From 9124ca6fb9e7e7e3bce29411f11b6401fde804b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Piotr=20Ko=C5=82aczkowski?= <pkolaczk@gmail.com>
Date: Tue, 23 Jul 2024 16:21:19 +0200
Subject: [PATCH] Add join, read_words, read_resource_words fns

---
 src/scripting/functions.rs | 42 ++++++++++++++++++++++++++++++++++++++
 src/scripting/mod.rs       |  3 +++
 2 files changed, 45 insertions(+)

diff --git a/src/scripting/functions.rs b/src/scripting/functions.rs
index 9330a05..dbf5690 100644
--- a/src/scripting/functions.rs
+++ b/src/scripting/functions.rs
@@ -148,6 +148,22 @@ pub fn hash_select(i: i64, collection: &[Value]) -> Value {
     collection[(hash_inner(i) % collection.len() as i64) as usize].clone()
 }
 
+/// Joins all strings in vector with given separator
+#[rune::function]
+pub fn join(collection: &[Value], separator: &str) -> VmResult<String> {
+    let mut result = String::new();
+    let mut first = true;
+    for v in collection {
+        let v = vm_try!(v.clone().into_string());
+        if !first {
+            result.push_str(separator);
+        }
+        result.push_str(vm_try!(v.borrow_ref()).as_str());
+        first = false;
+    }
+    VmResult::Ok(result)
+}
+
 /// Reads a file into a string.
 #[rune::function]
 pub fn read_to_string(filename: &str) -> io::Result<String> {
@@ -171,6 +187,24 @@ pub fn read_lines(filename: &str) -> io::Result<Vec<String>> {
     Ok(result)
 }
 
+/// Reads a file into a vector of words.
+#[rune::function]
+pub fn read_words(filename: &str) -> io::Result<Vec<String>> {
+    let file = File::open(filename)
+        .map_err(|e| io::Error::new(e.kind(), format!("Failed to open file {filename}: {e}")))?;
+    let buf = BufReader::new(file);
+    let mut result = Vec::new();
+    for line in buf.lines() {
+        let line = line?;
+        let words = line
+            .split(|c: char| !c.is_alphabetic())
+            .map(|s| s.to_string())
+            .filter(|s| !s.is_empty());
+        result.extend(words);
+    }
+    Ok(result)
+}
+
 /// Reads a resource file as a string.
 fn read_resource_to_string_inner(path: &str) -> io::Result<String> {
     let resource = Resources::get(path).ok_or_else(|| {
@@ -194,6 +228,14 @@ pub fn read_resource_lines(path: &str) -> io::Result<Vec<String>> {
         .collect())
 }
 
+#[rune::function]
+pub fn read_resource_words(path: &str) -> io::Result<Vec<String>> {
+    Ok(read_resource_to_string_inner(path)?
+        .split(|c: char| !c.is_alphabetic())
+        .map(|s| s.to_string())
+        .collect())
+}
+
 #[rune::function(instance)]
 pub async fn prepare(mut ctx: Mut<Context>, key: Ref<str>, cql: Ref<str>) -> Result<(), CassError> {
     ctx.prepare(&key, &cql).await
diff --git a/src/scripting/mod.rs b/src/scripting/mod.rs
index b9501c5..bc3a09a 100644
--- a/src/scripting/mod.rs
+++ b/src/scripting/mod.rs
@@ -44,6 +44,7 @@ fn try_install(
     latte_module.function_meta(functions::blob)?;
     latte_module.function_meta(functions::text)?;
     latte_module.function_meta(functions::vector)?;
+    latte_module.function_meta(functions::join)?;
     latte_module.function_meta(functions::now_timestamp)?;
     latte_module.function_meta(functions::hash)?;
     latte_module.function_meta(functions::hash2)?;
@@ -68,8 +69,10 @@ fn try_install(
     let mut fs_module = Module::with_crate("fs")?;
     fs_module.function_meta(functions::read_to_string)?;
     fs_module.function_meta(functions::read_lines)?;
+    fs_module.function_meta(functions::read_words)?;
     fs_module.function_meta(functions::read_resource_to_string)?;
     fs_module.function_meta(functions::read_resource_lines)?;
+    fs_module.function_meta(functions::read_resource_words)?;
 
     rune_ctx.install(&context_module)?;
     rune_ctx.install(&err_module)?;