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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">example13_easy_stream.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 some information from the public timeline.</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 <memory></span></div><div class="line"><span class="preprocessor">#include <vector></span></div><div class="line"><span class="preprocessor">#include <chrono></span></div><div class="line"><span class="preprocessor">#include <mutex></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="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 < 3)</div><div class="line"> {</div><div class="line"> std::cerr << <span class="stringliteral">"usage: "</span> << argv[0] << <span class="stringliteral">" <instance> <access token>\n"</span>;</div><div class="line"> <span class="keywordflow">return</span> 1;</div><div class="line"> }</div><div class="line"></div><div class="line"> cout << <span class="stringliteral">"I'll show you the public timeline. Press CTRL-C to cancel\n"</span>;</div><div class="line"></div><div class="line"> <span class="comment">// These have to be static in order to use them in- and outside the thread</span></div><div class="line"> <span class="keyword">static</span> std::string stream;</div><div class="line"> <span class="comment">// You can cancel the stream with this pointer (ptr->cancel_stream())</span></div><div class="line"> <span class="keyword">static</span> std::unique_ptr<Mastodon::API::http> ptr;</div><div class="line"></div><div class="line"> <span class="comment">// Start a new thread for the stream</span></div><div class="line"> std::thread pub_tl([=]</div><div class="line"> {</div><div class="line"> Easy masto(argv[1], argv[2]);</div><div class="line"> masto.get_stream(Mastodon::API::v1::streaming_public, stream, ptr);</div><div class="line"> });</div><div class="line"></div><div class="line"> <span class="keywordflow">while</span> (<span class="keyword">true</span>)</div><div class="line"> {</div><div class="line"> std::this_thread::sleep_for(std::chrono::seconds(1));</div><div class="line"> <span class="comment">// Skip iteration if ptr points not to the Mastodon::API::http object</span></div><div class="line"> <span class="keywordflow">if</span> (ptr == <span class="keyword">nullptr</span>)</div><div class="line"> {</div><div class="line"> <span class="keywordflow">continue</span>;</div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="comment">// Acquire lock for the stream variable</span></div><div class="line"> std::lock_guard<std::mutex> lock(ptr->get_mutex());</div><div class="line"></div><div class="line"> <span class="comment">// Parse event stream and clear it afterwards</span></div><div class="line"> std::vector<Easy::stream_event> events = Easy::parse_stream(stream);</div><div class="line"> stream.clear();</div><div class="line"></div><div class="line"> <span class="comment">// The contents of the stream are now in a vector of pairs</span></div><div class="line"> <span class="comment">// { Easy::event_type, std::string }</span></div><div class="line"> <span class="keywordflow">for</span> (<span class="keyword">const</span> Easy::stream_event &event : events)</div><div class="line"> {</div><div class="line"> Easy::Status status;</div><div class="line"> Easy::Notification notification;</div><div class="line"></div><div class="line"> <span class="comment">// Print out some information about the events</span></div><div class="line"> <span class="keywordflow">switch</span> (event.first)</div><div class="line"> {</div><div class="line"> <span class="keywordflow">case</span> Easy::event_type::Update:</div><div class="line"> status.from_string(event.second);</div><div class="line"> cout << <span class="stringliteral">"["</span> <<</div><div class="line"> Easy::strtime_local(status.created_at(), <span class="stringliteral">"%T"</span>) << <span class="stringliteral">"] "</span>;</div><div class="line"> cout << <span class="stringliteral">"Status from: "</span> << status.account().acct()</div><div class="line"> << <span class="stringliteral">" ("</span> << status.url() << <span class="stringliteral">")\n"</span>;</div><div class="line"> <span class="keywordflow">break</span>;</div><div class="line"> <span class="keywordflow">case</span> Easy::event_type::Notification:</div><div class="line"> notification.from_string(event.second);</div><div class="line"> cout << <span class="stringliteral">"Notification involving: "</span></div><div class="line"> << notification.account().acct()</div><div class="line"> << <span class="stringliteral">" ("</span> << notification.id() << <span class="stringliteral">")\n"</span>;</div><div class="line"> <span class="keywordflow">break</span>;</div><div class="line"> <span class="keywordflow">case</span> Easy::event_type::Delete:</div><div class="line"> cout << <span class="stringliteral">"Deleted: "</span> << <span class="keyword">event</span>.second << <span class="charliteral">'\n'</span>;</div><div class="line"> <span class="keywordflow">break</span>;</div><div class="line"> <span class="keywordflow">default</span>:</div><div class="line"> cout << <span class="stringliteral">"Something undefined happened. 😱\n"</span>;</div><div class="line"> }</div><div class="line"> }</div><div class="line"> }</div><div class="line"></div><div class="line"> pub_tl.join();</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><!-- 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