// errHandler renders an error using error templates if available
func errHandler(context router.Context, e error) {
// Cast the error to a status error if it is one, if not wrap it in a Status 500 error
err := router.ToStatusError(e)
view := view.New(context)
view.AddKey("title", err.Title)
view.AddKey("message", err.Message)
if !context.Production() {
view.AddKey("status", err.Status)
view.AddKey("file", err.FileLine())
view.AddKey("error", err.Err)
}
view.Template("app/views/error.html.got")
// Log 404 as info only
if err.Status == 404 {
context.Logf("#info %s\n", err)
} else {
context.Logf("#error %s\n", err)
}
view.Render()
}
// HandleShow displays a single story
func HandleShow(context router.Context) error {
// Find the story
story, err := stories.Find(context.ParamInt("id"))
if err != nil {
return router.InternalError(err)
}
// Redirect requests to the canonical url
if context.Path() != story.URLShow() {
return router.Redirect(context, story.URLShow())
}
// Find the comments for this story
// Fetch the comments
q := comments.Where("story_id=?", story.Id).Order(comments.RankOrder)
rootComments, err := comments.FindAll(q)
if err != nil {
return router.InternalError(err)
}
// Render the template
view := view.New(context)
view.AddKey("story", story)
view.AddKey("meta_title", story.Name)
view.AddKey("meta_desc", story.Summary)
view.AddKey("meta_keywords", story.Name)
view.AddKey("comments", rootComments)
return view.Render()
}
// HandleHome displays a list of stories using gravity to order them
// used for the home page for gravity rank see votes.go
func HandleHome(context router.Context) error {
// Build a query
q := stories.Query().Limit(listLimit)
// Select only above 0 points, Order by rank, then points, then name
q.Where("points > 0").Order("rank desc, points desc, id desc")
// Fetch the stories
results, err := stories.FindAll(q)
if err != nil {
return router.InternalError(err)
}
// Render the template
view := view.New(context)
view.AddKey("stories", results)
view.AddKey("meta_title", "Golang News")
view.AddKey("meta_desc", "News for Go Hackers, in the style of Hacker News. A curated selection of the latest links about the Go programming language.")
view.AddKey("meta_keywords", "golang news, blog, links, go developers, go web apps, web applications, fragmenta")
view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))
view.Template("stories/views/index.html.got")
return view.Render()
}
// HandleCreateShow serves the create form via GET for posts
func HandleCreateShow(context router.Context) error {
// Authorise
err := authorise.Path(context)
if err != nil {
return router.NotAuthorizedError(err)
}
// Find users for author details
users, err := users.FindAll(users.Admins())
if err != nil {
return router.NotFoundError(err)
}
// Render the template
view := view.New(context)
post := posts.New()
user := authorise.CurrentUser(context)
if user != nil {
post.AuthorId = user.Id
}
view.AddKey("post", post)
view.AddKey("users", users)
return view.Render()
}
// HandleIndex serves a get request at /pages
func HandleIndex(context router.Context) error {
// Authorise
err := authorise.Path(context)
if err != nil {
return router.NotAuthorizedError(err)
}
// Fetch the pages
q := pages.Query().Order("url asc")
// Filter if necessary
filter := context.Param("filter")
if len(filter) > 0 {
filter = strings.Replace(filter, "&", "", -1)
filter = strings.Replace(filter, " ", "", -1)
filter = strings.Replace(filter, " ", " & ", -1)
q.Where("(to_tsvector(name) || to_tsvector(summary) || to_tsvector(url) @@ to_tsquery(?) )", filter)
}
pageList, err := pages.FindAll(q)
if err != nil {
context.Logf("#error Error indexing pages %s", err)
return router.InternalError(err)
}
// Serve template
view := view.New(context)
view.AddKey("filter", filter)
view.AddKey("pages", pageList)
return view.Render()
}
// HandleHome displays a list of stories using gravity to order them
// used for the home page for gravity rank see votes.go
// responds to GET /
func HandleHome(context router.Context) error {
// Build a query
q := stories.Query().Limit(listLimit)
// Select only above 0 points, Order by rank, then points, then name
q.Where("points > 0").Order("rank desc, points desc, id desc")
// Set the offset in pages if we have one
