125 lines
4.4 KiB
Rust
125 lines
4.4 KiB
Rust
use std::sync::Arc;
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use super::Extractor;
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use crate::{
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addressing::Address,
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database::{
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constants,
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entry::{Entry, EntryValue},
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stores::{fs::FILE_MIME_KEY, UpStore},
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UpEndConnection,
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},
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util::jobs::{JobContainer, JobState},
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};
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use anyhow::{anyhow, Result};
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pub struct ExifExtractor;
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// TODO: EXIF metadata is oftentimes a constant/enum value. What's the proper
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// model for enum-like values in UpEnd?
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impl Extractor for ExifExtractor {
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fn get(
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&self,
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address: &Address,
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_connection: &UpEndConnection,
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store: Arc<Box<dyn UpStore + Send + Sync>>,
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mut job_container: JobContainer,
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) -> Result<Vec<Entry>> {
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if let Address::Hash(hash) = address {
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let files = store.retrieve(hash)?;
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if let Some(file) = files.get(0) {
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let file_path = file.get_file_path();
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let mut job_handle = job_container.add_job(
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None,
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&format!(
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r#"Getting EXIF info from "{:}""#,
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file_path
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.components()
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.last()
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.unwrap()
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.as_os_str()
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.to_string_lossy()
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),
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)?;
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let file = std::fs::File::open(file_path)?;
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let mut bufreader = std::io::BufReader::new(&file);
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let exifreader = exif::Reader::new();
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let exif = exifreader.read_from_container(&mut bufreader)?;
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let result: Vec<Entry> = exif
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.fields()
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.filter(|field| !matches!(field.value, exif::Value::Undefined(..)))
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.flat_map(|field| {
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if let Some(tag_description) = field.tag.description() {
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let attribute = format!("EXIF_{}", field.tag.1);
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vec![
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Entry {
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entity: address.clone(),
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attribute: attribute.clone(),
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value: match field.tag {
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exif::Tag::ExifVersion => {
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EntryValue::String(format!("{}", field.display_value()))
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}
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_ => EntryValue::guess_from(format!(
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"{}",
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field.display_value()
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)),
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},
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provenance: "SYSTEM EXTRACTOR".to_string(),
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timestamp: chrono::Utc::now().naive_utc(),
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},
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Entry {
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entity: Address::Attribute(attribute),
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attribute: constants::LABEL_ATTR.into(),
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value: format!("EXIF: {}", tag_description).into(),
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provenance: "SYSTEM EXTRACTOR".to_string(),
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timestamp: chrono::Utc::now().naive_utc(),
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},
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]
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} else {
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vec![]
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}
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})
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.collect();
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let _ = job_handle.update_state(JobState::Done);
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Ok(result)
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} else {
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Err(anyhow!("Couldn't find file for {hash:?}!"))
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}
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} else {
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Ok(vec![])
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}
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}
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fn is_needed(&self, address: &Address, connection: &UpEndConnection) -> Result<bool> {
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let is_photo = connection.retrieve_object(address)?.iter().any(|e| {
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if e.attribute == FILE_MIME_KEY {
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if let EntryValue::String(mime) = &e.value {
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return mime.starts_with("image");
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}
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}
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false
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});
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if !is_photo {
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return Ok(false);
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}
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let is_extracted = !connection
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.query(format!("(matches @{} (contains \"EXIF\") ?)", address).parse()?)?
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.is_empty();
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if is_extracted {
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return Ok(false);
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}
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Ok(true)
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}
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}
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