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use params::{Map, Value};
pub fn validate_min(values: &Map, field: &[&str], target: isize) -> Result<Option<Value>, String> {
match values.find(field) {
Some(&Value::String(ref value)) => {
if value.is_empty() {
// Allow empty values
return Ok(None);
}
assert!(target >= 0);
if value.len() >= target as usize {
Ok(None)
} else {
Err(format!("The {} field must be at least {} characters.",
field.last()
.unwrap()
.to_lowercase()
.replace("_", " "),
target))
}
}
Some(&Value::U64(ref value)) => {
if target <= 0 || *value >= target as u64 {
Ok(None)
} else {
Err(format!("The {} field must be at least {}.",
field.last()
.unwrap()
.to_lowercase()
.replace("_", " "),
target))
}
}
Some(&Value::I64(ref value)) => {
if *value >= target as i64 {
Ok(None)
} else {
Err(format!("The {} field must be at least {}.",
field.last()
.unwrap()
.to_lowercase()
.replace("_", " "),
target))
}
}
Some(&Value::F64(ref value)) => {
if *value >= target as f64 {
Ok(None)
} else {
Err(format!("The {} field must be at least {}.",
field.last()
.unwrap()
.to_lowercase()
.replace("_", " "),
target))
}
}
Some(&Value::Array(ref value)) => {
if value.is_empty() {
// Allow empty values
return Ok(None);
}
assert!(target >= 0);
if value.len() >= target as usize {
Ok(None)
} else {
Err(format!("The {} field must have at least {} items.",
field.last()
.unwrap()
.to_lowercase()
.replace("_", " "),
target))
}
}
Some(&Value::Map(ref value)) => {
if value.is_empty() {
// Allow empty values
return Ok(None);
}
assert!(target >= 0);
if value.len() >= target as usize {
Ok(None)
} else {
Err(format!("The {} field must have at least {} items.",
field.last()
.unwrap()
.to_lowercase()
.replace("_", " "),
target))
}
}
Some(&Value::File(ref value)) => {
assert!(target >= 0);
if value.size >> 10 >= target as u64 {
Ok(None)
} else {
Err(format!("The {} must be at least {} kilobytes.",
field.last()
.unwrap()
.to_lowercase()
.replace("_", " "),
target))
}
}
None => {
// Allow empty values
Ok(None)
}
_ => {
Err(format!("The {} field must have at least a size of {}.",
field.last()
.unwrap()
.to_lowercase()
.replace("_", " "),
target))
}
}
}