1  #!/usr/bin/env bash
  2  # setting the locale, some users have issues with different locales, this forces the correct one
  3  export LC_ALL=en_US.UTF-8
  4  
  5  # configuration
  6  # @dracula-continuum-mode default (countdown|time|alert|interval)
  7  # @dracula-continuum-time-threshold 15
  8  
  9  alert_mode="@dracula-continuum-mode"
 10  time_threshold="@dracula-continuum-time-threshold"
 11  warn_threshold=360
 12  first_save="@dracula-continuum-first-save"
 13  
 14  # tmux-resurrect and tmux-continuum options
 15  if [ -d "$HOME/.tmux/resurrect" ]; then
 16    default_resurrect_dir="$HOME/.tmux/resurrect"
 17  else
 18    default_resurrect_dir="${XDG_DATA_HOME:-$HOME/.local/share}"/tmux/resurrect
 19  fi
 20  resurrect_dir_option="@resurrect-dir"
 21  last_auto_save_option="@continuum-save-last-timestamp"
 22  auto_save_interval_option="@continuum-save-interval"
 23  auto_save_interval_default="15"
 24  
 25  current_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 26  source $current_dir/utils.sh
 27  
 28  current_timestamp() {
 29    echo "$(date +%s)"
 30  }
 31  
 32  file_mtime() {
 33    if [ ! -f "$1" ]; then
 34      echo -1
 35      return
 36    fi
 37    case $(uname -s) in
 38      Linux|Darwin)
 39        date -r "$1" +%s
 40        ;;
 41  
 42      FreeBSD)
 43        stat -f %m "$1"
 44        ;;
 45  
 46      CYGWIN*|MINGW32*|MSYS*|MINGW*)
 47        # TODO - windows compatability
 48        ;;
 49    esac
 50  }
 51  
 52  timestamp_date() {
 53    case $(uname -s) in
 54      Linux)
 55        date -d "@$1" "$2"
 56        ;;
 57  
 58      Darwin|FreeBSD)
 59        date -r "$1" "$2"
 60        ;;
 61  
 62      CYGWIN*|MINGW32*|MSYS*|MINGW*)
 63        # TODO - windows compatability
 64        ;;
 65    esac
 66  }
 67  
 68  set_tmux_option() {
 69    local option="$1"
 70    local value="$2"
 71    tmux set-option -gq "$option" "$value"
 72  }
 73  
 74  # tmux-resurrect dir
 75  resurrect_dir() {
 76    if [ -z "$_RESURRECT_DIR" ]; then
 77      local path="$(get_tmux_option "$resurrect_dir_option" "$default_resurrect_dir")"
 78      # expands tilde, $HOME and $HOSTNAME if used in @resurrect-dir
 79      echo "$path" | sed "s,\$HOME,$HOME,g; s,\$HOSTNAME,$(hostname),g; s,\~,$HOME,g"
 80    else
 81      echo "$_RESURRECT_DIR"
 82    fi
 83  }
 84  _RESURRECT_DIR="$(resurrect_dir)"
 85  
 86  last_resurrect_file() {
 87    echo "$(resurrect_dir)/last"
 88  }
 89  
 90  last_saved_timestamp() {
 91    local last_saved_timestamp="$(get_tmux_option "$last_auto_save_option" "")"
 92    local first_save_timestamp="$(get_tmux_option "$first_save" "")"
 93    # continuum sets the last save timestamp to the current time on first load if auto_save_option is not set
 94    # so we can outrace it and detect that last_uato_save_option is empty and the timestamp is a dummy save
 95    if [ -z "$first_save_timestamp" ]; then
 96      last_saved_timestamp="$(file_mtime "$(last_resurrect_file)")" || last_saved_timestamp=-1
 97      set_tmux_option "$first_save" "$last_saved_timestamp"
 98    elif [ "$first_save_timestamp" != "done" ]; then
 99      last_saved_timestamp="$(file_mtime "$(last_resurrect_file)")" || last_saved_timestamp=-1
100      if [ "$last_saved_timestamp" -gt "$first_save_timestamp" ]; then
101        set_tmux_option "$first_save" "done"
102      else
103        last_saved_timestamp="$first_save_timestamp"
104      fi
105    fi
106    echo "$last_saved_timestamp"
107  }
108  
109  print_status() {
110    local mode="$(get_tmux_option "$alert_mode" "countdown")"
111    local info_threshold="$(get_tmux_option "$time_threshold" "15")"
112    local save_int="$(get_tmux_option "$auto_save_interval_option" "$auto_save_interval_default")"
113    local interval_seconds="$((save_int * 60))"
114    local status=""
115    local last_timestamp="$(last_saved_timestamp)"
116    local time_delta="$(($(current_timestamp) - last_timestamp))"
117    local time_delta_minutes="$((time_delta / 60))"
118  
119    if [[ $save_int -gt 0 ]]; then
120      if [[ "$time_delta" -gt $((interval_seconds + warn_threshold)) ]]; then
121        if [[ "$last_timestamp" == -1 ]]; then
122          status="no save"
123        else
124          status="last save: $(timestamp_date "$last_timestamp" '+%F %T')"
125        fi
126        if [[ "$mode" == "countdown" ]]; then
127          # continuum timestamp may be different than file timestamp on first load
128          local last_continuum_timestamp="$(get_tmux_option "$last_auto_save_option" "")"
129          time_delta="$(($(current_timestamp) - last_continuum_timestamp))"
130          time_delta_minutes="$((time_delta / 60))"
131  
132          status="$status; T$(printf '%+d' "$((time_delta_minutes - save_int))")min"
133        fi
134      elif [[ "$time_delta" -le "$info_threshold" ]]; then
135        status="saved"
136      else
137        case "$mode" in
138          countdown)
139            status="T$(printf '%+d' "$((time_delta_minutes - save_int))")min";
140            ;;
141  
142          time)
143            status="$time_delta_minutes";
144            ;;
145  
146          alert)
147            status=""
148            ;;
149  
150          interval)
151            status="$save_int"
152            ;;
153        esac
154      fi
155    else
156      status="off"
157    fi
158  
159    echo "$status"
160  }
161  print_status