2020-03-19 20:18:24 +01:00
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use crate::commands::WholeStreamCommand;
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use crate::prelude::*;
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use futures::StreamExt;
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2020-08-18 09:00:02 +02:00
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use nu_data::value::format_leaf;
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2020-03-19 20:18:24 +01:00
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use nu_errors::ShellError;
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use nu_protocol::{ReturnSuccess, Signature, UntaggedValue, Value};
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pub struct ToMarkdown;
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2020-10-15 05:20:55 +02:00
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#[derive(Deserialize)]
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pub struct ToMarkdownArgs {
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pretty: bool,
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}
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2020-05-29 10:22:52 +02:00
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#[async_trait]
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2020-03-19 20:18:24 +01:00
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impl WholeStreamCommand for ToMarkdown {
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fn name(&self) -> &str {
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2020-05-04 10:44:33 +02:00
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"to md"
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2020-03-19 20:18:24 +01:00
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}
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fn signature(&self) -> Signature {
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2020-10-15 05:20:55 +02:00
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Signature::build("to md").switch(
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"pretty",
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"Formats the Markdown table to vertically align items",
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Some('p'),
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)
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2020-03-19 20:18:24 +01:00
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}
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fn usage(&self) -> &str {
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"Convert table into simple Markdown"
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}
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2020-05-29 10:22:52 +02:00
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async fn run(
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2020-03-19 20:18:24 +01:00
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&self,
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args: CommandArgs,
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registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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2020-10-06 01:13:27 +02:00
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to_md(args, registry).await
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2020-03-19 20:18:24 +01:00
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}
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2020-10-15 05:20:55 +02:00
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "Outputs an unformatted md string representing the contents of ls",
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example: "ls | to md",
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result: None,
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},
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Example {
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description: "Outputs a formatted md string representing the contents of ls",
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example: "ls | to md -p",
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result: None,
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},
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]
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}
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2020-03-19 20:18:24 +01:00
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}
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2020-10-06 01:13:27 +02:00
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async fn to_md(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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2020-05-16 05:18:24 +02:00
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let registry = registry.clone();
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2020-10-15 05:20:55 +02:00
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let name_tag = args.call_info.name_tag.clone();
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let (ToMarkdownArgs { pretty }, input) = args.process(®istry).await?;
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let input: Vec<Value> = input.collect().await;
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2020-06-08 06:48:10 +02:00
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let headers = nu_protocol::merge_descriptors(&input);
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let mut output_string = String::new();
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2020-03-19 20:18:24 +01:00
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2020-10-15 05:20:55 +02:00
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let mut column_length_vector: Vec<usize> = Vec::new();
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if pretty {
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if !headers.is_empty() && (headers.len() > 1 || headers[0] != "") {
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for header in &headers {
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let htmlescape_header_string = &htmlescape::encode_minimal(&header);
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column_length_vector.push(htmlescape_header_string.len());
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}
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}
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for row in &input {
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if let UntaggedValue::Row(row) = row.value.clone() {
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for i in 0..headers.len() {
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let data = row.get_data(&headers[i]);
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let new_column_length = format_leaf(data.borrow()).plain_string(100_000).len();
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if column_length_vector[i] < new_column_length {
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column_length_vector[i] = new_column_length;
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}
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}
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}
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}
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}
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2020-06-08 06:48:10 +02:00
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if !headers.is_empty() && (headers.len() > 1 || headers[0] != "") {
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output_string.push_str("|");
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2020-10-15 05:20:55 +02:00
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for i in 0..headers.len() {
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let htmlescape_string = htmlescape::encode_minimal(&headers[i]);
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let final_string = if pretty {
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get_padded_string(htmlescape_string, column_length_vector[i], ' ')
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} else {
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htmlescape_string
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};
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output_string.push_str(&final_string);
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2020-06-08 06:48:10 +02:00
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output_string.push_str("|");
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}
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2020-10-15 05:20:55 +02:00
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2020-06-08 06:48:10 +02:00
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output_string.push_str("\n|");
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2020-10-15 05:20:55 +02:00
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#[allow(clippy::needless_range_loop)]
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for i in 0..headers.len() {
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let final_string = if pretty {
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"-".repeat(column_length_vector[i])
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} else {
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String::from("-")
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};
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output_string.push_str(final_string.as_str());
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2020-03-19 20:18:24 +01:00
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output_string.push_str("|");
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}
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2020-10-15 05:20:55 +02:00
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2020-06-08 06:48:10 +02:00
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output_string.push_str("\n");
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}
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2020-03-19 20:18:24 +01:00
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2020-06-08 06:48:10 +02:00
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for row in input {
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match row.value {
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UntaggedValue::Row(row) => {
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output_string.push_str("|");
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2020-10-15 05:20:55 +02:00
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for i in 0..headers.len() {
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let data = row.get_data(&headers[i]);
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let leaf_string = format_leaf(data.borrow()).plain_string(100_000);
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let final_string = if pretty {
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get_padded_string(leaf_string, column_length_vector[i], ' ')
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} else {
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leaf_string
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};
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output_string.push_str(&final_string);
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2020-03-19 20:18:24 +01:00
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output_string.push_str("|");
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}
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2020-10-15 05:20:55 +02:00
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2020-06-08 06:48:10 +02:00
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output_string.push_str("\n");
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}
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p => {
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output_string.push_str(
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&(htmlescape::encode_minimal(&format_leaf(&p).plain_string(100_000))),
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);
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output_string.push_str("\n");
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2020-03-19 20:18:24 +01:00
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}
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}
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2020-06-08 06:48:10 +02:00
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}
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2020-03-19 20:18:24 +01:00
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2020-06-08 06:48:10 +02:00
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Ok(OutputStream::one(ReturnSuccess::value(
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UntaggedValue::string(output_string).into_value(name_tag),
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)))
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2020-03-19 20:18:24 +01:00
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}
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2020-05-18 14:56:01 +02:00
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2020-10-15 05:20:55 +02:00
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fn get_padded_string(text: String, desired_length: usize, character: char) -> String {
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let padding_length = desired_length - text.len();
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return format!("{}{}", text, character.to_string().repeat(padding_length));
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}
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2020-05-18 14:56:01 +02:00
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#[cfg(test)]
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mod tests {
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2020-10-03 16:06:02 +02:00
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use super::ShellError;
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2020-05-18 14:56:01 +02:00
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use super::ToMarkdown;
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#[test]
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2020-10-03 16:06:02 +02:00
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fn examples_work_as_expected() -> Result<(), ShellError> {
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2020-05-18 14:56:01 +02:00
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use crate::examples::test as test_examples;
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2020-10-03 16:06:02 +02:00
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Ok(test_examples(ToMarkdown {})?)
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2020-05-18 14:56:01 +02:00
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}
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}
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