src/postman/sender.rs

@@ -34,8 +34,10 @@ use crate::{
 lazy_static! {
     pub static ref TIMEFROM_REGEX: Regex =
         Regex::new(r#"<<timefrom:(?P<time>\d+):(?P<format>.+)?>>"#).unwrap();
-    pub static ref TIMENOW_REGEX: Regex =
+    pub static ref TIMENOW_REGEX: Regex = Regex::new(
-        Regex::new(r#"<<timenow:(?P<timezone>(?:\w|/|_)+):(?P<format>.+)?>>"#).unwrap();
+        r#"<<timenow(?:(?P<sign>[+-])(?P<offset>\d+))?:(?P<timezone>(?:\w|/|_)+?):(?P<format>.+?)?>>"#
+    )
+    .unwrap();
     pub static ref LOG_TO_DATABASE: bool = env::var("LOG_TO_DATABASE").map_or(true, |v| v == "1");
 }
 
@@ -64,7 +66,7 @@ fn fmt_displacement(format: &str, seconds: u64) -> String {
 }
 
 pub fn substitute(string: &str) -> String {
-    let new = TIMEFROM_REGEX.replace(string, |caps: &Captures| {
+    let new = TIMEFROM_REGEX.replace_all(string, |caps: &Captures| {
         let final_time = caps.name("time").map(|m| m.as_str().parse::<i64>().ok()).flatten();
         let format = caps.name("format").map(|m| m.as_str());
 
@@ -92,12 +94,26 @@ pub fn substitute(string: &str) -> String {
     });
 
     TIMENOW_REGEX
-        .replace(&new, |caps: &Captures| {
+        .replace_all(&new, |caps: &Captures| {
             let timezone = caps.name("timezone").map(|m| m.as_str().parse::<Tz>().ok()).flatten();
             let format = caps.name("format").map(|m| m.as_str());
+            let sign = caps.name("sign").map(|m| m.as_str());
+            let offset = caps.name("offset").map(|m| m.as_str().parse::<i64>().ok()).flatten();
 
             if let (Some(timezone), Some(format)) = (timezone, format) {
-                let now = Utc::now().with_timezone(&timezone);
+                let mut now = Utc::now().with_timezone(&timezone);
+                if let (Some(sign), Some(offset)) = (sign, offset) {
+                    now = now
+                        .checked_add_signed(TimeDelta::seconds(
+                            offset * {
+                                match sign {
+                                    "-" => -1,
+                                    _ => 1,
+                                }
+                            },
+                        ))
+                        .unwrap_or(now)
+                }
 
                 now.format(format).to_string()
             } else {

templates/support/create_reminder.html.tera

@@ -37,4 +37,36 @@
         </div>
     </section>
 
+    <section class="hero is-small">
+        <div class="hero-body">
+            <div class="container">
+                <p class="title">Custom formatting rules</p>
+                <p class="content">
+                    Reminder content can be customized using formatting rules.
+                </p>
+                <p class="subtitle">timefrom</p>
+                <p class="content">
+                    The <code>timefrom</code> formatting rule will display a formatted difference
+                    between the time the reminder sends and a specified time.
+                    <br>
+                    For example, if the current time is 1755800000 (UNIX time), the format string
+                    <code>&lt;&lt;timefrom:1755803600&gt;&gt;</code> would display "1 hour"
+                </p>
+                <p class="subtitle">timenow</p>
+                <p class="content">
+                    The <code>timenow</code> formatting rule displays the current time or an offset
+                    from the current time in a given timezone in a custom format.
+                    <br>
+                    For example, if the current time is 1755800000 (UNIX time), the format string
+                    <code>&lt;&lt;timenow:UTC:%H:%M:%S&gt;&gt;</code> would display "18:13:20"
+                    <br>
+                    Optionally, an offset can be provided to display a time from your current time.
+                    For example, if the current time is 1755800000 (UNIX time), the format string
+                    <code>&lt;&lt;timenow+120:UTC:%H:%M:%S&gt;&gt;</code> would display "18:15:20",
+                    or <code>&lt;&lt;timenow-120:UTC:%H:%M:%S&gt;&gt;</code> would display "18:11:20"
+                </p>
+            </div>
+        </div>
+    </section>
+
 {% endblock %}