-
Notifications
You must be signed in to change notification settings - Fork 13
/
index_generator.ex
69 lines (55 loc) · 1.96 KB
/
index_generator.ex
1
2
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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
defmodule Sitemapper.IndexGenerator do
alias Sitemapper.{Encoder, File, SitemapReference}
@max_length 52_428_800
@max_count 50_000
@dec "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
@index_start "<sitemapindex xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/siteindex.xsd\" xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">"
@index_end "</sitemapindex>"
@line_sep "\n"
@line_sep_length String.length(@line_sep)
@end_length String.length(@index_end) + @line_sep_length
@max_length_offset @max_length - @end_length
def new() do
body = [@dec, @line_sep, @index_start, @line_sep]
length = IO.iodata_length(body)
%File{count: 0, length: length, body: body}
end
def add_sitemap(
%File{count: count, length: length, body: body},
%SitemapReference{} = reference
) do
element =
sitemap_element(reference)
|> XmlBuilder.generate()
element_length = IO.iodata_length(element)
new_length = length + element_length + @line_sep_length
new_count = count + 1
cond do
new_length >= @max_length_offset ->
{:error, :over_length}
new_count > @max_count ->
{:error, :over_count}
true ->
new_body = [body, element, @line_sep]
%File{count: new_count, length: new_length, body: new_body}
end
end
def finalize(%File{count: count, length: length, body: body}) do
new_body = [body, @index_end, @line_sep]
new_length = length + @end_length
%File{count: count, length: new_length, body: new_body}
end
defp sitemap_element(%SitemapReference{} = reference) do
elements =
[:loc, :lastmod]
|> Enum.reduce([], fn k, acc ->
case Map.get(reference, k) do
nil ->
acc
v ->
acc ++ [{k, Encoder.encode(v)}]
end
end)
XmlBuilder.element(:sitemap, elements)
end
end