Add about page

CMakeLists.txt

@@ -30,7 +30,7 @@ add_link_options(${FLAGS})
 
 
 add_executable(${PROJECT_NAME} main.cpp numberhelper.cpp config.cpp models.cpp client.cpp servehelper.cpp timeutils.cpp
-    routes/home.cpp routes/css.cpp routes/user.cpp routes/status.cpp routes/tags.cpp
+    routes/home.cpp routes/css.cpp routes/user.cpp routes/status.cpp routes/tags.cpp routes/about.cpp
     blankie/serializer.cpp blankie/escape.cpp)
 set_target_properties(${PROJECT_NAME}
     PROPERTIES

client.cpp

@@ -171,6 +171,21 @@ std::vector<Post> MastodonClient::get_tag_timeline(const std::string& host, cons
     return posts;
 }
 
+Instance MastodonClient::get_instance(const std::string& host) {
+    using namespace std::string_literals;
+
+    Instance instance = this->_send_request("https://"s + host + "/api/v2/instance");
+    instance.contact_account.same_server = instance.contact_account.server == host;
+    return instance;
+}
+
+blankie::html::HTMLString MastodonClient::get_extended_description(const std::string& host) {
+    using namespace std::string_literals;
+
+    nlohmann::json j = this->_send_request("https://"s + host + "/api/v1/instance/extended_description");
+    return blankie::html::HTMLString(j.at("content").get<std::string>());
+}
+
 CURL* MastodonClient::_get_easy() {
     CURL* curl = pthread_getspecific(this->_easy_key);
     if (!curl) {

client.h

@@ -73,6 +73,9 @@ public:
 
     std::vector<Post> get_tag_timeline(const std::string& host, const std::string& tag, std::optional<std::string> max_id);
 
+    Instance get_instance(const std::string& host);
+    blankie::html::HTMLString get_extended_description(const std::string& host);
+
 private:
     CURL* _get_easy();
     nlohmann::json _send_request(const std::string& url);

main.cpp

@@ -49,6 +49,11 @@ int main(int argc, char** argv) {
     // protect against ..
     server.Get("/(" DOMAIN_RE ")/tags/(?!\\.|%2E|%2e)(.+)", tags_route);
 
+    server.Get("/(" DOMAIN_RE ")/about", about_route);
+    server.Get("/(" DOMAIN_RE ")/?", [](const httplib::Request& req, httplib::Response& res) {
+        serve_redirect(req, res, get_origin(req) + '/' + req.matches.str(1) + "/about", false);
+    });
+
     server.Get("/https://?(.+)", [](const httplib::Request& req, httplib::Response& res) {
         serve_redirect(req, res, get_origin(req) + '/' + req.matches.str(1), true);
     });

models.cpp

@@ -127,6 +127,20 @@ void from_json(const json& j, PostContext& context) {
     j.at("descendants").get_to(context.descendants);
 }
 
+void from_json(const json& j, Instance& instance) {
+    j.at("title").get_to(instance.title);
+    j.at("description").get_to(instance.description);
+    j.at("thumbnail").at("url").get_to(instance.thumbnail);
+    j.at("contact").at("email").get_to(instance.contact_email);
+    j.at("contact").at("account").get_to(instance.contact_account);
+
+    json rules = j.at("rules");
+    instance.rules.reserve(rules.size());
+    for (const json& i : rules) {
+        instance.rules.push_back(i.at("text").get<std::string>());
+    }
+}
+
 
 static std::regex rfc3339_re(R"EOF((\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(?:\.\d+)?(?:(Z)|([+-]\d{2}):(\d{2})))EOF", std::regex::ECMAScript | std::regex::icase);
 time_t parse_rfc3339(const std::string& str) {

models.h

@@ -96,6 +96,15 @@ struct PostContext {
     std::vector<Post> descendants;
 };
 