page := int(context.ParamInt("page"))
if page > 0 {
q.Offset(listLimit * page)
}
// Fetch the stories
results, err := stories.FindAll(q)
if err != nil {
return router.InternalError(err)
}
// Render the template
view := view.New(context)
setStoriesMetadata(view, context.Request())
view.AddKey("page", page)
view.AddKey("stories", results)
view.Template("stories/views/index.html.got")
if context.Param("format") == ".xml" {
view.Layout("")
view.Template("stories/views/index.xml.got")
}
return view.Render()
}
// HandleHome serves a get request at /
func HandleHome(context router.Context) error {
// Setup context for template
view := view.New(context)
// Authorise
err := authorise.Path(context)
if err != nil {
return router.NotAuthorizedError(err)
}
// If nothing exists, redirect to set up page
if missingUsersAndPages() {
return router.Redirect(context, "/fragmenta/setup")
}
page, err := pages.Find(1)
if err != nil {
return router.InternalError(err)
}
view.AddKey("page", page)
view.AddKey("meta_title", page.Name)
view.AddKey("meta_desc", page.Summary)
view.AddKey("meta_keywords", page.Keywords)
return view.Render()
}
// HandleShow serve a get request at /users/1
func HandleShow(context router.Context) error {
// Find the user
user, err := users.Find(context.ParamInt("id"))
if err != nil {
context.Logf("#error parsing user id: %s", err)
return router.NotFoundError(err)
}
userMeta := fmt.Sprintf("%s – %s", user.Name, user.Summary)
// Set up view
view := view.New(context)
// Find the first image which matches this user
image, err := images.Find(user.ImageID)
if err == nil {
// only add image key if we have one
view.AddKey("image", image)
}
// Render the Template
view.AddKey("user", user)
view.AddKey("meta_title", userMeta)
view.AddKey("meta_desc", userMeta)
view.AddKey("meta_keywords", user.Keywords())
return view.Render()
}
// errHandler renders an error using error templates if available
func errHandler(context router.Context, e error) {
// Cast the error to a status error if it is one, if not wrap it in a Status 500 error
err := router.ToStatusError(e)
view := view.New(context)
view.AddKey("title", err.Title)
view.AddKey("message", err.Message)
if !context.Production() {
view.AddKey("status", err.Status)
view.AddKey("file", err.FileLine())
view.AddKey("error", err.Err)
}
// Set the status correctly for errors
context.Writer().WriteHeader(err.Status)
// Use our error template
view.Template("app/views/error.html.got")
context.Logf("#error %s\n", err)
view.Render()
}
// HandleUpdateShow renders the form to update a post
func HandleUpdateShow(context router.Context) error {
// Find the post
post, err := posts.Find(context.ParamInt("id"))
if err != nil {
return router.NotFoundError(err)
}
// Authorise update post
err = authorise.Resource(context, post)
if err != nil {
return router.NotAuthorizedError(err)
}
// Find users for author details
users, err := users.FindAll(users.Admins())
if err != nil {
return router.NotFoundError(err)
}
// Render the template
view := view.New(context)
view.AddKey("post", post)
view.AddKey("users", users)
return view.Render()
}
// Serve a get request at /images
//
//
func HandleIndex(context router.Context) error {
// Authorise
err := authorise.Path(context)
if err != nil {
return router.NotAuthorizedError(err)
}
// Setup context for template
view := view.New(context)
// Build a query
q := images.Query()
// Show only published (defaults to showing all)
// q.Apply(status.WherePublished)
// Order by required order, or default to id asc
switch context.Param("order") {
case "1":
q.Order("created_at desc")
case "2":
q.Order("updated_at desc")
case "3":
q.Order("name asc")
default:
q.Order("id desc")
}
// Filter if necessary - this assumes name and summary cols
filter := context.Param("filter")
if len(filter) > 0 {
filter = strings.Replace(filter, "&", "", -1)
filter = strings.Replace(filter, " ", "", -1)
filter = strings.Replace(filter, " ", " & ", -1)
q.Where("( to_tsvector(name) || to_tsvector(summary) @@ to_tsquery(?) )", filter)
}
// Fetch the images
imagesList, err := images.FindAll(q)
if err != nil {
return router.InternalError(err)
}
// Serve template
view.AddKey("filter", filter)
view.AddKey("images", imagesList)
// Can we add these programatically?
