Spotify support for polybar

.config/polybar/config

@@ -60,7 +60,7 @@ module-margin = 1
 
 modules-left = dwm title 
 modules-center = time
-modules-right = cmus pulseaudio wlan battery date
+modules-right = cmus spotify pulseaudio wlan battery date
 
 #################################################
 #                   MODULES						#
@@ -170,6 +170,33 @@ format-underline = ${colors.line}
 label =  %output%
 label-maxlen = 80
 
+[module/spotify]
+type = custom/script
+tail = true
+; prefix symbol is shown before the text
+format-prefix = " "
+format = <label>
+exec = ~/.config/polybar/scripts/scroll_spotify_status.sh
+
+[module/spotify-prev]
+type = custom/script
+exec = echo "<previous-song-symbol>"
+format = <label>
+click-left = playerctl previous spotify
+
+[module/spotify-play-pause]
+type = custom/ipc
+hook-0 = echo "<playing-symbol>"
+hook-1 = echo "<pause-symbol>"
+initial = 1
+click-left = playerctl play-pause spotify
+
+[module/spotify-next]
+type = custom/script
+exec = echo "next-song-symbol"
+format = <label>
+click-left = playerctl next spotify
+
 [module/wlan]
 type = internal/network
 interface = wlp1s0
@@ -178,7 +205,6 @@ interval = 3.0
 format-connected = <ramp-signal> <label-connected>
 format-connected-underline = ${colors.foreground}
 label-connected = %essid%
-
 format-disconnected =
 ;format-disconnected = <label-disconnected>
 ;format-disconnected-underline = ${self.format-connected-underline}

.config/polybar/scripts/get_spotify_status.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+# The name of polybar bar which houses the main spotify module and the control modules.
+PARENT_BAR="now-playing"
+PARENT_BAR_PID=$(pgrep -a "polybar" | grep "$PARENT_BAR" | cut -d" " -f1)
+
+# Set the source audio player here.
+# Players supporting the MPRIS spec are supported.
+# Examples: spotify, vlc, chrome, mpv and others.
+# Use `playerctld` to always detect the latest player.
+# See more here: https://github.com/altdesktop/playerctl/#selecting-players-to-control
+PLAYER="spotify"
+
+# Format of the information displayed
+# Eg. {{ artist }} - {{ album }} - {{ title }}
+# See more attributes here: https://github.com/altdesktop/playerctl/#printing-properties-and-metadata
+FORMAT="{{ title }} - {{ artist }}"
+
+# Sends $2 as message to all polybar PIDs that are part of $1
+update_hooks() {
+    while IFS= read -r id
+    do
+        polybar-msg -p "$id" hook spotify-play-pause $2 1>/dev/null 2>&1
+    done < <(echo "$1")
+}
+
+PLAYERCTL_STATUS=$(playerctl --player=$PLAYER status 2>/dev/null)
+EXIT_CODE=$?
+
+if [ $EXIT_CODE -eq 0 ]; then
+    STATUS=$PLAYERCTL_STATUS
+else
+    STATUS="No player is running"
+fi
+
+if [ "$1" == "--status" ]; then
+    echo "$STATUS"
+else
+    if [ "$STATUS" = "Stopped" ]; then
+        echo "No music is playing"
+    elif [ "$STATUS" = "Paused"  ]; then
+        update_hooks "$PARENT_BAR_PID" 2
+        playerctl --player=$PLAYER metadata --format "$FORMAT"
+    elif [ "$STATUS" = "No player is running"  ]; then
+        echo "$STATUS"
+    else
+        update_hooks "$PARENT_BAR_PID" 1
+        playerctl --player=$PLAYER metadata --format "$FORMAT"
+    fi
+fi

.config/polybar/scripts/scroll_spotify_status.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# see man zscroll for documentation of the following parameters
+zscroll -l 30 \
+        --delay 0.1 \
+        --scroll-padding "  " \
+        --match-command "$HOME/.config/polybar/scripts/get_spotify_status.sh --status" \
+        --match-text "Playing" "--scroll 1" \
+        --match-text "Paused" "--scroll 0" \
+        --update-check true "$HOME/.config/polybar/scripts/get_spotify_status.sh" &
+
+wait