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use serde_json;
use source::Source;
use std::error::Error;
use value::Value;
pub struct Content {
// Root table of the TOML document
root: serde_json::Value,
}
impl Content {
pub fn parse(text: &str) -> Result<Box<Source>, Box<Error>> {
// Parse
let root = serde_json::from_str(text)?;
Ok(Box::new(Content { root: root }))
}
}
fn from_json_value(value: &serde_json::Value) -> Option<Value> {
match *value {
serde_json::Value::String(ref value) => Some(Value::String(value.clone())),
serde_json::Value::Number(ref value) => {
if let Some(value) = value.as_i64() {
Some(Value::Integer(value))
} else if let Some(value) = value.as_f64() {
Some(Value::Float(value))
} else {
None
}
}
serde_json::Value::Bool(value) => Some(Value::Boolean(value)),
_ => None,
}
}
impl Source for Content {
fn get(&self, key: &str) -> Option<Value> {
// TODO: Key segment iteration is not something that should be here directly
let key_delim = '.';
let key_segments = key.split(key_delim);
let mut json_cursor = &self.root;
for segment in key_segments {
match *json_cursor {
serde_json::Value::Object(ref table) => {
if let Some(value) = table.get(segment) {
json_cursor = value;
}
}
_ => {
// This is not a table or array
// Traversal is not possible
return None;
}
}
}
from_json_value(json_cursor)
}
}
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