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ec7ff5960d
* Remove async_stream! from open.rs * Ran rustfmt * Fix Clippy warning * Removed async_stream! from evaluate_by.rs * Removed async_stream! from exit.rs * Removed async_stream! from from_eml.rs * Removed async_stream! from group_by_date.rs * Removed async_stream! from group_by.rs * Removed async_stream! from map_max.rs * Removed async_stream! from to_sqlite.rs * Removed async_stream! from to_md.rs * Removed async_stream! from to_html.rs
221 lines
8.8 KiB
Rust
221 lines
8.8 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::prelude::*;
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use indexmap::indexmap;
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use nu_errors::ShellError;
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use nu_protocol::{ReturnSuccess, Signature, SyntaxShape, UntaggedValue, Value};
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use nu_source::Tagged;
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pub struct GroupBy;
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#[derive(Deserialize)]
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pub struct GroupByArgs {
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column_name: Option<Tagged<String>>,
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}
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#[async_trait]
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impl WholeStreamCommand for GroupBy {
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fn name(&self) -> &str {
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"group-by"
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}
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fn signature(&self) -> Signature {
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Signature::build("group-by").optional(
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"column_name",
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SyntaxShape::String,
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"the name of the column to group by",
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)
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}
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fn usage(&self) -> &str {
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"Creates a new table with the data from the table rows grouped by the column given."
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}
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async 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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group_by(args, registry).await
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}
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "Group items by type",
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example: r#"ls | group-by type"#,
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result: None,
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},
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Example {
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description: "Group items by their value",
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example: "echo [1 3 1 3 2 1 1] | group-by",
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result: Some(vec![UntaggedValue::row(indexmap! {
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"1".to_string() => UntaggedValue::Table(vec![
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UntaggedValue::int(1).into(),
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UntaggedValue::int(1).into(),
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UntaggedValue::int(1).into(),
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UntaggedValue::int(1).into(),
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]).into(),
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"3".to_string() => UntaggedValue::Table(vec![
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UntaggedValue::int(3).into(),
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UntaggedValue::int(3).into(),
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]).into(),
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"2".to_string() => UntaggedValue::Table(vec![
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UntaggedValue::int(2).into(),
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]).into(),
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})
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.into()]),
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},
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]
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}
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}
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pub async fn group_by(
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args: CommandArgs,
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registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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let registry = registry.clone();
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let name = args.call_info.name_tag.clone();
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let (GroupByArgs { column_name }, input) = args.process(®istry).await?;
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let values: Vec<Value> = input.collect().await;
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if values.is_empty() {
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Err(ShellError::labeled_error(
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"Expected table from pipeline",
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"requires a table input",
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name,
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))
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} else {
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match crate::utils::data::group(column_name, &values, None, &name) {
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Ok(grouped) => Ok(OutputStream::one(ReturnSuccess::value(grouped))),
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Err(err) => Err(err),
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}
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}
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}
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pub fn group(
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column_name: &Tagged<String>,
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values: Vec<Value>,
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tag: impl Into<Tag>,
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) -> Result<Value, ShellError> {
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crate::utils::data::group(Some(column_name.clone()), &values, None, tag)
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}
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#[cfg(test)]
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mod tests {
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use crate::commands::group_by::group;
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use indexmap::IndexMap;
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use nu_errors::ShellError;
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use nu_protocol::{UntaggedValue, Value};
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use nu_source::*;
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fn string(input: impl Into<String>) -> Value {
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UntaggedValue::string(input.into()).into_untagged_value()
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}
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fn row(entries: IndexMap<String, Value>) -> Value {
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UntaggedValue::row(entries).into_untagged_value()
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}
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fn table(list: &[Value]) -> Value {
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UntaggedValue::table(list).into_untagged_value()
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}
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fn nu_releases_commiters() -> Vec<Value> {
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vec![
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row(
