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feed.go
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feed.go
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package handlers
import (
"context"
"encoding/json"
"strconv"
"strings"
"time"
"github.com/EngineerKamesh/gofullstack/volume3/section5/gopherface/models/socialmedia"
"honnef.co/go/js/dom"
"honnef.co/go/js/xhr"
"github.com/EngineerKamesh/gofullstack/volume3/section5/gopherface/client/common"
"github.com/EngineerKamesh/gofullstack/volume3/section5/gopherface/forms"
"github.com/gopherjs/gopherjs/js"
"go.isomorphicgo.org/go/isokit"
)
var postForm *forms.SocialMediaPostForm
func FeedHandler(env *common.Env) isokit.Handler {
return isokit.HandlerFunc(func(ctx context.Context) {
println("Client-side Feed Handler")
postForm = forms.NewSocialMediaPostForm(nil)
postForm.PageTitle = "Feed"
env.TemplateSet.Render("feed_content", &isokit.RenderParams{Data: postForm, Disposition: isokit.PlacementReplaceInnerContents, Element: env.PrimaryContent})
InitializeFeedEventHandlers(env)
})
}
func InitializeFeedEventHandlers(env *common.Env) {
if postForm == nil {
postForm = forms.NewSocialMediaPostForm(nil)
}
postButton := env.Document.GetElementByID("postButton").(*dom.HTMLButtonElement)
postButton.AddEventListener("click", false, func(event dom.Event) {
VerifyPostForm(env, event, postForm)
})
go PopulateFeedPosts(env)
}
func VerifyPostForm(env *common.Env, event dom.Event, postForm *forms.SocialMediaPostForm) {
event.PreventDefault()
formElement := env.Document.GetElementByID("smpostform").(*dom.HTMLFormElement)
postForm.SetFormParams(&isokit.FormParams{FormElement: formElement})
validationResult := postForm.Validate()
if validationResult == true {
caption := env.Document.GetElementByID("caption").(*dom.HTMLInputElement).Value
messageBody := env.Document.GetElementByID("messageBody").(*dom.HTMLTextAreaElement).Value
mood := env.Document.GetElementByID("mood").(*dom.HTMLSelectElement).Value
p := socialmedia.Post{}
p.Caption = caption
p.MessageBody = messageBody
moodValue, err := strconv.Atoi(mood)
if err != nil {
println(err)
moodValue = 0
}
p.RawMoodValue = moodValue
go SavePostRequest(env, p)
formElement.Underlying().Call("reset")
} else {
postForm.DisplayErrors()
}
}
func SavePostRequest(env *common.Env, p socialmedia.Post) {
postBytes, err := json.Marshal(p)
if err != nil {
println(err)
}
data, err := xhr.Send("POST", "/restapi/save-post", postBytes)
if err != nil {
println(err)
}
if strings.Contains(string(data), "ERROR:") {
js.Global.Get("alertify").Call("error", string(data))
} else {
js.Global.Get("alertify").Call("success", "Post saved successfully!")
PopulateFeedPosts(env)
}
}
func PopulateFeedPosts(env *common.Env) {
data, err := xhr.Send("POST", "/restapi/fetch-posts", nil)
if err != nil {
println("Encountered error while attempting to submit POST request via XHR: ", err)
println(err)
}
var posts []socialmedia.Post
json.Unmarshal(data, &posts)
for i := 0; i < len(posts); i++ {
moodValue := posts[i].RawMoodValue
posts[i].AuthorMoodEmoji = socialmedia.MoodsEmoji[socialmedia.MoodState(moodValue)]
posts[i].TimeCreated = time.Unix(int64(posts[i].TimeCreatedUnixTS), 0)
}
postsContainer := env.Document.GetElementByID("postsContainer").(*dom.HTMLDivElement)
env.TemplateSet.Render("partials/feed_posts", &isokit.RenderParams{Data: posts, Disposition: isokit.PlacementReplaceInnerContents, Element: postsContainer})
}