awesome-wm-widgets/_widgets/github-activity-widget.md

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GitHub Activity Widget

Widget shows recent activities on GitHub. It is very similar to the GitHub's "All activity" feed on the main page:

Mouse click on the item opens repo/issue/pr depending on the type of the activity. Mouse click on user's avatar opens user GitHub profile.

Customization

It is possible to customize widget by providing a table with all or some of the following config parameters:

Name	Default	Description
icon	github.png from the widget sources	Widget icon displayed on the wibar
username	your username	Required parameter
number_of_events	10	Number of events to display in the list

How it works

Everything starts with this timer, which gets recent activities by calling GitHub Events API and stores the response under /.cache/awmw/github-activity-widget/activity.json directory:

gears.timer {
    timeout   = 600,   -- calls every ten minutes
    call_now  = true,
    autostart = true,
    callback  = function()
        spawn.easy_async(string.format(UPDATE_EVENTS_CMD, username, CACHE_DIR), function(stdout, stderr)
            if stderr ~= '' then show_warning(stderr) return end
        end)
    end
}

There are several reasons to store output in a file and then use it as a source to build the widget, instead of calling it everytime the widget is opened:

• activity feed does not update that often
• events API doesn't provide filtering of fields, so the output is quite large (300 events)
• it's much faster to read file from filesystem

Next important part is rebuild_widget function, which is called when mouse button clicks on the widget on the wibar. It receives a json string which contains first n events from the cache file. Those events are processed by jq (get first n events, remove unused fields, slightly change the json structure to simplify serialization to lua table). And then it builds a widget, row by row in a loop. To display the text part of the row we already have all neccessary information in the json string which was converted to lua table. But to show an avatar we should download it first. This is done in the following snippet. First it creates a template and then checks if file already exists, and sets it in template, otherwise, downloads it asynchronously and only then sets in:

local avatar_img = wibox.widget {
   resize = true,
   forced_width = 40,
   forced_height = 40,
   widget = wibox.widget.imagebox
}

if gfs.file_readable(path_to_avatar) then
   avatar_img:set_image(path_to_avatar)
else
   -- download it first
   spawn.easy_async(string.format(
           DOWNLOAD_AVATAR_CMD,
           CACHE_DIR,
           event.actor.id,
           event.actor.avatar_url), 
           -- and then set
           function() avatar_img:set_image(path_to_avatar) end)
end