jawk 0.1.16

JSON AWK.
Documentation 
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use std::rc::Rc;

use indexmap::IndexMap;

use crate::{
    functions_definitions::{Example, FunctionDefinitions},
    json_value::JsonValue,
    processor::Context,
    selection::Get,
};

pub fn get() -> FunctionDefinitions {
    FunctionDefinitions::new("zip", 2, usize::MAX, |args| {
        struct Impl(Vec<Rc<dyn Get>>);
        impl Get for Impl {
            fn get(&self, value: &Context) -> Option<JsonValue> {
                let mut zipped_list = vec![];
                let mut all_lists = Vec::with_capacity(self.0.len());
                let mut max_size = 0;
                for arg in &self.0 {
                    if let Some(JsonValue::Array(list)) = arg.get(value) {
                        if list.len() > max_size {
                            max_size = list.len();
                        }
                        all_lists.push(list);
                    } else {
                        return None;
                    }
                }
                for index in 0..max_size {
                    let mut datum = IndexMap::new();
                    for (i, lst) in all_lists.iter().enumerate() {
                        if let Some(value) = lst.get(index) {
                            datum.insert(format!(".{i}").to_string(), value.clone());
                        }
                    }
                    zipped_list.push(datum.into());
                }
                Some(zipped_list.into())
            }
        }
        Rc::new(Impl(args))
    })
        .add_description_line("Zip a few list into a new list.")
        .add_description_line("All the arguments must be lists.")
        .add_description_line(
            "The output will be a list of object, with keys in the format `\".i\"` where `i` is the index list."
        )
        .add_example(
            Example::new()
                .add_argument("[\"one\", \"two\", \"three\"]")
                .add_argument("[1, 2, 3]")
                .expected_output(
                    "[{\".0\": \"one\", \".1\": 1}, {\".0\": \"two\", \".1\": 2}, {\".0\": \"three\", \".1\": 3}]"
                )
        )
        .add_example(
            Example::new()
                .add_argument("[\"one\", \"two\", \"three\"]")
                .add_argument("[1, 2, 3]")
                .add_argument("[false]")
                .expected_output(
                    "[{\".0\": \"one\", \".1\": 1, \".2\": false}, {\".0\": \"two\", \".1\": 2}, {\".0\": \"three\", \".1\": 3}]"
                )
        )
        .add_example(
            Example::new()
                .add_argument("[\"one\", \"two\", \"three\"]")
                .add_argument("[1, 2, 3]")
                .add_argument("6")
        )
}