Class: HypeAssets::HypeTemplate

Inherits:
Object
  • Object
show all
Defined in:
lib/hype_assets/hype_template.rb

Class Method Summary collapse

Class Method Details

.asset_url(resource) ⇒ Object 



70
71
72
73
74
 
# File 'lib/hype_assets/hype_template.rb', line 70

def self.asset_url (resource)
### Wrapper function around the Sprockets helper,
### since it's not clear how best to invoke it.
  ApplicationController.helpers.asset_url resource
end

.call(input) ⇒ Object 



3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/hype_assets/hype_template.rb', line 3

def self.call (input)
### Massage the raw foo.hyperesources/foo_hype_generated_script.js.hype file
### to use digested filenames, stored potentially on a CDN.
### @input [Hash] See http://www.rubydoc.info/gems/sprockets/3.5.2#Processor_Interface
###   for a description of input's fields.
### @returns [String or Hash] see sprockets README
puts "HypeAssets: Processing #{input[:name]} @ #{Time.now}"
  hype_script = input[:data]
  folder = nil

  ## THE BASE URL:
  ## Replace: var f="animation_name.hyperesources"
  ## With:    var f="https://my.cdn.com/assets/animation_name.hyperesources"
  hype_script.sub!(/var f="([^"]+)"/) {
    folder = $1
    ## TODO: Don't hardcode `assets`.  Get it dynamically from the config.
    path = asset_url "assets/#{folder}"
    %Q[var f="#{path}"]
  }


  ## The HYPE Library:
  ## Replace: "HYPE-466.full.min.js":"HYPE-466.thin.min.js"
  ## With:    "HYPE-466.full.min-1234567890abcdef.js":"HYPE-466.thin.min-1234567890abcdef.js"
  hype_script.sub!(/"(HYPE-\d+.full.min.js)":"(HYPE-\d+.thin.min.js)"/) {
    full = digested_asset_filename "#{folder}/#{$1}"
    thin = digested_asset_filename "#{folder}/#{$2}"
    %Q["#{full}":"#{thin}"]
  }


  ## INDIVIDUAL FILENAMES:
  ## Replace: n:"my_image.png"
  ## With:    n:"my_image-1234567890abcdef.png"
  ## TODO: A big difficulty here is choosing which instances of `n:""` to modify:
  ##   n is used both for filenames and for free-form, scene names.
  ##   Currently, I assume the filenames have a dot (reasonable, because they have extensions)
  ##   and that scene names do not (not so reasonable, since a human types them in).
  ##   With tighter pattern matching, we may be able to support scene-names containing dots.
  ##   For example, all the filenames are grouped together in a hash which is the third
  ##   argument to `new HYPE_466()`.   Of course, that could change from version to version
  ##   of Hype!
  hype_script.gsub!(/\bn:"([^"]+\.[^"]+)"/) {
    n = digested_asset_filename "#{folder}/#{$1}"
    %Q[n:"#{n}"]
  }

  "// Pre-Processed with HypeAssets v#{::HypeAssets::VERSION} @ #{Time.now}\n#{hype_script}"
end

.digest_path(resource) ⇒ Object 



77
78
79
80
81
82
83
 
# File 'lib/hype_assets/hype_template.rb', line 77

def self.digest_path (resource)
### Wrapper function around the Sprockets helper,
### since it's not clear how best to invoke it.
  ## To ensure we have the digested version of the filename,
  ## we have to load the Sprockets::Asset into memory.
  Rails.application.assets.find_asset(resource).digest_path
end

.digested_asset_filename(resource) ⇒ Object 



54
55
56
57
58
59
60
61
62
63
64
65
66
67
 
# File 'lib/hype_assets/hype_template.rb', line 54

def self.digested_asset_filename (resource)
### @returns the digested version of an asset's filename.
### It returns *just* the filename itself (i.e. the basename),
### since Hype's script internally concatenates the filename
### onto a base URL.
  ### NOTE: The Hype *_hype_generated_script.js percent-encodes the filename.
  ### Incidentally, it encodes `@`, even though this is a safe character, AFAICT.
  ### URI.encode does *not* re-encode the `@`, but that doesn't seem to break things.

  decoded_resource = URI.decode    resource
  digested_path    = digest_path   decoded_resource
  basename         = File.basename digested_path
  re_encoded_name  = URI.encode    basename
end