242 Zeilen
7.0 KiB
C++
242 Zeilen
7.0 KiB
C++
/* Copyright (c) 2018 Albert S.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#include <regex>
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#include <iostream>
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#include <regex>
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#include <vector>
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#include <algorithm>
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#include <iterator>
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#include "parser.h"
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#include "utils.h"
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#include "htmllink.h"
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std::vector<Headline> Parser::extractHeadlines(const std::string &content) const
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{
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std::vector<Headline> result;
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std::string reg = R"(\[h(1|2|3)\](\[.*?\])*(.*?)(\[.*?\])*\[\/h\1\])";
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std::regex headerfinder(reg);
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auto begin = std::sregex_iterator(content.begin(), content.end(), headerfinder);
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auto end = std::sregex_iterator();
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for(auto it = begin; it != end; it++)
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{
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auto smatch = *it;
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Headline h;
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h.level = utils::toUInt(smatch.str(1));
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h.title = smatch.str(3);
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result.push_back(h);
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}
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return result;
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}
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std::vector<std::string> Parser::extractCategories(const std::string &content) const
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{
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std::vector<std::string> result;
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std::string reg = R"(\[category\](.*?)\[/category\])";
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std::regex headerfinder(reg);
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auto begin = std::sregex_iterator(content.begin(), content.end(), headerfinder);
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auto end = std::sregex_iterator();
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for(auto it = begin; it != end; it++)
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{
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auto smatch = *it;
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result.emplace_back(smatch.str(1));
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}
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return result;
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}
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std::string Parser::extractFirstTag(std::string tagname, const std::string &content) const
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{
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std::string cmd = "[" + tagname + "]";
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std::string cmdend = "[/" + tagname + "]";
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std::string_view view = content;
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size_t pos = 0;
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if((pos = view.find(cmd)) != std::string::npos)
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{
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view.remove_prefix(pos);
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view.remove_prefix(cmd.size());
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if((pos = view.find(cmdend)) != std::string::npos)
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{
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auto result = view.substr(0, pos);
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return std::string{result};
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}
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}
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return "";
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}
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std::string Parser::extractCommand(std::string cmdname, const std::string &content) const
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{
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return extractFirstTag("cmd:" + cmdname, content);
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}
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std::vector<std::string> Parser::extractCommands(std::string cmdname, const std::string &content) const
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{
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std::vector<std::string> result;
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std::string cmd = "[cmd:" + cmdname + "]";
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std::string cmdend = "[/cmd:" + cmdname + "]";
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std::string_view view = content;
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size_t pos = 0;
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while((pos = view.find(cmd)) != std::string::npos)
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{
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view.remove_prefix(pos);
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view.remove_prefix(cmd.size());
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if((pos = view.find(cmdend)) != std::string::npos)
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{
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result.emplace_back(view.substr(0, pos));
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}
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}
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return result;
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}
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std::string Parser::processLink(const PageDao &pageDao, UrlProvider &urlProvider, std::smatch &match) const
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{
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std::string linktag = match.str(1);
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std::string inside = match.str(2);
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std::vector<std::string> splitted = utils::split(inside, '|');
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HtmlLink htmllink;
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if(splitted.size() == 2)
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{
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htmllink.innervalue = splitted[1];
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htmllink.href = splitted[0];
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}
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else
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{
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htmllink.innervalue = inside;
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htmllink.href = inside;
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}
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if(linktag == "wikilink")
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{
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if(pageDao.exists(htmllink.href))
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{
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htmllink.cssclass = "exists";
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}
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else
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{
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htmllink.cssclass = "notexists";
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}
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htmllink.href = urlProvider.page(htmllink.href);
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}
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return htmllink.render();
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}
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std::string Parser::processImage(std::smatch &match) const
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{
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std::string tag = match.str(1);
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std::string inside = match.str(2);
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std::vector<std::string> splitted = utils::split(inside, '|');
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std::string width;
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std::string height;
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std::string src;
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if(splitted.size() == 3)
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{
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width = splitted[0];
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height = splitted[1];
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src = splitted[2];
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}
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else
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{
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src = splitted[0];
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}
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if(!width.empty() && !height.empty())
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{
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return "<img src=\"" + src + "\" width=\"" + width + "\" height=\"" + height + "\"/>";
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}
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return "<img src=\"" + src + "\"/>";
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}
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std::string Parser::parse(const PageDao &pagedao, UrlProvider &provider, const std::string &content,
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const std::function<std::string(std::string_view, std::string_view)> &callback) const
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{
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std::string result;
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// we don't care about commands, but we nevertheless replace them with empty strings
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std::regex tagfinder(
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R"(\[(b|i|u|s|li|p|br|ul|ol|code|blockquote|img|link|wikilink|h\d|cmd:visible|cmd:listed|cmd:feedlisted|cmd:rename|cmd:redirect|cmd:pagetitle|cmd:allowinclude|cmd:permissions|cmd:parentpage|content|category|dynamic:postlist|dynamic:includepage|dynamic:getvar|dynamic:setvar)*?\]((\s|\S)*?)\[/\1](\r\n)*)");
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const std::string justreplace[] = {"b", "i", "u", "p", "br", "ul", "li", "ol"};
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result = utils::regex_callback_replacer(
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tagfinder, content,
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[&](std::smatch &match)
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{
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std::string tag = match.str(1);
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std::string content = match.str(2);
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std::string newlines = match.str(4);
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if(newlines == "\r\n")
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{
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newlines = "<br>";
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}
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if(tag != "code" && tag != "blockquote")
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{
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content = parse(pagedao, provider, content, callback);
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}
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/* [content] just helps extracting the actual content of a page, pretty much noop otherwise */
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if(tag == "content")
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{
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return parse(pagedao, provider, content, callback);
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}
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if(std::find(std::begin(justreplace), std::end(justreplace), tag) != std::end(justreplace))
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{
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if(tag == "p" || tag == "br")
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{
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newlines = "";
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}
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return "<" + tag + ">" + content + "</" + tag + ">" + newlines;
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}
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if(tag == "link" || tag == "wikilink")
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{
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return this->processLink(pagedao, provider,
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match) +
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newlines; // TODO: recreate this so we don't check inside the function stuff again
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}
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if(tag == "img")
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{
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return this->processImage(match);
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}
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if(tag[0] == 'h')
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{
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return "<" + tag + " id='" + content + "'>" + content + "</" + tag + ">";
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}
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if(tag == "code" || tag == "blockquote")
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{
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return "<pre><" + tag + ">" + utils::strreplace(content, "\r\n", "\n") + "</" + tag + "></pre>";
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}
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return callback(tag, content);
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});
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result = utils::strreplace(result, "\r\n", "<br>");
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return result;
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}
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std::string Parser::parseDynamics(const std::string &content,
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const std::function<std::string(std::string_view, std::string_view)> &callback) const
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{
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std::regex tagfinder(R"(\[(dynamic:\w+)*?\]((\s|\S)*?)\[/\1])");
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return utils::regex_callback_replacer(tagfinder, content,
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[&](std::smatch &match) { return callback(match.str(1), match.str(2)); });
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}
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