biawebsidebar.hpp

   1 #ifndef __BIAWEBSIDEBAR__
   2 #define __BIAWEBSIDEBAR__
   3 #include <string>
   4 #include <list>
   5 #include <iostream>
   6 #include <fstream>
   7 #include <fmt/format.h>
   8 #include "biawebutil.hpp"
   9
  10 // classes to describe the a list of (link) items and sidebar containers which form part of
  11 // main document
  12 namespace biaweb {
  13     // class to represent a generic link item which can contain a text and link or only
  14     // text
  15     class GenericLinkItem {
  16       protected:
  17         // sidebar text and url
  18         std::string itemtext;
  19         std::string itemurl;
  20       public:
  21         std::string get_item_text () {
  22             return this->itemtext;
  23         }
  24         void set_item_text (std::string text) {
  25             this->itemtext = escape_html (text);
  26         }
  27         std::string get_item_url () {
  28             return this->itemurl;
  29         }
  30         void set_item_url (std::string url) {
  31             this->itemurl = escape_html (url);
  32         }
  33         // output to HTML using a template directory specified
  34         std::string to_html (std::string templatedir);
  35
  36         GenericLinkItem (std::string text = "", std::string url = "") {
  37             this->itemtext = escape_html (text);
  38             this->itemurl = escape_html (url);
  39         }
  40     };
  41
  42     std::string GenericLinkItem::to_html (std::string templatedir) {
  43         std::string html = "";
  44         // if url is not empty it is a link item so load the sidebar link template
  45         if (! this->itemurl.empty ()) {
  46             if (!this->itemtext.empty ())
  47             {
  48                 std::ifstream tpl_linkitem (templatedir + "/genericlinklistitem.tpl.html");
  49
  50                 std::string tpl_linkitem_str ( (std::istreambuf_iterator<char> (tpl_linkitem)),
  51                                                 (std::istreambuf_iterator<char> ()));
  52                 tpl_linkitem.close ();
  53                 html = fmt::format (tpl_linkitem_str,
  54                                         fmt::arg ("itemurl", this->itemurl),
  55                                         fmt::arg ("itemtext", this->itemtext));
  56             }
  57         }
  58         // Non link item. Load the normal sidebar item template.
  59         else if (! this->itemtext.empty ())
  60         {
  61             std::ifstream tpl_item (templatedir + "/genericlistitem.tpl.html");
  62
  63             std::string tpl_item_str ( (std::istreambuf_iterator<char> (tpl_item)),
  64                                         (std::istreambuf_iterator<char> ()));
  65             tpl_item.close ();
  66             html = fmt::format (tpl_item_str, fmt::arg ("itemtext", this->itemtext) );
  67         }
  68         return html;
  69     }
  70
  71     // Class to represent a sidebar, which contains one heading and a list of items
  72     // either links or non-link items.
  73     class SideBar {
  74       protected:
  75         std::string sidebar_title;
  76         std::list <GenericLinkItem> items;
  77
  78       public:
  79         void set_title (std::string title) {
  80             this->sidebar_title = title;
  81         }
  82
  83         void add_sidebar_item (GenericLinkItem item) {
  84             this->items.insert (this->items.cend(), item);
  85         }
  86
  87         // render the sidebar using the template directory specified
  88         std::string to_html (std::string templatedir) ;
  89     };
  90
  91     // render the sidebar to HTML representation from the template.
  92     std::string SideBar::to_html (std::string templatedir) {
  93         std::ifstream sidetpl (templatedir + "/sidebar.tpl.html");
  94         std::string sidetpl_str ( ( std::istreambuf_iterator<char> (sidetpl)) ,
  95                                        (std::istreambuf_iterator<char> ()));
  96         sidetpl.close ();
  97         std::string listitems;
  98         // first get the sidebar items and render them to HTML
  99         for (GenericLinkItem item : this->items) {
 100             listitems += item.to_html (templatedir);
 101         }
 102
 103         std::string html = "";
 104         // if there are items, sidebar should be rendered otherwise not needed
 105         if (items.size () > 0)
 106             html = fmt::format (sidetpl_str,
 107                                         fmt::arg ("title", this->sidebar_title),
 108                                         fmt::arg ("items", listitems));
 109
 110         return html;
 111     }
 112 }
 113
 114 #endif