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Added application and source documentation.

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Paul van Tilburg 2010-09-12 13:56:24 +02:00
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
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the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
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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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
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Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
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mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

62
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= Plemp!
Create your own online pile of junk! Plemp allows you to upload/put stuff
on a single canvas, for sharing, collaging or any purpose you can think of.
== Features
* Uploading of image/music/video/text files
* Adding content by means of pasting text
* Syntax highlighting of source code files
* (Re)arranging of the files
* Some visual effects for eye candy purposes
* Distributed management of the arrangement, i.e. everybody viewing the
Plemp page will (with some delay) see the same arrangement
== Requirements
Plemp! is an Camping application, so you need:
* Ruby 1.8 (>= 1.8.6) or 1.9 (>= 1.9.1)
* Camping (>= 2.0)
* Active Record (>= 2.3)
* Markaby, and optionally:
* Mongrel
The following Ruby librares are required:
* CodeRay
* JSON
* MIME-Types
and the following JavaScript libraries:
* Prototype (>= 1.6)
* Script.aculo.us (>= 1.8)
== Installation
For now, Plemp! is in a developing state and not ready for site-wide
deployment yet. However, before running, make sure that prototype.js and
all JavaScript files from Script.aculo.us are available from public/ either
by copying or symlinking them there.
== Usage
Run from the command line:
$ camping plemp.rb
and head over to http://localhost:3301/ to view and use the Plemp! canvas.
Files can be upload or text can be pasted using the Add/Upload Dialog
invoked by pressing the Plus key or the Plus button in the top-right
corner. Once uploaded, the objects can be arranged by dragging them
around.
== License
Plemp! 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 2 of the License, or
(at your option) any later version.

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Plemp! ToDo
===========
* Comments
* Titles per object
* Drag&drop uploading
* Arbitrary file support
* Object features:
- Removal
- Metadata exposure
- Downloading of original version
- Resizing
* On hover bar showing the object features
* Working video support