view.AddKey("admin_links", helpers.Link("Create image", images.New().URLCreate()))
return view.Render()
}
// render the given page, with metadata set
func render(context router.Context, page *pages.Page) error {
// Render the template
view := view.New(context)
view.AddKey("page", page)
view.AddKey("page", page)
view.AddKey("meta_title", page.Name)
view.AddKey("meta_desc", page.Summary)
view.AddKey("meta_keywords", page.Keywords)
view.Template("pages/views/show.html.got")
return view.Render()
}
// HandleIndex displays a list of stories at /stories
func HandleIndex(context router.Context) error {
// Build a query
q := stories.Query().Limit(listLimit)
// Order by date by default
q.Where("points > -6").Order("created_at desc")
// Filter if necessary - this assumes name and summary cols
filter := context.Param("q")
if len(filter) > 0 {
// Replace special characters with escaped sequence
filter = strings.Replace(filter, "_", "\\_", -1)
filter = strings.Replace(filter, "%", "\\%", -1)
wildcard := "%" + filter + "%"
// Perform a wildcard search for name or url
q.Where("stories.name ILIKE ? OR stories.url ILIKE ?", wildcard, wildcard)
// If filtering, order by rank, not by date
q.Order("rank desc, points desc, id desc")
}
// Set the offset in pages if we have one
page := int(context.ParamInt("page"))
if page > 0 {
q.Offset(listLimit * page)
}
// Fetch the stories
results, err := stories.FindAll(q)
if err != nil {
return router.InternalError(err)
}
// Render the template
view := view.New(context)
setStoriesMetadata(view, context.Request())
view.AddKey("page", page)
view.AddKey("stories", results)
if context.Param("format") == ".xml" {
view.Layout("")
view.Template("stories/views/index.xml.got")
}
return view.Render()
}
// HandleCreateShow handles GET users/create
func HandleCreateShow(context router.Context) error {
// No auth as anyone can create users in this app
// Setup
view := view.New(context)
user := users.New()
view.AddKey("user", user)
view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))
// Serve
return view.Render()
}
// HandleIndex displays a list of posts
func HandleIndex(context router.Context) error {
// Authorise
err := authorise.Path(context)
if err != nil {
return router.NotAuthorizedError(err)
}
// Build a query
q := posts.Query()
// Order by required order, or default to id asc
switch context.Param("order") {
case "1":
q.Order("created desc")
case "2":
q.Order("updated desc")
case "3":
q.Order("name asc")
default:
q.Order("id asc")
}
// Filter if necessary - this assumes name and summary cols
filter := context.Param("filter")
if len(filter) > 0 {
filter = strings.Replace(filter, "&", "", -1)
filter = strings.Replace(filter, " ", "", -1)
filter = strings.Replace(filter, " ", " & ", -1)
q.Where("( to_tsvector(name) || to_tsvector(summary) @@ to_tsquery(?) )", filter)
}
// Fetch the posts
results, err := posts.FindAll(q)
if err != nil {
return router.InternalError(err)
}
// Render the template
view := view.New(context)
view.AddKey("filter", filter)
view.AddKey("posts", results)
return view.Render()
}
// HandleIndex displays a list of files
func HandleIndex(context router.Context) error {
// Authorise
err := authorise.Path(context)
if err != nil {
return router.NotAuthorizedError(err)
}
// Find the current user and check status
u := authorise.CurrentUser(context)
if u.Anon() {
// return router.NotAuthorizedError(err)
}
// For admins, show all files, order by date desc
q := files.Query().Order("updated_at desc")
// otherwise show just the logged in user's files
if !u.Admin() {
// Find the files for this user, unless
q = files.Where("user_id=?", u.Id)
}
// Fetch the files
results, err := files.FindAll(q)
if err != nil {
return router.InternalError(err)
}
// Render the template
view := view.New(context)
view.AddKey("files", results)
return view.Render()
}
// HandleShowHome serves our home page
func homeHandler(context router.Context) error {
view := view.New(context)
view.AddKey("title", "Fragmenta app")
view.Template("app/views/home.html.got")
return view.Render()
}
// HandleCreateShow serves the create form via GET for stories
func HandleCreateShow(context router.Context) error {
