flowstdlib 1.0.0

The standard library of functions and flows for 'flow' programs
Documentation 
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use serde_json::{json, Value};

use flowcore::errors::Result;
use flowcore::flow_output;
use flowcore::RunAgain;
use flowmacro::flow_function;

#[flow_function]
fn inner_duplicate_rows(input: &Value, factor: &Value) -> Result<(Option<Value>, RunAgain)> {
    let mut output_matrix: Vec<Value> = vec![];
    let mut row_indexes = vec![];

    let matrix = input.as_array().ok_or("Could not get matrix")?;
    let factor = factor.as_i64().ok_or("Could not get factor")?;

    for (row_index, row) in matrix.iter().enumerate() {
        for _i in 0..factor {
            output_matrix.push(row.clone());
            row_indexes.push(row_index);
        }
    }

    flow_output!(
        "matrix" => json!(output_matrix),
        "row_indexes" => json!(row_indexes),
    )
}

#[cfg(test)]
#[allow(clippy::unwrap_used, clippy::expect_used)]
mod test {
    use serde_json::json;

    use super::inner_duplicate_rows;

    #[test]
    fn duplicate_2() {
        let matrix = json!([[1, 2], [3, 4]]);
        let duplication_factor = json!(2);

        let (result, _) =
            inner_duplicate_rows(&matrix, &duplication_factor).expect("_duplicate_rows() failed");

        let output = result.expect("Could not get the Value from the output");

        let new_matrix = output
            .pointer("/matrix")
            .expect("Could not get 'matrix' output");

        assert_eq!(
            new_matrix.get(0).expect("Could not get [0]"),
            &json!([1, 2])
        );
        assert_eq!(
            new_matrix.get(1).expect("Could not get [1]"),
            &json!([1, 2])
        );
        assert_eq!(
            new_matrix.get(2).expect("Could not get [2]"),
            &json!([3, 4])
        );
        assert_eq!(
            new_matrix.get(3).expect("Could not get [3]"),
            &json!([3, 4])
        );

        let row_indexes = output
            .pointer("/row_indexes")
            .expect("Could not get 'row_indexes' output");
        assert_eq!(row_indexes.get(0).expect("Could not get [0]"), &json!(0));
        assert_eq!(row_indexes.get(1).expect("Could not get [1]"), &json!(0));
        assert_eq!(row_indexes.get(2).expect("Could not get [2]"), &json!(1));
        assert_eq!(row_indexes.get(3).expect("Could not get [3]"), &json!(1));
    }

    #[test]
    fn duplicate_3() {
        let matrix = json!([[1, 2], [3, 4]]);
        let duplication_factor = json!(3);

        let (result, _) =
            inner_duplicate_rows(&matrix, &duplication_factor).expect("_duplicate_rows() failed");

        let output = result.expect("Could not get the Value from the output");

        let new_matrix = output
            .pointer("/matrix")
            .expect("Could not get 'matrix' output");

        assert_eq!(
            new_matrix.get(0).expect("Could not get [0]"),
            &json!([1, 2])
        );
        assert_eq!(
            new_matrix.get(1).expect("Could not get [1]"),
            &json!([1, 2])
        );
        assert_eq!(
            new_matrix.get(2).expect("Could not get [2]"),
            &json!([1, 2])
        );
        assert_eq!(
            new_matrix.get(3).expect("Could not get [3]"),
            &json!([3, 4])
        );
        assert_eq!(
            new_matrix.get(4).expect("Could not get [4]"),
            &json!([3, 4])
        );
        assert_eq!(
            new_matrix.get(5).expect("Could not get [5]"),
            &json!([3, 4])
        );
    }
}