit"); l != "" {
limit, _ = strconv.Atoi(l)
}
pageNum := 1
// if pageNum is in url query use that
if p := ctx.Query("page"); p != "" {
pageNum, _ = strconv.Atoi(p)
// pageNum can't be less than 1
if pageNum < 1 { pageNum = 1 }
}
// if firstPost is in url query use that
firstPost := limit * (pageNum - 1)
if f := ctx.Query("first"); f != "" {
firstPost, _ = strconv.Atoi(f)
// firstPost can't be less than 0
if firstPost < 0 {firstPost = 0}
}
tags := ctx.Query("tags")
// check and sort by oldest/newest first with oldest as fallback
sortByOldest := false
if s := ctx.Query("sort_by"); s == "oldest" {
sortByOldest = true
}
// get posts from database
posts := base.getPosts(firstPost, limit, sortByOldest, tags)
showNext := true
// TODO: if tags are specified, replace with nil
// check if difference between all post count and posts shown is same
if base.getPostCount(nil) - (firstPost + len(posts)) < 1 {
showNext = false
}
// turn the tags from URL query into []int
var tagsSlice []int
for _, i := range strings.Split(tags, ",") {
t, _ := strconv.Atoi(i)
tagsSlice = append(tagsSlice, t)
}
// check if particular tags are selected
var selectedTags []tagsSelection
for _, i := range base.getTags() {
var t tagsSelection
t.TagID = i.ID
t.TagName = i.Name
// check and set t.IsSelected to true
for _, j := range tagsSlice {
if t.TagID == j {
t.IsSelected = true
break
}
}
selectedTags = append(selectedTags, t)
}
ctx.HTML(http.StatusOK, "views/posts.html", gin.H {
"LimitOptions": limitOptions,
"Limit": limit,
"FirstPost": firstPost,
"PageNumber": pageNum,
"PrevPage": pageNum - 1,
"ShowPrev": !(firstPost == 0),
"ShowNext": showNext,
"NextPage": pageNum + 1,
"PrevFirst": firstPost - limit,
"NextFirst": firstPost + limit,
"Posts": posts,
"SortByOldest": sortByOldest,
"Tags": selectedTags,
})
}
func getPost(ctx *gin.Context) {
id, _ := strconv.Atoi(ctx.Param("id"))
post := base.getPost(id)
ctx.HTML(http.StatusOK, "views/post.html", gin.H {
"Title": post.Title,
"CreatedAt": post.CreatedAt,
"UpdatedAt": post.UpdatedAt,
"Content": template.HTML(post.Content),
})
}
func HomePage(ctx *gin.Context) {
recentPosts := base.getPosts(0, 10, true, "")
tags := base.getTags()
ctx.HTML(http.StatusOK, "views/home.html", gin.H {
"RecentPosts": recentPosts,
"Tags": tags,
})
}
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