feat!: added mostly foundational code, and a playground of sorts to interact with it

server/src/modules/meta/text.rs

@@ -0,0 +1,41 @@
+use serde_json::json;
+use crate::ObjectInstance;
+
+pub const TEMPLATE: &str = r#"
+[input.value]
+transforms = []
+subobjects = []
+conditions = []
+duplicates = false
+
+[local.length]
+transforms = ["meta/number:value"]
+subobjects = []
+conditions = []
+duplicates = false
+"#;
+
+pub fn validate(obj: &ObjectInstance) -> Result<(), String> {
+    let value = obj.input.get("value")
+        .ok_or("input.value must exist")?;
+
+    let _value = value.as_str()
+        .ok_or("input.value must be a string")?;
+
+    Ok(())
+}
+
+pub fn local(obj: &ObjectInstance) -> Result<ObjectInstance, String> {
+    let value = obj.input.get("value")
+        .ok_or("input.value must exist")?;
+
+    let value = value.as_str()
+        .ok_or("input.value must be a string")?;
+
+    let mut new = obj.clone();
+    new.local = json!({
+        "length": value.len()
+    });
+
+    Ok(new)
+}