feat(github): New module

Module used to query the GitHub API for information.
Currently only supports notification count.

Ref #84

src/modules/github.cpp

@@ -0,0 +1,79 @@
+#include "modules/github.hpp"
+#include "drawtypes/label.hpp"
+
+#include "modules/meta/base.inl"
+#include "modules/meta/timer_module.inl"
+
+POLYBAR_NS
+
+namespace modules {
+  template class module<github_module>;
+  template class timer_module<github_module>;
+
+  /**
+   * Construct module
+   */
+  github_module::github_module(const bar_settings& bar, string name)
+      : timer_module<github_module>(bar, name), m_http(http_util::make_downloader()) {}
+
+  /**
+   * Bootstrap module
+   */
+  void github_module::setup() {
+    m_accesstoken = m_conf.get<string>(name(), "token");
+    m_interval = m_conf.get<chrono::seconds>(name(), "interval", 60s);
+
+    m_formatter->add(DEFAULT_FORMAT, TAG_LABEL, {TAG_LABEL});
+
+    if (m_formatter->has(TAG_LABEL)) {
+      m_label = load_optional_label(m_conf, name(), TAG_LABEL, "Notifications: %notifications%");
+    }
+  }
+
+  /**
+   * Update module contents
+   */
+  bool github_module::update() {
+    string content{m_http->get("https://api.github.com/notifications?access_token=" + m_accesstoken)};
+    long response_code{m_http->response_code()};
+
+    switch (response_code) {
+      case 200:
+        break;
+      case 401:
+        throw module_error("Bad credentials");
+      case 403:
+        throw module_error("Maximum number of login attempts exceeded");
+      default:
+        throw module_error("Unspecified error (" + to_string(response_code) + ")");
+    }
+
+    size_t pos{0};
+    size_t notifications{0};
+
+    while ((pos = content.find("\"unread\":true", pos + 1)) != string::npos) {
+      notifications++;
+    }
+
+    if (m_label) {
+      m_label->reset_tokens();
+      m_label->replace_token("%notifications%", to_string(notifications));
+    }
+
+    return true;
+  }
+
+  /**
+   * Build module content
+   */
+  bool github_module::build(builder* builder, const string& tag) const {
+    if (tag == TAG_LABEL) {
+      builder->node(m_label);
+    } else {
+      return false;
+    }
+    return true;
+  }
+}
+
+POLYBAR_NS_END