fmeringdal · dgmachado · May 11, 2023 · May 13, 2023 · May 17, 2023 · May 17, 2023
diff --git a/Cargo.toml b/Cargo.toml
@@ -7,6 +7,7 @@ rust-version = "1.64.0"
 members = [
     "rrule",
     "rrule-debugger",
+    "rrule-wasm"
 ]
 
 # These are the 2 packages to mainly work on.

diff --git a/rrule-wasm/Cargo.toml b/rrule-wasm/Cargo.toml
@@ -0,0 +1,20 @@
+[package]
+name = "rrule-wasm"
+version = "0.1.0"
+authors = ["Ralph Bisschops <ralph.bisschops.dev@gmail.com>"]
+publish = false
+license.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rrule = { path = "../rrule" }
+wasm-bindgen = "0.2.63"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.13"
diff --git a/rrule-wasm/Makefile b/rrule-wasm/Makefile
@@ -0,0 +1,17 @@
+install-wasm-pack:
+	curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+
+build-wasm-nodejs:
+	wasm-pack build --target nodejs
+
+test-wasm-on-nodejs:
+	node example/nodejs/app.js
+
+build-wasm-web:
+	wasm-pack build --target web
+
+test-wasm-on-web-browser:
+	cd example/web && npx http-server
+
+run-unit-tests:
+	wasm-pack test --node
diff --git a/rrule-wasm/example/nodejs/app.js b/rrule-wasm/example/nodejs/app.js
@@ -0,0 +1,20 @@
+const { get_all_date_recurrences } = require('../../pkg/rrule_wasm.js');
+
+const http = require('http');
+const url = require('url');
+const hostname = '127.0.0.1';
+const port = 3000;
+
+const server = http.createServer((req, res) => {
+  const queryObject = url.parse(req.url,true).query;
+  res.statusCode = 200;
+  res.setHeader('Content-Type', 'text/plain');
+
+  var data = get_all_date_recurrences("DTSTART:20120201T093000Z\nRRULE:FREQ=DAILY;COUNT=3", 100);
+  console.log(data);
+  res.end(data.toString());
+});
+
+server.listen(port, hostname, () => {
+  console.log(`Server running at http://${hostname}:${port}/`);
+});
diff --git a/rrule-wasm/example/web/index.html b/rrule-wasm/example/web/index.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta content="text/html;charset=utf-8" http-equiv="Content-Type"/>
+    <meta http-equiv="cache-control" content="max-age=0" />
+    <meta http-equiv="cache-control" content="no-cache" />
+  </head>
+  <body>
+
+    <script type="module">
+      import init, { get_all_date_recurrences } from '../../pkg/rrule_wasm.js';
+
+      async function run_wasm() {
+	  await init();
+    var data = get_all_date_recurrences("DTSTART:20120201T093000Z\nRRULE:FREQ=DAILY;COUNT=3", 100);
+	  console.log(data);
+	  alert(data);
+      }
+
+      run_wasm();
+    </script>
+  </body>
+</html>
diff --git a/rrule-wasm/src/lib.rs b/rrule-wasm/src/lib.rs
@@ -0,0 +1,19 @@
+use rrule::RRuleSet;
+use wasm_bindgen::prelude::*;
+
+/**
+  Get all recurrences of the rrule!
+     rule_set_string: List of rrules
+     limit: Limit must be set in order to prevent infinite loops
+*/
+#[wasm_bindgen]
+pub fn get_all_date_recurrences(rule_set_string: &str, limit: Option<u16>) -> Vec<JsValue> {
+    let rrule: RRuleSet = rule_set_string.parse().unwrap();
+    //  Set hard limit in case of infinitely recurring rules
+    let rule_set = rrule.all(limit.unwrap_or(100));
+    let result: Vec<JsValue> = rule_set.dates
+        .into_iter()
+        .map(|s| JsValue::from_str(&Some(s).unwrap().to_string()))
+        .collect();
+    return result;
+}
diff --git a/rrule-wasm/tests/wasm.rs b/rrule-wasm/tests/wasm.rs
@@ -0,0 +1,11 @@
+use wasm_bindgen_test::*;
+use rrule_wasm::get_all_date_recurrences;
+
+#[wasm_bindgen_test]
+fn test_date_recurrences() {
+   let dates: Vec<wasm_bindgen::JsValue> = get_all_date_recurrences("DTSTART:20120201T093000Z\nRRULE:FREQ=DAILY;COUNT=3", Some(100));
+   assert_eq!(dates.len(), 3);
+   assert_eq!(dates.get(0).unwrap().as_string().unwrap(), "2012-02-01 09:30:00 UTC");
+   assert_eq!(dates.get(1).unwrap().as_string().unwrap(), "2012-02-02 09:30:00 UTC");
+   assert_eq!(dates.get(2).unwrap().as_string().unwrap(), "2012-02-03 09:30:00 UTC");
+}