oox 0.1.0

Open Office XML file format deserializer
Documentation 
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use crate::xml::XmlNode;
use std::{
    io::{Read, Seek},
    str::FromStr,
};
use zip::read::ZipFile;

type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;

#[derive(Debug, Clone, PartialEq, Default)]
pub struct AppInfo {
    pub app_name: Option<String>,
    pub app_version: Option<String>,
}

impl AppInfo {
    pub fn from_zip<R>(zipper: &mut zip::ZipArchive<R>) -> Result<Self>
    where
        R: Read + Seek,
    {
        let mut app_xml_file = zipper.by_name("docProps/app.xml")?;
        Self::from_zip_file(&mut app_xml_file)
    }

    pub fn from_zip_file(zip_file: &mut ZipFile) -> Result<Self> {
        let mut xml_string = String::new();
        zip_file.read_to_string(&mut xml_string)?;
        let root = XmlNode::from_str(&xml_string)?;

        Ok(root
            .child_nodes
            .iter()
            .fold(Default::default(), |mut instance: Self, child_node| {
                match child_node.local_name() {
                    "Application" => instance.app_name = child_node.text.as_ref().cloned(),
                    "AppVersion" => instance.app_version = child_node.text.as_ref().cloned(),
                    _ => (),
                }

                instance
            }))
    }
}
#[derive(Debug, Clone, PartialEq, Default)]
pub struct Core {
    pub title: Option<String>,
    pub creator: Option<String>,
    pub last_modified_by: Option<String>,
    pub revision: Option<i32>,
    pub created_time: Option<String>,  // TODO: maybe store as some DateTime struct?
    pub modified_time: Option<String>, // TODO: maybe store as some DateTime struct?
}

impl Core {
    pub fn from_zip<R>(zipper: &mut zip::ZipArchive<R>) -> Result<Self>
    where
        R: Read + Seek,
    {
        let mut core_xml_file = zipper.by_name("docProps/core.xml")?;
        Self::from_zip_file(&mut core_xml_file)
    }

    pub fn from_zip_file(zip_file: &mut ZipFile) -> Result<Self> {
        let mut xml_string = String::new();
        zip_file.read_to_string(&mut xml_string)?;
        let root = XmlNode::from_str(&xml_string)?;

        root.child_nodes
            .iter()
            .try_fold(Default::default(), |mut instance: Self, child_node| {
                match child_node.local_name() {
                    "title" => instance.title = child_node.text.as_ref().cloned(),
                    "creator" => instance.creator = child_node.text.as_ref().cloned(),
                    "lastModifiedBy" => instance.last_modified_by = child_node.text.as_ref().cloned(),
                    "revision" => instance.revision = child_node.text.as_ref().map(|s| s.parse()).transpose()?,
                    "created" => instance.created_time = child_node.text.as_ref().cloned(),
                    "modified" => instance.modified_time = child_node.text.as_ref().cloned(),
                    _ => (),
                }

                Ok(instance)
            })
    }
}