remove uptimekuma, replace with textonly script

modules/uptime/run.sh

@@ -0,0 +1,100 @@
+: "${SERVICES:?must be set}"
+: "${OUTPUT_PATH:?must be set}"
+: "${RETENTION_DAYS:?must be set}"
+: "${DISPLAY_DAYS:?must be set}"
+
+state_dir=$(dirname "$OUTPUT_PATH")
+mkdir -p "$state_dir"
+
+now=$(date -u +%s)
+retention_cutoff=$(( now - RETENTION_DAYS * 86400 ))
+
+# Probe each service and rotate its log.
+while IFS= read -r line; do
+  [ -z "$line" ] && continue
+  name=${line%% *}
+  url=${line#* }
+  log="$state_dir/$name.log"
+
+  code=$(curl -fsS --max-time 10 -o /dev/null -w '%{http_code}' "$url" 2>/dev/null || true)
+  if [ -z "$code" ] || [ "$code" = "000" ]; then
+    code="000"
+    up=0
+  elif [ "${code:0:1}" = "2" ] || [ "${code:0:1}" = "3" ]; then
+    up=1
+  else
+    up=0
+  fi
+  printf '%s %s %s\n' "$now" "$up" "$code" >> "$log"
+
+  awk -v cutoff="$retention_cutoff" '$1 >= cutoff' "$log" > "$log.tmp"
+  mv "$log.tmp" "$log"
+done <<< "$SERVICES"
+
+# Render. bucket_size and cell_count are parameters so we can add
+# hour/minute granularity rows later without restructuring the awk.
+render_row() {
+  local log_file="$1"
+  local now_arg="$2"
+  local bucket_size="$3"
+  local cells="$4"
+
+  if [ ! -s "$log_file" ]; then
+    local pad
+    pad=$(printf '%*s' "$cells" '' | tr ' ' '?')
+    printf '%s 0.0 unknown\n' "$pad"
+    return
+  fi
+
+  awk -v now="$now_arg" -v bucket="$bucket_size" -v cells="$cells" '
+    BEGIN {
+      bucket_origin = int(now / bucket) * bucket
+      window_start = bucket_origin - (cells - 1) * bucket
+      window_end = bucket_origin + bucket
+      last_ok = -1
+    }
+    {
+      ts = $1; ok = $2
+      if (ts >= window_start && ts < window_end) {
+        idx = int((ts - window_start) / bucket)
+        if (idx >= 0 && idx < cells) {
+          if (ok == 1) up[idx]++; else down[idx]++
+        }
+      }
+      last_ok = ok
+    }
+    END {
+      bar = ""; total_up = 0; total_all = 0
+      for (i = 0; i < cells; i++) {
+        u = (i in up) ? up[i] : 0
+        d = (i in down) ? down[i] : 0
+        if (u + d == 0)      bar = bar "?"
+        else if (d == 0)     bar = bar "#"
+        else if (u == 0)     bar = bar "_"
+        else                 bar = bar "."
+        total_up += u; total_all += u + d
+      }
+      pct = (total_all == 0) ? 0 : (100 * total_up / total_all)
+      state = (last_ok == 1) ? "up" : (last_ok == 0) ? "down" : "unknown"
+      printf "%s %.1f %s\n", bar, pct, state
+    }' "$log_file"
+}
+
+day_bucket=86400
+
+tmp="$OUTPUT_PATH.tmp"
+{
+  printf '# updated %s\n\n' "$(date -u -d "@$now" '+%Y-%m-%d %H:%M:%S UTC')"
+
+  while IFS= read -r line; do
+    [ -z "$line" ] && continue
+    name=${line%% *}
+    log="$state_dir/$name.log"
+    read -r bar pct state < <(render_row "$log" "$now" "$day_bucket" "$DISPLAY_DAYS")
+    printf '%-20s %s %-7s %5s%%\n' "$name" "$bar" "$state" "$pct"
+  done <<< "$SERVICES"
+
+  printf '\nlegend: # up   . degraded   _ down   ? no data\n'
+} > "$tmp"
+
+mv "$tmp" "$OUTPUT_PATH"