feat: add czv, czv-wasm, and czv-python (init release)

czv-wasm/src/count.rs

@@ -0,0 +1,32 @@
+use crate::Result;
+use csv::ReaderBuilder;
+use wasm_bindgen::prelude::*;
+
+/// Returns a count of the total number of rows.
+///
+/// @param {string} `file_data` CSV file data.
+/// @param {boolean | undefined} `include_header_row` Specify whether to include the header row (first row) in the row count. Default is false.
+/// @returns {number}
+#[wasm_bindgen(skip_jsdoc, js_name = rowCount)]
+pub fn row_count(file_data: String, include_header_row: Option<bool>) -> Result<usize> {
+    let mut rdr = ReaderBuilder::new();
+
+    rdr.has_headers(!include_header_row.unwrap_or(false));
+    return Ok(rdr.from_reader(file_data.as_bytes()).records().count());
+}
+
+/// Returns a count of the total number of columns (fields).
+///
+/// ## Arguments
+///
+/// @param {string} `file_data` CSV file data.
+#[wasm_bindgen(skip_jsdoc, js_name = columnCount)]
+pub fn column_count(file_data: Option<String>) -> Result<usize> {
+    let rdr = ReaderBuilder::new();
+
+    if let Some(file_data) = file_data {
+        return Ok(rdr.from_reader(file_data.as_bytes()).headers()?.len());
+    } else {
+        bail!("Could not determine a file path or file data for column_count_builder.");
+    }
+}

czv-wasm/src/lib.rs

@@ -0,0 +1,30 @@
+use wasm_bindgen::JsValue;
+
+// Error-handling helpers
+#[derive(thiserror::Error, Debug)]
+#[error("{0}")]
+pub struct CzvError(anyhow::Error);
+
+impl From<csv::Error> for CzvError {
+    fn from(value: csv::Error) -> Self {
+        value.into()
+    }
+}
+
+impl Into<JsValue> for CzvError {
+    fn into(self) -> JsValue {
+        JsValue::from_str(self.to_string().as_str())
+    }
+}
+
+pub type Result<T> = anyhow::Result<T, CzvError>;
+
+#[allow(unused_macros)]
+macro_rules! bail {
+    ($err:expr $(,)?) => {
+        return Err(crate::CzvError(anyhow::anyhow!($err)))
+    };
+}
+
+// Command imports
+pub mod count;