// Authorise
err := authorise.Path(context)
if err != nil {
return router.NotAuthorizedError(err)
}
// Render the template
view := view.New(context)
story := stories.New()
view.AddKey("story", story)
view.AddKey("meta_title", "Go Hacker News Submit")
view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))
return view.Render()
}
// HandleShow displays a single comment
func HandleShow(context router.Context) error {
// Find the comment
comment, err := comments.Find(context.ParamInt("id"))
if err != nil {
return router.InternalError(err)
}
// No auth as all are public - if we restricted by status we might need to authorise here
// Render the template
view := view.New(context)
view.AddKey("comment", comment)
view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))
return view.Render()
}
// HandleUpvoted displays a list of stories the user has upvoted in the past
func HandleUpvoted(context router.Context) error {
// Build a query
q := stories.Query().Limit(listLimit)
// Select only above 0 points, Order by rank, then points, then name
q.Where("points > 0").Order("rank desc, points desc, id desc")
// Select only stories which the user has upvoted
user := authorise.CurrentUser(context)
if !user.Anon() {
// Can we use a join instead?
v := query.New("votes", "story_id").Select("select story_id as id from votes").Where("user_id=? AND story_id IS NOT NULL AND points > 0", user.Id)
storyIDs := v.ResultIDs()
if len(storyIDs) > 0 {
q.WhereIn("id", storyIDs)
}
}
// Set the offset in pages if we have one
page := int(context.ParamInt("page"))
if page > 0 {
q.Offset(listLimit * page)
}
// Fetch the stories
results, err := stories.FindAll(q)
if err != nil {
return router.InternalError(err)
}
// Render the template
view := view.New(context)
setStoriesMetadata(view, context.Request())
view.AddKey("page", page)
view.AddKey("stories", results)
view.Template("stories/views/index.html.got")
if context.Param("format") == ".xml" {
view.Layout("")
view.Template("stories/views/index.xml.got")
}
return view.Render()
}
// HandleCreateShow serves the create form via GET for stories
func HandleCreateShow(context router.Context) error {
// Authorise
err := authorise.Path(context)
if err != nil {
// When not allowed to post stories, redirect to register screen
router.Redirect(context, "/users/create")
}
// Render the template
view := view.New(context)
story := stories.New()
view.AddKey("story", story)
view.AddKey("meta_title", "Go Hacker News Submit")
return view.Render()
}
// HandleCreateShow serves the create form via GET for users
func HandleCreateShow(context router.Context) error {
// Render the template
view := view.New(context)
user := users.New()
view.AddKey("user", user)
return view.Render()
}
// HandleCreateShow serves the create form via GET for comments
func HandleCreateShow(context router.Context) error {
// Authorise
err := authorise.Path(context)
if err != nil {
return router.NotAuthorizedError(err)
}
// Render the template
view := view.New(context)
comment := comments.New()
view.AddKey("comment", comment)
// TODO: May have to validate parent_id or story_id
view.AddKey("story_id", context.ParamInt("story_id"))
view.AddKey("parent_id", context.ParamInt("parent_id"))
view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))
return view.Render()
}
// HandleUpdateShow serves a get request at /users/1/update (show form to update)
func HandleUpdateShow(context router.Context) error {
// Setup context for template
view := view.New(context)
user, err := users.Find(context.ParamInt("id"))
if err != nil {
context.Logf("#error Error finding user %s", err)
return router.NotFoundError(err)
}
// Authorise
err = authorise.Resource(context, user)
if err != nil {
return router.NotAuthorizedError(err)
}
view.AddKey("user", user)
view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))
return view.Render()
}
// HandleLoginShow shows the page at /users/login
func HandleLoginShow(context router.Context) error {
// Setup context for template
view := view.New(context)
// Check we're not already logged in, if so redirect with a message
// we could alternatively display an error here?
