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add support for average on byte columns and fmt the code

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This commit is contained in:
notryanb@gmail.com 2019-10-13 21:08:14 -04:00
parent 0e86430ea3
commit 8262c2dd33
1 changed files with 65 additions and 53 deletions
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118
src/plugins/average.rs
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@ -1,6 +1,6 @@
use nu::{
serve_plugin, CoerceInto, CallInfo, Plugin, Primitive, ReturnSuccess, ReturnValue, ShellError, Signature,
Tagged, TaggedItem, Value,
serve_plugin, CallInfo, CoerceInto, Plugin, Primitive, ReturnSuccess, ReturnValue, ShellError,
Signature, Tagged, TaggedItem, Value,
};
#[derive(Debug)]
@ -11,56 +11,61 @@ struct Average {
impl Average {
fn new() -> Average {
Average { total: None, count: 1 }
Average {
total: None,
count: 0,
}
}
fn average(&mut self, value: Tagged<Value>) -> Result<(), ShellError> {
match value.item() {
Value::Primitive(Primitive::Nothing) => Ok(()),
Value::Primitive(Primitive::Int(i)) => {
match &self.total {
Some(Tagged {
item: Value::Primitive(Primitive::Int(j)),
tag,
}) => {
self.total = Some(Value::int(i + j).tagged(tag));
self.count = self.count + 1;
Ok(())
}
None => {
self.total = Some(value.clone());
Ok(())
}
_ => Err(ShellError::string(format!(
"Could not calculate average of non-integer or unrelated types"
))),
Value::Primitive(Primitive::Int(i)) => match &self.total {
Some(Tagged {
item: Value::Primitive(Primitive::Int(j)),
tag,
}) => {
self.total = Some(Value::int(i + j).tagged(tag));
self.count += 1;
Ok(())
}
}
Value::Primitive(Primitive::Bytes(b)) => {
match self.total {
Some(Tagged {
item: Value::Primitive(Primitive::Bytes(j)),
tag,
}) => {
self.total = Some(Value::int(b + j).tagged(tag));
self.count = self.count + 1;
Ok(())
}
None => {
self.total = Some(value);
Ok(())
}
_ => Err(ShellError::string(format!(
"Could not calculate average of non-integer or unrelated types"
))),
None => {
self.total = Some(value.clone());
self.count += 1;
Ok(())
}
}
x => Err(ShellError::string(format!(
"Unrecognized type in stream: {:?}",
x
))),
_ => Err(ShellError::labeled_error(
"Could calculate average of non-integer or unrelated types",
"source",
value.tag,
)),
},
Value::Primitive(Primitive::Bytes(b)) => match &self.total {
Some(Tagged {
item: Value::Primitive(Primitive::Bytes(j)),
tag,
}) => {
self.total = Some(Value::bytes(b + j).tagged(tag));
self.count += 1;
Ok(())
}
None => {
self.total = Some(value);
self.count += 1;
Ok(())
}
_ => Err(ShellError::labeled_error(
"Could calculate average of non-integer or unrelated types",
"source",
value.tag,
)),
},
x => Err(ShellError::labeled_error(
format!("Unrecognized type in stream: {:?}", x),
"source",
value.tag,
)),
}
}
}
@ -83,19 +88,27 @@ impl Plugin for Average {
fn end_filter(&mut self) -> Result<Vec<ReturnValue>, ShellError> {
match self.total {
None => Ok(vec![]),
Some(ref v) => {
match v.item() {
Some(ref inner) => {
match inner.item() {
Value::Primitive(Primitive::Int(i)) => {
let total: u64 = i.tagged(v.tag).coerce_into("converting for average")?;
let total: u64 = i
.tagged(inner.tag.clone())
.coerce_into("converting for average")?;
let avg = total as f64 / self.count as f64;
let decimal_value: Value= Primitive::from(avg).into();
let tagged_value = decimal_value.tagged(v.tag);
let primitive_value: Value = Primitive::from(avg).into();
let tagged_value = primitive_value.tagged(inner.tag.clone());
Ok(vec![ReturnSuccess::value(tagged_value)])
}
_ => unreachable!()
Value::Primitive(Primitive::Bytes(bytes)) => {
// let total: u64 = b.tagged(inner.tag.clone()).coerce_into("converting for average")?;
let avg = *bytes as f64 / self.count as f64;
let primitive_value: Value = Primitive::from(avg).into();
let tagged_value = primitive_value.tagged(inner.tag.clone());
Ok(vec![ReturnSuccess::value(tagged_value)])
}
_ => Ok(vec![]),
}
},
}
}
}
}
@ -103,4 +116,3 @@ impl Plugin for Average {
fn main() {
serve_plugin(&mut Average::new());
}