From daf372c98d4a9df43c8270bdf9b414e9820aea90 Mon Sep 17 00:00:00 2001
From: Julian Hurst <julian.hurst@digdash.com>
Date: Wed, 30 Oct 2024 18:21:05 +0100
Subject: Add config support for specifying a timezone

---
 config.ha  | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 distamp.ha | 16 +++++++++++-----
 2 files changed, 68 insertions(+), 5 deletions(-)
 create mode 100644 config.ha

diff --git a/config.ha b/config.ha
new file mode 100644
index 0000000..6a343eb
--- /dev/null
+++ b/config.ha
@@ -0,0 +1,57 @@
+use fmt;
+use dirs;
+use format::ini;
+use time::chrono;
+use path;
+use io;
+use fs;
+use os;
+use errors;
+
+type config = struct {
+	tz: chrono::locality,
+};
+
+type noexist = !str;
+
+type conferror = !(path::error | noexist | fs::error | chrono::tzdberror);
+
+fn loadconfig() (config | conferror) = {
+	const confdir = dirs::config("distamp");
+	const buf = path::init()?;
+	const confpath = path::push(&buf, confdir, "config.ini")?;
+	const f = match (os::open(confpath)) {
+	case let e: errors::noentry =>
+		fmt::errorln("warn: No config file found")!;
+		return config {
+			tz = chrono::LOCAL,
+		};
+	case let e: fs::error =>
+		return e;
+	case let f: io::file =>
+		yield f;
+	};
+	defer io::close(f)!;
+	const sc = ini::scan(f);
+
+	let tz: chrono::locality = chrono::LOCAL;
+	for (const e => ini::next(&sc)!) {
+		if (e.1 == "tz") {
+			tz = chrono::tz(e.2)?;
+		};
+	};
+	return config {
+		tz = tz,
+	};
+};
+
+fn strconferror(e: conferror) str = {
+	match (e) {
+	case let e: path::error =>
+		return path::strerror(e);
+	case let e: fs::error =>
+		return fs::strerror(e);
+	case let e: chrono::tzdberror =>
+		return chrono::strerror(e);
+	};
+};
diff --git a/distamp.ha b/distamp.ha
index be2ce02..0b908ed 100644
--- a/distamp.ha
+++ b/distamp.ha
@@ -19,17 +19,22 @@ export fn main() void = {
 	);
 	defer getopt::finish(&cmd);
 
+	const conf = match (loadconfig()) {
+	case let e: conferror =>
+		fmt::fatal(strconferror(e));
+	case let c: config =>
+		yield c;
+	};
+
 	let days: time::duration = 0;
 	let weeks: time::duration = 0;
 	for (let opt .. cmd.opts) {
 		switch (opt.0) {
 		case 'a' =>
-			match (abs(opt.1)) {
+			match (abs(conf, opt.1)) {
 			case let i: i64 =>
 				printdistamp(i);
 				return;
-			case let e: chrono::tzdberror =>
-				fmt::fatal(chrono::strerror(e));
 			case let e: date::parsefail =>
 				let s = strings::concat(date::strerror(e), "\n", "Date format must be 'year-month-day hour:minute:second'");
 				defer free(s);
@@ -77,9 +82,10 @@ fn printdistamp(i: i64) void = {
 	fmt::printfln("<t:{}:R>", i)!;
 };
 
-fn abs(s: str) (i64 | date::error | chrono::tzdberror) = {
+fn abs(conf: config, s: str) (i64 | date::error) = {
 	let v = date::newvirtual();
-	v.vloc = chrono::tz("Europe/Paris")?;
+	v.vloc = conf.tz;
+	//v.vloc = chrono::tz("Europe/Paris")?;
 	v.zoff = date::zflag::LAP_EARLY | date::zflag::GAP_END;
 	date::parse(&v, "%Y-%m-%d %T", s)?;
 	v.nanosecond = 0;
-- 
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