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/* Copyright 2016 Software Freedom Conservancy Inc.
*
* This software is licensed under the GNU Lesser General Public License
* (version 2.1 or later). See the COPYING file in this distribution.
*/
namespace Spit.DataImports {
/**
* Photo source implementation for alien databases. This class is responsible
* for extracting meta-data out of a source photo to support the import
* process.
*
* This class does not extend PhotoSource in order to minimise the API to the
* absolute minimum required to run the import job.
*/
public class DataImportSource {
private bool backing_file_found;
private ImportableMediaItem db_photo;
private string? title = null;
private string? preview_md5 = null;
private uint64 file_size;
private time_t modification_time;
private MetadataDateTime? exposure_time;
public DataImportSource(ImportableMediaItem db_photo) {
this.db_photo = db_photo;
// A well-behaved plugin will ensure that the path and file name are
// not null but we check just in case
string folder_path = db_photo.get_folder_path();
string filename = db_photo.get_filename();
File? photo = null;
if (folder_path != null && filename != null) {
photo = File.new_for_path(db_photo.get_folder_path()).
get_child(db_photo.get_filename());
backing_file_found = photo.query_exists();
} else {
backing_file_found = false;
}
if (photo != null && backing_file_found) {
PhotoMetadata? metadata = new PhotoMetadata();
try {
metadata.read_from_file(photo);
} catch(Error e) {
warning("Could not get file metadata for %s: %s", get_filename(), e.message);
metadata = null;
}
title = db_photo.get_title();
if (title == null) {
title = (metadata != null) ? metadata.get_title() : null;
}
time_t? date_time = db_photo.get_exposure_time();
if (date_time != null) {
exposure_time = new MetadataDateTime(date_time);
} else {
exposure_time = (metadata != null) ? metadata.get_exposure_date_time() : null;
}
PhotoPreview? preview = metadata != null ? metadata.get_preview(0) : null;
if (preview != null) {
try {
uint8[] preview_raw = preview.flatten();
preview_md5 = md5_binary(preview_raw, preview_raw.length);
} catch(Error e) {
warning("Could not get raw preview for %s: %s", get_filename(), e.message);
}
}
#if TRACE_MD5
debug("Photo MD5 %s: preview=%s", get_filename(), preview_md5);
#endif
try {
file_size = query_total_file_size(photo);
} catch(Error e) {
warning("Could not get file size for %s: %s", get_filename(), e.message);
}
try {
modification_time = query_file_modified(photo);
} catch(Error e) {
warning("Could not get modification time for %s: %s", get_filename(), e.message);
}
} else {
debug ("Photo file %s not found".printf(photo.get_path()));
}
}
public string get_filename() {
return db_photo.get_filename();
}
public string get_fulldir() {
return db_photo.get_folder_path();
}
public File get_file() {
return File.new_for_path(get_fulldir()).get_child(get_filename());
}
public string get_name() {
return !is_string_empty(title) ? title : get_filename();
}
public string? get_title() {
return title;
}
public PhotoFileFormat get_file_format() {
return PhotoFileFormat.get_by_basename_extension(get_filename());
}
public string to_string() {
return get_name();
}
public time_t get_exposure_time() {
return (exposure_time != null) ? exposure_time.get_timestamp() : modification_time;
}
public uint64 get_filesize() {
return file_size;
}
public ImportableMediaItem get_photo() {
return db_photo;
}
public bool is_already_imported() {
// ignore trashed duplicates
return (preview_md5 != null)
? LibraryPhoto.has_nontrash_duplicate(null, preview_md5, null, get_file_format())
: false;
}
public bool was_backing_file_found() {
return backing_file_found;
}
}
}
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