+struct Instance {
+    std::string title;
+    std::string description;
+    std::string thumbnail;
+    std::string contact_email;
+    Account contact_account;
+    std::vector<std::string> rules;
+};
+
 void from_json(const nlohmann::json& j, Emoji& emoji);
 void from_json(const nlohmann::json& j, AccountField& field);
 void from_json(const nlohmann::json& j, Account& account);
@@ -104,3 +113,4 @@ void from_json(const nlohmann::json& j, PollOption& option);
 void from_json(const nlohmann::json& j, Poll& poll);
 void from_json(const nlohmann::json& j, Post& post);
 void from_json(const nlohmann::json& j, PostContext& context);
+void from_json(const nlohmann::json& j, Instance& instance);

routes/about.cpp

@@ -0,0 +1,51 @@
+#include "routes.h"
+#include "../servehelper.h"
+#include "../client.h"
+#include "../models.h"
+
+void about_route(const httplib::Request& req, httplib::Response& res) {
+    using namespace std::string_literals;
+
+    std::string server = req.matches.str(1);
+
+    Instance instance;
+    blankie::html::HTMLString extended_description;
+    try {
+        instance = mastodon_client.get_instance(server);
+        extended_description = mastodon_client.get_extended_description(server);
+    } catch (const std::exception& e) {
+        res.status = 500;
+        serve_error(req, res, "500: Internal server error", "Failed to fetch instance information", e.what());
+        return;
+    }
+
+    Element rules("ol");
+    rules.nodes.reserve(instance.rules.size());
+    for (const std::string& rule : instance.rules) {
+        rules.nodes.push_back(Element("li", {rule}));
+    }
+
+    Element body("body", {
+        Element("a", {{"href", instance.thumbnail}}, {
+            Element("img", {{"class", "about_page-header"}, {"src", instance.thumbnail}}, {}),
+        }),
+        Element("p", {
+            Element("b", {instance.title, ":"}), " ", instance.description,
+            Element("br"), Element("b", {"Email:"}), " ", Element("a", {{"href", "mailto:"s + instance.contact_email}}, {instance.contact_email}),
+            Element("br"), Element("b", {"Administered by:"}), " ", Element("a", {{"href", get_origin(req) + '/' + server + "/@" + instance.contact_account.acct(false)}}, {
+                preprocess_html(req, instance.contact_account.emojis, instance.contact_account.display_name), " (@", instance.contact_account.acct(false), ")",
+            }),
+        }),
+
+        Element("details", {{"class", "about_page-about"}, {"open", ""}}, {
+            Element("summary", {"About"}),
+            preprocess_html(req, server, {}, std::move(extended_description)),
+        }),
+
+        Element("details", {{"class", "about_page-rules"}}, {
+            Element("summary", {"Rules"}),
+            rules,
+        }),
+    });
+    serve(req, res, "About "s + instance.title, std::move(body));
+}

routes/css.cpp

@@ -26,7 +26,7 @@ p, details {
     margin-top: 1em;
     margin-bottom: 1em;
 }
-ul {
+ul, ol {
     margin: revert;
     padding: revert;
 }
@@ -165,7 +165,6 @@ svg {
 .user_page-header {
     width: 100%;
     height: 15em;
-    object-fit: cover;
 }
 
 .user_page-main_header {
@@ -237,6 +236,20 @@ svg {
     /* don't ask why, but making it a block element just works */
     display: block;
 }
+
+/* ABOUT PAGE */
+.about_page-header {
+    width: 100%;
+    height: 15em;
+}
+:is(.about_page-about, .about_page-rules) summary {
+    font-size: 130%;
+    font-weight: bold;
+}
+.about_page-about * {
+    margin: revert;
+    padding: revert;
+}
 )EOF";
 // one for \0, one for trailing newline
 #define CSS_LEN sizeof(css) / sizeof(css[0]) - 2

routes/routes.h

@@ -9,3 +9,4 @@ void css_route(const httplib::Request& req, httplib::Response& res);
 void user_route(const httplib::Request& req, httplib::Response& res);
 void status_route(const httplib::Request& req, httplib::Response& res);
 void tags_route(const httplib::Request& req, httplib::Response& res);
+void about_route(const httplib::Request& req, httplib::Response& res);