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120 lines
3.2 KiB
Rust
120 lines
3.2 KiB
Rust
use flate2::read::GzDecoder;
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use ps_core::eyre::{eyre, Result};
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use ps_core::tracing;
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use std::borrow::Cow;
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use std::io::Read;
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use std::path::{Path, PathBuf};
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use super::super::shared::parse::ParseableEmail;
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use ps_core::EmailMeta;
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/// Raw representation of an email.
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/// Contains the paths to the relevant files as well
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/// as the name of the folder the email was in.
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#[derive(Debug)]
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pub struct RawEmailEntry {
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#[allow(unused)]
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folder_name: String,
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eml_path: PathBuf,
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gmail_meta_path: Option<PathBuf>,
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is_compressed: bool,
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#[allow(unused)]
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size: u64,
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}
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impl RawEmailEntry {
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pub fn path(&self) -> &Path {
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self.eml_path.as_path()
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}
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pub fn read(&self) -> Result<Vec<u8>> {
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if self.is_compressed {
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let reader = std::fs::File::open(&self.eml_path)?;
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let mut decoder = GzDecoder::new(reader);
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let mut buffer = Vec::new();
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decoder.read_to_end(&mut buffer)?;
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Ok(buffer)
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} else {
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std::fs::read(&self.eml_path).map_err(|e| eyre!("IO Error: {}", &e))
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}
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}
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pub fn has_gmail_meta(&self) -> bool {
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self.gmail_meta_path.is_some()
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}
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pub fn read_gmail_meta(&self) -> Option<Result<Vec<u8>>> {
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// Just using map here returns a `&Option` whereas we want `Option`
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#[allow(clippy::manual_map)]
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match &self.gmail_meta_path {
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Some(p) => Some(std::fs::read(p).map_err(|e| eyre!("IO Error: {}", &e))),
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None => None,
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}
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}
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}
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impl RawEmailEntry {
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pub(super) fn new<P: AsRef<std::path::Path>>(path: P) -> Option<RawEmailEntry> {
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let path = path.as_ref();
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let stem = path.file_stem()?.to_str()?;
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let name = path.file_name()?.to_str()?;
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let is_eml_gz = name.ends_with(".eml.gz");
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let is_eml = name.ends_with(".eml");
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if !is_eml_gz && !is_eml {
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return None;
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}
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let is_compressed = is_eml_gz;
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let folder_name = path.parent()?.file_name()?.to_str()?.to_owned();
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let eml_path = path.to_path_buf();
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let file_metadata = path.metadata().ok()?;
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// Build a meta path
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let meta_path = path
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.parent()?
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.join(format!("{}.meta", stem.replace(".eml", "")));
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// Only embed it, if it exists
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let gmail_meta_path = if meta_path.exists() {
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Some(meta_path)
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} else {
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None
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};
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tracing::trace!(
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"Email [c?: {}] {} {:?}",
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is_compressed,
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eml_path.display(),
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gmail_meta_path
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);
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Some(RawEmailEntry {
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folder_name,
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eml_path,
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gmail_meta_path,
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is_compressed,
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size: file_metadata.len(),
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})
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}
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}
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impl ParseableEmail for RawEmailEntry {
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fn prepare(&mut self) -> Result<()> {
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Ok(())
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}
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fn message(&self) -> Result<Cow<'_, [u8]>> {
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Ok(Cow::Owned(self.read()?))
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}
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fn path(&self) -> &Path {
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self.eml_path.as_path()
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}
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fn meta(&self) -> Result<Option<EmailMeta>> {
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if self.has_gmail_meta() {
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Ok(Some(super::meta::parse_meta(self)?.into()))
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} else {
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Ok(None)
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}
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}
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}
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