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