if !authorise.CurrentUser(context).Anon() {
return router.Redirect(context, "/?warn=already_logged_in")
}
switch context.Param("error") {
case "failed_email":
view.AddKey("warning", "Sorry, we couldn't find a user with that email.")
case "failed_password":
view.AddKey("warning", "Sorry, the password was incorrect, please try again.")
}
// Serve
return view.Render()
}
func renderPage(context router.Context, page *pages.Page) error {
view := view.New(context)
// Setup context for template
if page.Template != "" {
view.Template(page.Template)
} else {
view.Template("pages/views/show.html.got")
}
view.AddKey("page", page)
view.AddKey("meta_title", page.Name)
view.AddKey("meta_desc", page.Summary)
view.AddKey("meta_keywords", page.Keywords)
// Serve template
context.Logf("#info Rendering page for path %s", context.Path())
return view.Render()
}
// HandleUpdateShow renders the form to update a story
func HandleUpdateShow(context router.Context) error {
// Find the story
story, err := stories.Find(context.ParamInt("id"))
if err != nil {
return router.NotFoundError(err)
}
// Authorise update story
err = authorise.Resource(context, story)
if err != nil {
return router.NotAuthorizedError(err)
}
// Render the template
view := view.New(context)
view.AddKey("story", story)
view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))
return view.Render()
}
// HandleUpdateShow serves a get request at /images/1/update (show form to update)
func HandleUpdateShow(context router.Context) error {
// Setup context for template
view := view.New(context)
image, err := images.Find(context.ParamInt("id"))
if err != nil {
context.Logf("#error Error finding image %s", err)
return router.NotFoundError(err)
}
// Authorise
err = authorise.Resource(context, image)
if err != nil {
return router.NotAuthorizedError(err)
}
view.AddKey("redirect", context.Param("redirect"))
view.AddKey("image", image)
return view.Render()
}
// HandleCode displays a list of stories linking to repos (github etc) using gravity to order them
// responds to GET /stories/code
func HandleCode(context router.Context) error {
// Build a query
q := stories.Query().Where("points > -6").Order("rank desc, points desc, id desc").Limit(listLimit)
// Restrict to stories with have a url starting with github.com or bitbucket.org
// other code repos can be added later
q.Where("url ILIKE 'https://github.com%'").OrWhere("url ILIKE 'https://bitbucket.org'")
// Set the offset in pages if we have one
page := int(context.ParamInt("page"))
if page > 0 {
q.Offset(listLimit * page)
}
// Fetch the stories
results, err := stories.FindAll(q)
if err != nil {
return router.InternalError(err)
}
// Render the template
view := view.New(context)
setStoriesMetadata(view, context.Request())
view.AddKey("page", page)
view.AddKey("stories", results)
// view.AddKey("tags", []string{"web", "mobile", "data", "email", "crypto", "data", "graphics", "ui", "security"})
// TODO: remove these calls and put in a filter
// - given it is not too expensive, we could just generate tokens on every request
view.Template("stories/views/index.html.got")
if context.Param("format") == ".xml" {
view.Layout("")
view.Template("stories/views/index.xml.got")
}
return view.Render()
}
// HandleShow serve a get request at /users/1
func HandleShow(context router.Context) error {
// No auth - this is public
// Find the user
user, err := users.Find(context.ParamInt("id"))
if err != nil {
context.Logf("#error parsing user id: %s", err)
return router.NotFoundError(err)
}
// Set up view
view := view.New(context)
// Render the Template
view.AddKey("user", user)
view.AddKey("meta_title", user.Name)
view.AddKey("meta_desc", user.Name)
return view.Render()
}