file: add module

1 files changed, 35 insertions, 0 deletions

diff --git a/file.nim b/file.nim
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index 0000000..83c2560
--- /dev/null
+++ b/file.nim
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+# tickwatch
+# Author: Euxane TRAN-GIRARD
+# Licence: EUPL-1.2
+
+import std/paths
+import std/strutils
+
+
+type
+  FileValueMonitor = ref object
+    path: Path
+
+  FileChangeMonitor = ref object
+    path: Path
+    lastValue: int
+
+proc readValue(path: Path): int =
+  readFile(path.string).strip.parseInt
+
+proc initFileValueMonitor*(path: Path): FileValueMonitor =
+  FileValueMonitor(path: path)
+
+proc readValue*(mon: FileValueMonitor): int =
+  mon.path.readValue()
+
+proc initFileChangeMonitor*(path: Path): FileChangeMonitor =
+  FileChangeMonitor(
+    path: path,
+    lastValue: path.readValue(),
+  )
+
+proc readValue*(mon: FileChangeMonitor): int =
+  let newValue = mon.path.readValue()
+  result = abs(mon.lastValue - newValue)
+  mon.lastValue = newValue