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indexmap! {"name".into() => string("AR"), "country".into() => string("EC"), "date".into() => string("August 23-2019")},
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),
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row(
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indexmap! {"name".into() => string("JT"), "country".into() => string("NZ"), "date".into() => string("August 23-2019")},
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),
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row(
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indexmap! {"name".into() => string("YK"), "country".into() => string("US"), "date".into() => string("October 10-2019")},
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),
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row(
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indexmap! {"name".into() => string("AR"), "country".into() => string("EC"), "date".into() => string("Sept 24-2019")},
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),
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row(
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indexmap! {"name".into() => string("JT"), "country".into() => string("NZ"), "date".into() => string("October 10-2019")},
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),
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row(
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indexmap! {"name".into() => string("YK"), "country".into() => string("US"), "date".into() => string("Sept 24-2019")},
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),
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row(
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indexmap! {"name".into() => string("AR"), "country".into() => string("EC"), "date".into() => string("October 10-2019")},
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),
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row(
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indexmap! {"name".into() => string("JT"), "country".into() => string("NZ"), "date".into() => string("Sept 24-2019")},
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),
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row(
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indexmap! {"name".into() => string("YK"), "country".into() => string("US"), "date".into() => string("August 23-2019")},
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),
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]
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}
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#[test]
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fn groups_table_by_date_column() -> Result<(), ShellError> {
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let for_key = String::from("date").tagged_unknown();
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assert_eq!(
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group(&for_key, nu_releases_commiters(), Tag::unknown())?,
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row(indexmap! {
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"August 23-2019".into() => table(&[
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row(indexmap!{"name".into() => string("AR"), "country".into() => string("EC"), "date".into() => string("August 23-2019")}),
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row(indexmap!{"name".into() => string("JT"), "country".into() => string("NZ"), "date".into() => string("August 23-2019")}),
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row(indexmap!{"name".into() => string("YK"), "country".into() => string("US"), "date".into() => string("August 23-2019")})
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]),
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"October 10-2019".into() => table(&[
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row(indexmap!{"name".into() => string("YK"), "country".into() => string("US"), "date".into() => string("October 10-2019")}),
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row(indexmap!{"name".into() => string("JT"), "country".into() => string("NZ"), "date".into() => string("October 10-2019")}),
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row(indexmap!{"name".into() => string("AR"), "country".into() => string("EC"), "date".into() => string("October 10-2019")})
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]),
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"Sept 24-2019".into() => table(&[
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row(indexmap!{"name".into() => string("AR"), "country".into() => string("EC"), "date".into() => string("Sept 24-2019")}),
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row(indexmap!{"name".into() => string("YK"), "country".into() => string("US"), "date".into() => string("Sept 24-2019")}),
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row(indexmap!{"name".into() => string("JT"), "country".into() => string("NZ"), "date".into() => string("Sept 24-2019")})
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]),
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})
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);
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Ok(())
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}
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#[test]
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fn groups_table_by_country_column() -> Result<(), ShellError> {
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let for_key = String::from("country").tagged_unknown();
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assert_eq!(
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group(&for_key, nu_releases_commiters(), Tag::unknown())?,
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row(indexmap! {
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"EC".into() => table(&[
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row(indexmap!{"name".into() => string("AR"), "country".into() => string("EC"), "date".into() => string("August 23-2019")}),
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row(indexmap!{"name".into() => string("AR"), "country".into() => string("EC"), "date".into() => string("Sept 24-2019")}),
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row(indexmap!{"name".into() => string("AR"), "country".into() => string("EC"), "date".into() => string("October 10-2019")})
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]),
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"NZ".into() => table(&[
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row(indexmap!{"name".into() => string("JT"), "country".into() => string("NZ"), "date".into() => string("August 23-2019")}),
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row(indexmap!{"name".into() => string("JT"), "country".into() => string("NZ"), "date".into() => string("October 10-2019")}),
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row(indexmap!{"name".into() => string("JT"), "country".into() => string("NZ"), "date".into() => string("Sept 24-2019")})
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]),
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"US".into() => table(&[
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row(indexmap!{"name".into() => string("YK"), "country".into() => string("US"), "date".into() => string("October 10-2019")}),
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row(indexmap!{"name".into() => string("YK"), "country".into() => string("US"), "date".into() => string("Sept 24-2019")}),
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row(indexmap!{"name".into() => string("YK"), "country".into() => string("US"), "date".into() => string("August 23-2019")}),
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]),
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})
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);
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Ok(())
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}
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#[test]
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fn examples_work_as_expected() {
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use super::GroupBy;
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use crate::examples::test as test_examples;
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test_examples(GroupBy {})
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}
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}
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