0bd75e7c59
Similar to the blog handler the blog user handler routes /blogs/users/{id}. Pagination is implemented as well
140 lines
3.3 KiB
Plaintext
140 lines
3.3 KiB
Plaintext
note
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description: "Request handler related to /blogs/user/{id}/. Displays all posts of the given user"
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author: "Dario Bösch <daboesch@student.ethz.ch>"
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date: "$Date: 2015-05-22 15:13:00 +0100 (lun., 18 mai 2015) $"
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revision: "$Revision 96616$"
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class
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BLOG_USER_HANDLER
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inherit
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BLOG_HANDLER
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redefine
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do_get,
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posts,
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total_entries,
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page_title_html,
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base_path
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end
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create
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make
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feature -- Global Variables
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user : detachable CMS_USER
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feature -- HTTP Methods
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do_get (req: WSF_REQUEST; res: WSF_RESPONSE)
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-- <Precursor>
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local
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l_error: GENERIC_VIEW_CMS_RESPONSE
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do
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-- Check if userID valid
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if user_valid (req) then
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user := load_user(req)
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precursor(req, res)
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else
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-- Throw a bad request error if the user is not valid
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create l_error.make (req, res, api)
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l_error.set_main_content ("<h1>Error</h1>User with id " + user_path_parameter(req).out + " doesn't exist!")
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l_error.execute
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end
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end
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feature -- Query
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user_valid (req: WSF_REQUEST) : BOOLEAN
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-- Returns true if a valid user id is given and a user with this id exists; otherwise returns false.
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local
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user_id: INTEGER_32
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do
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user_id := user_path_parameter(req)
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if user_id <= 0 then
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--Given user id is not valid
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Result := false
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else
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--Check if user with user_id exists
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Result := api.user_api.user_by_id (user_id) /= Void
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end
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end
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load_user (req: WSF_REQUEST) : detachable CMS_USER
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-- Returnes the user with the given id in the request req
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require
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user_valid(req)
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do
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Result := api.user_api.user_by_id (user_path_parameter(req))
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end
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user_path_parameter (req: WSF_REQUEST): INTEGER_32
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-- Returns the user id from the path /blogs/{user}. It's an unsigned integer since negative ids are not allowed. If no valid id can be read it returns -1
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local
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s: STRING
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do
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if attached {WSF_STRING} req.path_parameter ("user") as user_id then
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s := user_id.value
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if s.is_integer_32 then
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if s.to_integer_32 > 0 then
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Result := s.to_integer_32
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end
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end
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end
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end
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posts : LIST[CMS_NODE]
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-- The posts to list on the given page
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do
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if attached user as l_user then
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Result := node_api.blogs_from_user_order_created_desc_limited (l_user.id.to_integer_32, entries_per_page, (page_number-1) * entries_per_page)
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else
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create {ARRAYED_LIST [CMS_NODE]} Result.make (0)
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end
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end
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total_entries : NATURAL_32
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-- Returns the number of total entries/posts
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do
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if attached user as l_user then
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Result := node_api.blogs_count_from_user(l_user.id).to_natural_32
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else
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Result := precursor
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end
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end
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feature -- HTML Output
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page_title_html : STRING
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-- Returns the title of the page as a html string. It shows the current page number
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do
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create Result.make_from_string ("<h2>Posts from ")
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if attached user as l_user then
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Result.append(l_user.name)
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else
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Result.append ("unknown user")
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end
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if more_than_one_page then
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Result.append (" (Page " + page_number.out + " of " + pages.out + ")")
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-- Get the posts from the current page (limited by entries per page)
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end
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Result.append ("</h2>")
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end
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base_path : STRING
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-- the path to the page that lists all blogs
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do
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if attached user as l_user then
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Result := "/blogs/user/" + l_user.id.out
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else
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Result := precursor
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end
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end
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end
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