playtwitch: add basic font support and improve http error handling

scripts/playtwitch/src/State.zig

@@ -20,6 +20,7 @@ pub const Live = enum {
     live,
     offline,
     loading,
+    err,
 };
 
 mutex: std.Thread.Mutex,

scripts/playtwitch/src/config.zig

@@ -78,5 +78,5 @@ pub fn configLoaderThread(state: *State) !void {
         state.channels = channels.toOwnedSlice();
     }
 
-    try @import("live.zig").fetchChannelsLive(state);
+    @import("live.zig").tryFetchChannelsLive(state);
 }

scripts/playtwitch/src/gui.zig

@@ -190,11 +190,13 @@ pub fn winContent(state: *State) !void {
                         .loading => c.ImVec4{ .x = 1.0, .y = 1.0, .z = 0.0, .w = 1.0 },
                         .live => c.ImVec4{ .x = 0.0, .y = 1.0, .z = 0.0, .w = 1.0 },
                         .offline => c.ImVec4{ .x = 1.0, .y = 0.0, .z = 0.0, .w = 1.0 },
+                        .err => c.ImVec4{ .x = 0.8, .y = 0.0, .z = 0.0, .w = 1.0 },
                     };
                     const live_label = switch (ch.live) {
                         .loading => "Loading...",
                         .live => "Live",
                         .offline => "Offline",
+                        .err => "Error",
                     };
 
                     const prev_col = c.igGetStyle().*.Colors[c.ImGuiCol_Text];

scripts/playtwitch/src/live.zig

@@ -16,10 +16,26 @@ pub fn reloadLiveThread(s: *State) !void {
         }
     }
 
-    try fetchChannelsLive(s);
+    tryFetchChannelsLive(s);
 }
 
-pub fn fetchChannelsLive(s: *State) !void {
+pub fn tryFetchChannelsLive(s: *State) void {
+    fetchChannelsLive(s) catch |e| {
+        log.err("fetching status: {}", .{e});
+
+        s.mutex.lock();
+        defer s.mutex.unlock();
+
+        for (s.channels.?) |*chan| {
+            switch (chan.*) {
+                .channel => |*ch| ch.live = .err,
+                else => {},
+            }
+        }
+    };
+}
+
+fn fetchChannelsLive(s: *State) !void {
     @atomicStore(bool, &s.live_status_loading, true, .Unordered);
     defer @atomicStore(bool, &s.live_status_loading, false, .Unordered);
     log.info("initiaizing cURL", .{});
@@ -51,8 +67,6 @@ pub fn fetchChannelsLive(s: *State) !void {
     for (s.channels.?) |*entry| {
         const chan = if (entry.* == .channel) &entry.channel else continue;
 
-        page_buf.clearRetainingCapacity();
-
         log.info("requesting live state for channel {s}", .{chan.name});
 
         const url = try std.fmt.bufPrintZ(
@@ -61,8 +75,29 @@ pub fn fetchChannelsLive(s: *State) !void {
             .{chan.name},
         );
         try handleCurlErr(c.curl_easy_setopt(curl, c.CURLOPT_URL, url.ptr));
-        try handleCurlErr(c.curl_easy_perform(curl));
 
+        var tries: u8 = 3;
+        while (tries > 0) : (tries -= 1) {
+            page_buf.clearRetainingCapacity();
+
+            try handleCurlErr(c.curl_easy_perform(curl));
+
+            var response: c_long = 0;
+            try handleCurlErr(c.curl_easy_getinfo(curl, c.CURLINFO_RESPONSE_CODE, &response));
+
+            if (response != 200) {
+                log.warn(
+                    "got error response {}, retrying ({} tries left)",
+                    .{ response, tries },
+                );
+                continue;
+            }
+            break;
+        }
+
+        if (tries == 0) {
+            @atomicStore(State.Live, &chan.live, .err, .Unordered);
+        }
         if (std.mem.containsAtLeast(u8, page_buf.items, 1, "live_user")) {
             @atomicStore(State.Live, &chan.live, .live, .Unordered);
         } else {

scripts/playtwitch/src/main.zig

@@ -48,6 +48,7 @@ pub fn main() !void {
 
     c.igStyleColorsDark(null);
     @import("theme.zig").loadTheme(&c.igGetStyle().*.Colors);
+    const font = try @import("theme.zig").loadFont();
 
     const state = try State.init(win.?);
     defer state.deinit();
@@ -65,6 +66,8 @@ pub fn main() !void {
         c.ImGui_ImplOpenGL3_NewFrame();
         c.ImGui_ImplGlfw_NewFrame();
         c.igNewFrame();
+        if (font) |f|
+            c.igPushFont(f);
 
         const win_visible = c.igBegin(
             "##main_win",
@@ -89,6 +92,9 @@ pub fn main() !void {
             try gui.winContent(state);
         }
 
+        if (font != null)
+            c.igPopFont();
+
         c.igEnd();
 
         c.igEndFrame();

scripts/playtwitch/src/theme.zig

@@ -15,3 +15,33 @@ pub fn loadTheme(colors: [*]c.ImVec4) void {
     colors[c.ImGuiCol_TitleBgActive] = c.ImVec4{ .x = 0.33, .y = 0.14, .z = 0.51, .w = 1.0 };
     colors[c.ImGuiCol_WindowBg] = c.ImVec4{ .x = 0.12, .y = 0.0, .z = 0.23, .w = 0.8 };
 }
+
+pub fn loadFont() !?*c.ImFont {
+    log.info("loading fonts", .{});
+
+    const fonts = [_][:0]const u8{
+        "/usr/share/fonts/TTF/Iosevka Nerd Font Complete.ttf",
+        "/usr/share/fonts/noto/NotoSans-Regular.ttf",
+    };
+
+    for (fonts) |font| {
+        const found = if (std.fs.accessAbsolute(font, .{})) |_|
+            true
+        else |e| if (e == error.FileNotFound)
+            true
+        else
+            return e;
+
+        if (found) {
+            log.info("using font {s}", .{font});
+            return c.ImFontAtlas_AddFontFromFileTTF(
+                c.igGetIO().*.Fonts,
+                font.ptr,
+                16,
+                null,
+                null,
+            );
+        }
+    }
+    return null;
+}