Add stackoverflow widget

stackoverflow-widget/README.md

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+# Stackoverflow widget
+
+When clicked, widget shows latest questions from stackoverflow.com with a given tag(s).
+
+![screenshot](./screenshot.png)
+
+## Customization
+
+It is possible to customize widget by providing a table with all or some of the following config parameters:
+
+| Name | Default | Description |
+|---|---|---|
+| `icon`| `/.config/awesome/awesome-wm-widgets/stackoverflow-widget/so-icon.svg| Path to the icon|
+| `limit` | 5 | Number of items to show in the widget
+| `tagged` | awesome-wm | Tag, or comma-separated tags |
+
+## Installation
+
+1. Clone this repo (if not cloned yet) under **~/.config/awesome/**:
+
+    ```bash
+    git clone https://github.com/streetturtle/awesome-wm-widgets.git ~/.config/awesome/
+    ```
+
+1. Require widget at the top of the **rc.lua**:
+
+    ```lua
+    local stackoverflow_widget = require("awesome-wm-widgets.stackoverflow-widget.stackoverflow")
+    ```
+
+1. Add widget to the tasklist:
+
+    ```lua
+    s.mytasklist, -- Middle widget
+        { -- Right widgets
+            layout = wibox.layout.fixed.horizontal,
+            ...
+            --default
+            stackoverflow_widget(),
+            --customized
+            stackoverflow_widget({
+                limit = 10
+            })
+            ...
+    ```
+    

stackoverflow-widget/so-icon.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 120 120"><style>.st0{fill:#bcbbbb}.st1{fill:#f48023}</style><path class="st0" d="M84.4 93.8V70.6h7.7v30.9H22.6V70.6h7.7v23.2z"/><path class="st1" d="M38.8 68.4l37.8 7.9 1.6-7.6-37.8-7.9-1.6 7.6zm5-18l35 16.3 3.2-7-35-16.4-3.2 7.1zm9.7-17.2l29.7 24.7 4.9-5.9-29.7-24.7-4.9 5.9zm19.2-18.3l-6.2 4.6 23 31 6.2-4.6-23-31zM38 86h38.6v-7.7H38V86z"/></svg>

stackoverflow-widget/stackoverflow.lua

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+-------------------------------------------------
+-- Stackoverflow Widget for Awesome Window Manager
+-- Shows new questions by a given tag
+-- More details could be found here:
+-- https://github.com/streetturtle/awesome-wm-widgets/tree/master/stackoverflow-widget
+
+-- @author Pavel Makhov
+-- @copyright 2019 Pavel Makhov
+-------------------------------------------------
+
+local awful = require("awful")
+local wibox = require("wibox")
+local watch = require("awful.widget.watch")
+local json = require("json")
+local spawn = require("awful.spawn")
+local gears = require("gears")
+local beautiful = require("beautiful")
+
+local HOME_DIR = os.getenv("HOME")
+
+local GET_QUESTIONS_CMD = [[bash -c "curl --compressed -s -X GET 'http://api.stackexchange.com/2.2/questions/no-answers?page=1&pagesize=%s&order=desc&sort=activity&tagged=%s&site=stackoverflow'"]]
+
+local stackoverflow_widget = {}
+
+local function worker(args)
+
+    local args = args or {}
+
+    local icon = args.icon or HOME_DIR .. '/.config/awesome/awesome-wm-widgets/stackoverflow-widget/so-icon.svg'
+    local limit = args.limit or 5
+    local tagged = args.tagged or 'awesome-wm'
+
+    local rows = {
+        { widget = wibox.widget.textbox },
+        layout = wibox.layout.fixed.vertical,
+    }
+
+    local popup = awful.popup{
+        visible = true,
+        ontop = true,
+        visible = false,
+        shape = gears.shape.rounded_rect,
+        border_width = 1,
+        border_color = beautiful.bg_focus,
+        maximum_width = 400,
+        preferred_positions = top,
+        offset = { y = 5 },
+        widget = {}
+    }
+
+    stackoverflow_widget = wibox.widget {
+        {
+            image = icon,
+            widget = wibox.widget.imagebox
+        },
+        {
+            id = "txt",
+            widget = wibox.widget.textbox
+        },
+        layout = wibox.layout.fixed.horizontal,
+        set_text = function(self, new_value)
+            self.txt.text = new_value
+        end,
+    }
+
+    local update_widget = function(widget, stdout, stderr, _, _)
+
+        local result = json.decode(stdout)
+
+        for i = 0, #rows do rows[i]=nil end
+        for _, item in ipairs(result.items) do
+            local tags = ''
+            for i = 1, #item.tags do tags = tags .. item.tags[i] .. ' ' end
+            local row = wibox.widget {
+                {
+                    {
+                        {
+                            text = item.title,
+                            widget = wibox.widget.textbox
+                        },
+                        {
+                            text = tags,
+                            align = 'right',
+                            widget = wibox.widget.textbox
+                        },
+                        layout = wibox.layout.align.vertical
+                    },
+                    margins = 8,
+                    layout = wibox.container.margin
+                },
+                widget = wibox.container.background
+            }
+
+            row:connect_signal("button::release", function(_, _, _, button)
+                spawn.with_shell("google-chrome " .. item.link)
+                popup.visible = false
+            end)
+
+            row:connect_signal("mouse::enter", function(c) c:set_bg(beautiful.bg_focus) end)
+            row:connect_signal("mouse::leave", function(c) c:set_bg(beautiful.bg_normal) end)
+
+            table.insert(rows, row)
+        end
+
+        popup:setup(rows)
+    end
+
+    stackoverflow_widget:buttons(
+            awful.util.table.join(
+                    awful.button({}, 1, function()
+                        if popup.visible then
+                            popup.visible = not popup.visible
+                        else
+                            popup:move_next_to(mouse.current_widget_geometry)
+                        end
+                    end)
+            )
+    )
+    watch(string.format(GET_QUESTIONS_CMD, limit, tagged),  300, update_widget, stackoverflow_widget)
+    return stackoverflow_widget
+end
+
+return setmetatable(stackoverflow_widget, { __call = function(_, ...) return worker(...) end })