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<title>mastodon-cpp: example14_easy_treeview.cpp</title>
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<div id="projectname">mastodon-cpp
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 <span id="projectnumber">0.30.1</span>
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<div class="title">example14_easy_treeview.cpp</div> </div>
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<div class="fragment"><div class="line"><span class="comment">/* This file is part of mastodon-cpp.</span></div><div class="line"><span class="comment"> * Prints a Mastodon-conversation in a tree.</span></div><div class="line"><span class="comment"> * Argument has to be in the form: https://<domain>/<user>/<status id></span></div><div class="line"><span class="comment"> * </span></div><div class="line"><span class="comment"> * This example uses a rather wasteful approach in order to use less code and</span></div><div class="line"><span class="comment"> * therefore be more clear. Please don't use it on long conversations.</span></div><div class="line"><span class="comment"> */</span></div><div class="line"></div><div class="line"><span class="comment">// Don't compile this if the Easy-interface is turned off</span></div><div class="line"><span class="preprocessor">#ifndef WITHOUT_EASY</span></div><div class="line"></div><div class="line"><span class="preprocessor">#include <iostream></span></div><div class="line"><span class="preprocessor">#include <string></span></div><div class="line"><span class="preprocessor">#include <thread></span></div><div class="line"><span class="preprocessor">#include <chrono></span></div><div class="line"><span class="preprocessor">#include <ctime></span></div><div class="line"><span class="preprocessor">#include <regex></span></div><div class="line"></div><div class="line"><span class="comment">// If we are compiling mastodon-cpp, use another include path</span></div><div class="line"><span class="preprocessor">#ifdef MASTODON_CPP</span></div><div class="line"><span class="preprocessor"> #include "mastodon-cpp.hpp"</span></div><div class="line"><span class="preprocessor"> #include "easy/all.hpp"</span></div><div class="line"><span class="preprocessor">#else</span></div><div class="line"><span class="preprocessor"> #include <mastodon-cpp/mastodon-cpp.hpp></span></div><div class="line"> <span class="comment">// Include all headers in mastodon-cpp/easy/</span></div><div class="line"><span class="preprocessor"> #include <mastodon-cpp/easy/all.hpp></span></div><div class="line"><span class="preprocessor">#endif</span></div><div class="line"></div><div class="line"><span class="keyword">using</span> <a name="_a0"></a><a class="code" href="classMastodon_1_1API.html">Mastodon::API</a>;</div><div class="line"><span class="keyword">using</span> <a name="_a1"></a><a class="code" href="classMastodon_1_1Easy.html">Mastodon::Easy</a>;</div><div class="line"><span class="keyword">using</span> std::cout;</div><div class="line"><span class="keyword">using</span> std::chrono::system_clock;</div><div class="line"></div><div class="line"><span class="comment">// Print a status to stdout, nicely formatted</span></div><div class="line"><span class="keywordtype">void</span> format_status(<span class="keyword">const</span> Easy::Status &status, <span class="keyword">const</span> std::uint8_t &level)</div><div class="line">{</div><div class="line"> std::string space(level, <span class="charliteral">' '</span>);</div><div class="line"> <span class="comment">// Remove HTML-tags</span></div><div class="line"> std::regex restrip(<span class="stringliteral">"<[^>]*>"</span>);</div><div class="line"> std::string content = std::regex_replace(status.content(), restrip, <span class="stringliteral">""</span>);</div><div class="line"></div><div class="line"> cout << space << <span class="stringliteral">"+-----------------------------------------\n"</span>;</div><div class="line"> cout << space << <span class="stringliteral">"| "</span> << status.account().acct() << <span class="stringliteral">": \n"</span>;</div><div class="line"></div><div class="line"> <span class="keywordflow">while</span> (!content.empty())</div><div class="line"> {</div><div class="line"> cout << space << <span class="stringliteral">"| "</span> << content.substr(0, 40) << <span class="charliteral">'\n'</span>;</div><div class="line"> <span class="keywordflow">if</span> (content.length() > 40)</div><div class="line"> {</div><div class="line"> content = content.substr(40);</div><div class="line"> }</div><div class="line"> <span class="keywordflow">else</span></div><div class="line"> {</div><div class="line"> content.clear();</div><div class="line"> }</div><div class="line"> }</div><div class="line"> cout << space << <span class="stringliteral">"| "</span></div><div class="line"> << Easy::strtime_local(status.created_at(), <span class="stringliteral">"%T"</span>) << <span class="charliteral">'\n'</span>;</div><div class="line"> cout << space << <span class="stringliteral">"+-----------------------------------------"</span> << std::endl;</div><div class="line">}</div><div class="line"></div><div class="line"><span class="comment">// Fetch status and its descendants, output them</span></div><div class="line">std::uint16_t print_status(Easy &masto, <span class="keyword">const</span> std::string &<span class="keywordtype">id</span>,</div><div class="line"> <span class="keyword">const</span> std::uint8_t level)</div><div class="line">{</div><div class="line"> std::uint16_t ret;</div><div class="line"> std::string answer;</div><div class="line"> API::parametermap parameters =</div><div class="line"> {</div><div class="line"> { <span class="stringliteral">"id"</span>, { <span class="keywordtype">id</span> }}</div><div class="line"> };</div><div class="line"></div><div class="line"> ret = masto.get(Mastodon::API::v1::statuses_id, parameters, answer);</div><div class="line"></div><div class="line"> <span class="keywordflow">if</span> (ret == 0)</div><div class="line"> {</div><div class="line"> format_status(Easy::Status(answer), level);</div><div class="line"></div><div class="line"> ret = masto.get(Mastodon::API::v1::statuses_id_context,</div><div class="line"> parameters, answer);</div><div class="line"> <span class="keywordflow">if</span> (ret == 0)</div><div class="line"> {</div><div class="line"> Easy::Context context(answer);</div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> Easy::Status &s : context.descendants())</div><div class="line"> {</div><div class="line"> <span class="comment">// Only print descendant if it is a direct reply</span></div><div class="line"> <span class="comment">// NOTE: This is a wasteful approach, I use it only in the</span></div><div class="line"> <span class="comment">// interest of more clarity. Don't do this at home. :-)</span></div><div class="line"> <span class="keywordflow">if</span> (s.in_reply_to_id() == id)</div><div class="line"> {</div><div class="line"> print_status(masto, s.id(), level + 4);</div><div class="line"> }</div><div class="line"> }</div><div class="line"> }</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="keywordflow">return</span> ret;</div><div class="line">}</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[])</div><div class="line">{</div><div class="line"> <span class="keywordflow">if</span> (argc < 2)</div><div class="line"> {</div><div class="line"> std::cerr << <span class="stringliteral">"usage: "</span> << argv[0] << <span class="stringliteral">" <url>\n"</span>;</div><div class="line"> <span class="keywordflow">return</span> 1;</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="comment">// Extract domain name</span></div><div class="line"> std::string instance = std::string(argv[1]);</div><div class="line"> std::size_t pos = instance.find(<span class="charliteral">'/'</span>) + 2;</div><div class="line"> instance = instance.substr(pos, instance.find(<span class="charliteral">'/'</span>, pos) - pos);</div><div class="line"></div><div class="line"> <span class="comment">// Extract status ID</span></div><div class="line"> std::string <span class="keywordtype">id</span> = std::string(argv[1]);</div><div class="line"> <span class="keywordtype">id</span> = <span class="keywordtype">id</span>.substr(<span class="keywordtype">id</span>.rfind(<span class="charliteral">'/'</span>) + 1);</div><div class="line"></div><div class="line"> cout << <span class="stringliteral">" Instance: "</span> << instance << <span class="stringliteral">"\nStatus ID: "</span> << <span class="keywordtype">id</span> << <span class="stringliteral">"\n\n"</span>;</div><div class="line"></div><div class="line"> Easy masto(instance, <span class="stringliteral">""</span>);</div><div class="line"> <span class="keywordflow">return</span> print_status(masto, <span class="keywordtype">id</span>, 0);</div><div class="line">}</div><div class="line"></div><div class="line"><span class="preprocessor">#else</span></div><div class="line"><span class="preprocessor">#include <cstdio></span></div><div class="line"><span class="keywordtype">int</span> main()</div><div class="line">{</div><div class="line"> printf(<span class="stringliteral">"mastodon-cpp was compiled without Easy support.\n"</span>);</div><div class="line"> <span class="keywordflow">return</span> 255;</div><div class="line">}</div><div class="line"><span class="preprocessor">#endif // WITHOUT_EASY</span></div></div><!-- fragment --> </div><!-- contents -->
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