1 files changed, 44 insertions, 0 deletions
diff --git a/vendor/askama/src/filters/json.rs b/vendor/askama/src/filters/json.rs
new file mode 100644
index 000000000..809be91b0
--- /dev/null
+++ b/vendor/askama/src/filters/json.rs
@@ -0,0 +1,44 @@
+use crate::error::{Error, Result};
+use askama_escape::JsonEscapeBuffer;
+use serde::Serialize;
+use serde_json::to_writer_pretty;
+
+/// Serialize to JSON (requires `json` feature)
+///
+/// The generated string does not contain ampersands `&`, chevrons `< >`, or apostrophes `'`.
+/// To use it in a `<script>` you can combine it with the safe filter:
+///
+/// ``` html
+/// <script>
+/// var data = {{data|json|safe}};
+/// </script>
+/// ```
+///
+/// To use it in HTML attributes, you can either use it in quotation marks `"{{data|json}}"` as is,
+/// or in apostrophes with the (optional) safe filter `'{{data|json|safe}}'`.
+/// In HTML texts the output of e.g. `<pre>{{data|json|safe}}</pre>` is safe, too.
+pub fn json<S: Serialize>(s: S) -> Result<String> {
+    let mut writer = JsonEscapeBuffer::new();
+    to_writer_pretty(&mut writer, &s).map_err(Error::from)?;
+    Ok(writer.finish())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_json() {
+        assert_eq!(json(true).unwrap(), "true");
+        assert_eq!(json("foo").unwrap(), r#""foo""#);
+        assert_eq!(json(true).unwrap(), "true");
+        assert_eq!(json("foo").unwrap(), r#""foo""#);
+        assert_eq!(
+            json(vec!["foo", "bar"]).unwrap(),
+            r#"[
+  "foo",
+  "bar"
+]"#
+        );
+    }
+}