135
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@ -1,3 +1,12 @@
# plemp.rb - The Plemp! application, create your own on-line pile of junk!
#
# Plemp! is Copyright © 2010 Paul van Tilburg <paul@luon.net>
#
# 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 2 of the License, or (at your option) any later
# version.
require "active_record"
require "camping"
require "coderay"
@ -9,7 +18,10 @@ require "pathname"
Camping.goes :Plemp
# We want (somewhat) indent HTML to be produced.
Markaby::Builder.set(:indent, 2)
# Global variables.
unless defined? BASE_DIR
BASE_DIR = Pathname.new(__FILE__).dirname
PUBLIC_DIR = BASE_DIR + "public"
@ -19,25 +31,35 @@ unless defined? BASE_DIR
Version = "0.1"
end
# = The Plemp module
module Plemp
# Calls methods at application creation/setup time.
def self.create
Plemp::Models.create_schema
end
end
# = The Plemp models
module Plemp::Models
# = The draggable model class
#
# This class represents an draggable object attached to an uploaded
# file.
class Draggable < Base
end
# = The basic fields class
#
# Class that connects model classes to database tables.
class BasicFields < V 1.0
def self.up
create_table Draggable.table_name do |d|
d.string :file
d.integer :left, :top, :z_index
# This gives us created_at and updated_at
# This gives us created_at and updated_at.
d.timestamps
end
end
@ -46,18 +68,36 @@ module Plemp::Models
drop_table Draggable.table_name
end
end
end
end # module Plemp::Models
# = The Plemp controllers
module Plemp::Controllers
# = The index controller
#
# Main controller that shows the canvas with the draggable objects.
#
# path:: /
# view:: Views#main
class Index
# Retrieves all draggables and renders the main view.
def get
@draggables = Draggable.all
render :main
end
end
# = The current controller
#
# Controller accessed through AJAX requests by the main page for getting
# the current (global) state (position) of the draggables.
#
# path:: /current
# view:: N/A
class Current
# Retrieves all draggables with there top/left position and returns
# an Hash in JSON format.
def get
out = Hash.new
Draggable.all.each { |d| out[d.file] = [d.left, d.top] }
@ -66,7 +106,40 @@ module Plemp::Controllers
end
end
# = The position save controller
#
# Controller used through AJAX request by the main page for committing
# position changes of the draggables to the database, i.e. the global
# state.
#
# path:: /savepos/<id>/<top>/<left>
# view:: N/A
class SaveposXXX
# Retrieves the draggable _file_ from the database and updates its
# _top_ and _left_ position.
def post(file, top, left)
[top, left].each { |pos| pos.gsub!(/px$/, '') }
$stderr.puts("Got: file id: #{file} -> top: #{top}, left: #{left}")
drag = Draggable.find_by_file(file)
drag.top = top
drag.left = left
drag.save
""
end
end
# = The static controller
#
# Controller to serve static data from either the public or upload
# subdirectory using X-Sendfile.
#
# path:: /static/(public,upload)/<file>
# view:: N/A (X-Sendfile)
class StaticXX
# Determines the MIME type of the file referenced by _path_ and sets
# the suitable headers and X-Sendfile header. The _type_ can be either
# _public_ if the file came with Plemp!, or _upload_ if the file was
# once uploaded to Plemp!.
def get(type, path)
mime_type = MIME::Types.type_for(path).first
@headers['Content-Type'] = mime_type.nil? ? "text/plain" : mime_type.to_s
@ -79,21 +152,24 @@ module Plemp::Controllers
end
end
class SaveposXXX
def post(file, top, left)
[top, left].each { |pos| pos.gsub!(/px$/, '') }
$stderr.puts("Got: file id: #{file} -> top: #{top}, left: #{left}")
drag = Draggable.find_by_file(file)
drag.top = top
drag.left = left
drag.save
""
end
end
# = The upload controller
#
# Controller to handle uploads from the main site. This can either
# be a file or some pasted text. After upload the controler redirects
# to the main page which includes the just uploaded file.
#
# path:: /upload
# redirect:: Index
class Upload
# Creates a text file from input text or otherise from the supplied
# uploaded temp file. The file name is base on the current timestamp
# plus the appropriate extension. Also creates an Draggable object in
# the database.
def post
# TODO: store the MIME type in the database!
# TODO: in case of text + filename, commit both.
if @input.text.empty?
# Text input has priority over file uploads.
orig_ext = File.extname(@input.file[:filename]).downcase
file_base = Time.now.strftime("%Y%m%d%H%M%S#{orig_ext}")
contents = @input.file[:tempfile].read
@ -111,10 +187,13 @@ module Plemp::Controllers
end
end
end
end # module Plemp::Controllers
# The Plemp views
module Plemp::Views
# The main layout used by Controllers::*#render. Loads the appropriate
# style and JavaScript files.
def layout
xhtml_strict do
head do
@ -129,12 +208,15 @@ module Plemp::Views
"init_plemp();"
end
end
# TODO: move this to init_plemp()?
body(:onLoad => "return setup_draggables();") do
self << yield
end
end
end
# The main view. Shows the header, the (hidden) add_dialog and the
# cavnas with the draggable objects.
def main
div.header! do
h1 do
@ -142,6 +224,13 @@ module Plemp::Views
div.add!(:onClick => "show_add_dialog(); return false;") { "+" }
end
end
add_dialog
draggables
end
# The add dialog. A hidden dialog only shown when the Plus button/key
# is used. Uses Controllers::Upload to upload a file or pasted text.
def add_dialog
div.add_dialog!(:style => "display:none;") do
div.background {}
form :action => R(Upload), :method => "post", :id => "add_form",
@ -160,18 +249,28 @@ module Plemp::Views
end
end
end
end
# The canvas with draggables. Creates a draggable HTML element including
# the actually contents of the associated file per Draggable object in
# the database.
def draggables
div.draggables! do
@draggables.each do |d|
file = UPLOAD_DIR + d.file
unless file.exist?
# The associated file of this Draggable object is gone, remove
# the object from the database too.
d.destroy
next
end
# Determine the MIME type.
file_type = `file --brief --mime-type #{file}`.chomp
mime_type = MIME::Types[file_type].first
if mime_type.nil?
mime_type = MIME::Type.new(file_type)
end
# Create an HTML element based on the type of the Draggable object.
default_style = "left:#{d.left}px;top:#{d.top}px;z-index:0;display:none"
case mime_type.media_type
when "image"
@ -201,9 +300,9 @@ module Plemp::Views
span.draggable :id => d.file, :style => default_style do
em "#{d.file}: Unsupported file type!"
end
end # case
end
end
end
end
end # def draggables
end
end # module Plemp::Views