2020-03-15 04:04:44 +01:00
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use crate::commands::WholeStreamCommand;
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use crate::data::value::format_leaf;
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use crate::prelude::*;
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use futures::StreamExt;
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use nu_errors::ShellError;
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use nu_protocol::{Primitive, ReturnSuccess, Signature, UntaggedValue, Value};
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use nu_source::AnchorLocation;
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pub struct ToHTML;
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impl WholeStreamCommand for ToHTML {
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fn name(&self) -> &str {
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"to-html"
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}
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fn signature(&self) -> Signature {
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Signature::build("to-html")
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}
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fn usage(&self) -> &str {
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"Convert table into simple HTML"
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}
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fn run(
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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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to_html(args, registry)
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}
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}
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fn to_html(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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let args = args.evaluate_once(registry)?;
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let name_tag = args.name_tag();
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//let name_span = name_tag.span;
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let stream = async_stream! {
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let input: Vec<Value> = args.input.values.collect().await;
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let headers = nu_protocol::merge_descriptors(&input);
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let mut output_string = "<html><body>".to_string();
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if !headers.is_empty() && (headers.len() > 1 || headers[0] != "<value>") {
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output_string.push_str("<table>");
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output_string.push_str("<tr>");
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for header in &headers {
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output_string.push_str("<th>");
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output_string.push_str(&htmlescape::encode_minimal(&header));
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output_string.push_str("</th>");
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}
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output_string.push_str("</tr>");
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}
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for row in input {
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match row.value {
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UntaggedValue::Primitive(Primitive::Binary(b)) => {
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// This might be a bit much, but it's fun :)
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match row.tag.anchor {
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Some(AnchorLocation::Url(f)) |
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Some(AnchorLocation::File(f)) => {
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let extension = f.split('.').last().map(String::from);
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match extension {
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2020-03-19 20:18:24 +01:00
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Some(s) if ["png", "jpg", "bmp", "gif", "tiff", "jpeg"].contains(&s.to_lowercase().as_str()) => {
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2020-03-15 04:04:44 +01:00
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output_string.push_str("<img src=\"data:image/");
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output_string.push_str(&s);
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output_string.push_str(";base64,");
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output_string.push_str(&base64::encode(&b));
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output_string.push_str("\">");
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}
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_ => {}
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}
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}
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_ => {}
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}
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}
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2020-03-16 08:19:18 +01:00
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UntaggedValue::Primitive(Primitive::String(ref b)) => {
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// This might be a bit much, but it's fun :)
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match row.tag.anchor {
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Some(AnchorLocation::Url(f)) |
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Some(AnchorLocation::File(f)) => {
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let extension = f.split('.').last().map(String::from);
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match extension {
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2020-03-19 20:18:24 +01:00
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Some(s) if s.to_lowercase() == "svg" => {
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2020-03-16 08:19:18 +01:00
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output_string.push_str("<img src=\"data:image/svg+xml;base64,");
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output_string.push_str(&base64::encode(&b.as_bytes()));
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output_string.push_str("\">");
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continue;
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}
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_ => {}
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}
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}
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_ => {}
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}
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output_string.push_str(&(htmlescape::encode_minimal(&format_leaf(&row.value).plain_string(100_000)).replace("\n", "<br>")));
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}
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2020-03-15 04:04:44 +01:00
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UntaggedValue::Row(row) => {
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output_string.push_str("<tr>");
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for header in &headers {
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let data = row.get_data(header);
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output_string.push_str("<td>");
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output_string.push_str(&format_leaf(data.borrow()).plain_string(100_000));
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output_string.push_str("</td>");
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}
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output_string.push_str("</tr>");
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}
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p => {
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output_string.push_str(&(htmlescape::encode_minimal(&format_leaf(&p).plain_string(100_000)).replace("\n", "<br>")));
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}
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}
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}
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if !headers.is_empty() && (headers.len() > 1 || headers[0] != "<value>") {
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output_string.push_str("</table>");
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}
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output_string.push_str("</body></html>");
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yield ReturnSuccess::value(UntaggedValue::string(output_string).into_value(name_tag));
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};
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Ok(stream.to_output_stream())
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}
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