1 files changed, 70 insertions, 0 deletions
diff --git a/bin/breaktimer-sample.sh b/bin/breaktimer-sample.sh
new file mode 100755
index 0000000..2bd6f85
--- /dev/null
+++ b/bin/breaktimer-sample.sh
@@ -0,0 +1,70 @@
+#!/bin/bash
+# Sample breaktimer's state into a cache file, for widgets/breaktimer.lua.
+#
+# Conky's Lua cannot run a process, so it cannot call `kill -0` to learn whether
+# the daemon is alive, and shelling out every two seconds to ask breaktimer.sh
+# `status` would parse prose rather than read the four small files the daemon
+# already writes under $XDG_RUNTIME_DIR. Those files are the whole interface;
+# this script is the one place that interprets them.
+
+set -u
+
+CACHE_DIR="${XDG_CACHE_HOME:-$HOME/.cache}/udt"
+CACHE="$CACHE_DIR/breaktimer.txt"
+
+umask 077
+mkdir -p "$CACHE_DIR"
+
+TMP="$CACHE.tmp.$$"
+trap 'rm -f "$TMP"' EXIT
+
+RUNTIME="${XDG_RUNTIME_DIR:-/tmp}"
+PID_FILE="$RUNTIME/breaktimer.pid"
+STATE_FILE="$RUNTIME/breaktimer.state"
+PHASE_FILE="$RUNTIME/breaktimer.phase"
+REMAIN_FILE="$RUNTIME/breaktimer.remain"
+
+# The daemon's own tick. Used only to decide how stale the remain file may be
+# before the clock counts as frozen.
+TICK=5
+
+running=no
+if [ -f "$PID_FILE" ] && kill -0 "$(cat "$PID_FILE" 2>/dev/null)" 2>/dev/null; then
+    running=yes
+fi
+
+state=stopped
+phase=stopped
+remain=0
+if [ "$running" = yes ]; then
+    state=$(cat "$STATE_FILE" 2>/dev/null)
+    phase=$(cat "$PHASE_FILE" 2>/dev/null)
+    remain=$(cat "$REMAIN_FILE" 2>/dev/null)
+fi
+[ -z "$state" ] && state=stopped
+[ -z "$phase" ] && phase=stopped
+case "$remain" in ''|*[!0-9]*) remain=0 ;; esac
+
+# Outside the work-hours window the daemon leaves the phase at 'working' without
+# decrementing, so the remain file stops being rewritten; its age is the honest
+# signal that the clock is frozen. Three ticks of slack, so a sample landing a
+# moment before the next tick never reads as frozen. A paused daemon freezes the
+# file too but reports 'paused' and is handled on its own, and a hung daemon
+# freezes it as well, which is a state worth showing rather than hiding.
+frozen=no
+if [ "$running" = yes ] && [ "$state" = running ] && [ "$phase" = working ] \
+   && [ -f "$REMAIN_FILE" ]; then
+    mt=$(stat -c %Y "$REMAIN_FILE" 2>/dev/null || echo 0)
+    [ $(( $(date +%s) - mt )) -gt $((TICK * 3)) ] && frozen=yes
+fi
+
+{
+    echo "generated $(date +%s)"
+    echo "running $running"
+    echo "state $state"
+    echo "phase $phase"
+    echo "remain $remain"
+    echo "frozen $frozen"
+} > "$TMP"
+
+mv -f "$TMP" "$CACHE"