x4/bin/khatus_x4_parse_mpd_status_currentsong

   1 #! /usr/bin/awk -f
   2
   3 # Msg separator
   4 /^OK/ {msg_count++; next}
   5
   6 # Msg content
   7 /^[a-zA-Z-]+: / {
   8     key = $1
   9     val = $0
  10     sub(".*" key " *", "", val)
  11     sub(":$", "", key)
  12     key = tolower(key)
  13     # Note that we expect a particular order of response messages (also
  14     # reflected in the name of this script file): "status" THEN "currentsong"
  15          if (msg_count == 1) {status[key]      = val}
  16     else if (msg_count == 2) {currentsong[key] = val}
  17     else {
  18         printf("Unexpected msg_count in mpd response: %d\n", msg_count) \
  19             > "/dev/stderr"
  20         exit 1
  21     }
  22     next
  23 }
  24
  25 END {
  26     name  = currentsong["name"]
  27     title = currentsong["title"]
  28     file  = currentsong["file"]
  29
  30     if (name) {
  31         song = name
  32     } else if (title) {
  33         song = title
  34     } else if (file) {
  35         last = split(file, parts, "/")
  36         song = parts[last]
  37     } else {
  38         song = "?"
  39     }
  40
  41     format_time(status["time"], time)
  42     state_symbol = symbol_of_state(status["state"])
  43     print("status", sprintf("%s %s %s", state_symbol, time["minimal_units"], time["percentage"]))
  44 }
  45
  46 function symbol_of_state(state) {
  47     if (state = "play") {
  48         return "▶"
  49     } else if (state = "pause") {
  50         return "❚❚"
  51     } else if (state = "stop") {
  52         return "⬛"
  53     } else {
  54         print("Error: unexpected value for state: ", state) > "/dev/stderr"
  55         exit 1
  56     }
  57 }
  58
  59 function format_time(time_str, time_arr,    \
  60     \
  61     time_str_parts,
  62     seconds_current,
  63     seconds_total,
  64     hours,
  65     secs_beyond_hours,
  66     mins,
  67     secs,
  68     time_percentage \
  69 ) {
  70     split(time_str, time_str_parts, ":")
  71     seconds_current = time_str_parts[1]
  72     seconds_total   = time_str_parts[2]
  73
  74     hours = int(seconds_current / 60 / 60);
  75     secs_beyond_hours = seconds_current - (hours * 60 * 60);
  76     mins = int(secs_beyond_hours / 60);
  77     secs = secs_beyond_hours - (mins * 60);
  78
  79     if (hours > 0) {
  80         time_arr["minimal_units"] = sprintf("%d:%.2d:%.2d", hours, mins, secs)
  81     } else {
  82         time_arr["minimal_units"] = sprintf("%.2d:%.2d", mins, secs)
  83     }
  84
  85     if (seconds_total > 0) {
  86         time_percentage = (seconds_current / seconds_total) * 100
  87         time_arr["percentage"] = sprintf("%d%%", time_percentage)
  88     } else {
  89         time_arr["percentage"] = "~"
  90     }
  91 }