79 lines
2.5 KiB
Ruby
79 lines
2.5 KiB
Ruby
module Paginators
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class Base < Presenter
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def sequential_pagination_html(template)
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html = "<menu>"
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prev_url = template.request.env["HTTP_REFERER"]
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next_url = sequential_link(template)
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html << %{<li><a href="#{prev_url}">« Previous</a></li>}
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if post_set.posts.any?
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html << %{<li><a href="#{next_url}">Next »</a></li>}
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end
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html << "</menu>"
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html.html_safe
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end
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def numbered_pagination_html(template)
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html = "<menu>"
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window = 3
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if total_pages <= (window * 2) + 5
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1.upto(total_pages) do |page|
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html << numbered_pagination_item(template, page, current_page)
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end
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elsif current_page <= window + 2
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1.upto(current_page + window) do |page|
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html << numbered_pagination_item(template, page, current_page)
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end
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html << numbered_pagination_item(template, "...", current_page)
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html << numbered_pagination_item(template, total_pages, current_page)
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elsif current_page >= total_pages - (window + 1)
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html << numbered_pagination_item(template, 1, current_page)
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html << numbered_pagination_item(template, "...", current_page)
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(current_page - window).upto(total_pages) do |page|
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html << numbered_pagination_item(template, page, current_page)
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end
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else
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html << numbered_pagination_item(template, 1, current_page)
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html << numbered_pagination_item(template, "...", current_page)
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(current_page - window).upto(current_page + window) do |page|
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html << numbered_pagination_item(template, page, current_page)
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end
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html << numbered_pagination_item(template, "...", current_page)
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html << numbered_pagination_item(template, total_pages, current_page)
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end
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html << "</menu>"
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html.html_safe
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end
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protected
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def numbered_pagination_item(template, page, current_page)
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html = "<li>"
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if page == "..."
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html << "..."
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elsif page == current_page
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html << page.to_s
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else
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html << paginated_link(template, page)
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end
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html << "</li>"
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html.html_safe
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end
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def total_pages
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raise NotImplementedError
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end
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def current_page
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raise NotImplementedError
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end
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def sequential_link(template)
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raise NotImplementedError
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end
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def paginated_link(template, page)
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raise NotImplementedError
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end
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end
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end
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