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/*
Copyright (C) 2021-2024 Selwin van Dijk
This file is part of signalbackup-tools.
signalbackup-tools is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
signalbackup-tools is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with signalbackup-tools. If not, see <https://www.gnu.org/licenses/>.
*/
#include "signalbackup.ih"
#include "../attachmentmetadata/attachmentmetadata.h"
bool SignalBackup::deleteAttachments(std::vector<long long int> const &threadids,
std::string const &before, std::string const &after,
long long int filesize, std::vector<std::string> const &mimetypes,
std::string const &append, std::string const &prepend,
std::vector<std::pair<std::string, std::string>> replace)
{
std::string query_delete("DELETE FROM " + d_part_table);
std::string query_list("SELECT _id," + d_part_mid + "," +
(d_database.tableContainsColumn(d_part_table, "unique_id") ? "unique_id" : "-1 AS unique_id") +
"," + d_part_ct + ",quote FROM " + d_part_table);
std::string specification;
if (!threadids.empty() && threadids[0] != -1) // -1 indicates 'ALL', easier not to specify
{
if (specification.empty())
specification += " WHERE " + d_part_mid + " IN (SELECT _id FROM " + d_mms_table + " WHERE ";
else
specification += " AND ";
for (unsigned int i = 0; i < threadids.size(); ++i)
specification += ((i == 0) ? "("s : ""s) + "thread_id IS " + bepaald::toString(threadids[i]) + ((i == threadids.size() - 1) ? ")" : " OR ");
}
if (!before.empty())
{
long long int date = dateToMSecsSinceEpoch(before);
if (date == -1)
Logger::warning("Ignoring before-date: '", before, "'. Failed to parse or invalid.");
else
{
if (specification.empty())
specification += " WHERE " + d_part_mid + " IN (SELECT _id FROM " + d_mms_table + " WHERE ";
else
specification += " AND ";
specification += "date_received < " + bepaald::toString(date);
}
}
if (!after.empty())
{
long long int date = dateToMSecsSinceEpoch(after);
if (date == -1)
Logger::warning("Ignoring after-date: '", after, "'. Failed to parse or invalid.");
else
{
if (specification.empty())
specification += " WHERE " + d_part_mid + " IN (SELECT _id FROM " + d_mms_table + " WHERE ";
else
specification += " AND ";
specification += "date_received > " + bepaald::toString(date);
}
}
if (!specification.empty())
specification += ")";
if (filesize >= 0)
{
if (specification.empty())
specification += " WHERE ";
else
specification += " AND ";
specification += "data_size > " + bepaald::toString(filesize);
}
if (!mimetypes.empty())
{
if (specification.empty())
specification += " WHERE ";
else
specification += " AND ";
for (unsigned int i = 0; i < mimetypes.size(); ++i)
specification += ((i == 0) ? "("s : ""s) + d_part_ct + " LIKE \"" + mimetypes[i] + "%\"" + ((i == mimetypes.size() - 1) ? ")" : " OR ");
}
query_delete += specification;
query_list += specification;
//std::cout << query_list << std::endl;
SqliteDB::QueryResults res;
if (!d_database.exec(query_list, &res))
{
Logger::error("Failed to execute query.");
return false;
}
//res.prettyPrint();
// just delete the attachments
if (replace.empty())
{
if (!d_database.exec(query_delete))
{
Logger::error("Failed to execute query.");
return false;
}
Logger::message("Deleted: ", d_database.changed(), " 'part'-entries.");
// find all mms entries to which the deleted attachments belonged
// if no attachments remain and body is empty -> delete mms -> cleanDatabaseByMessages()
SqliteDB::QueryResults res2;
long long int count = 0;
for (unsigned int i = 0; i < res.rows(); ++i)
{
if (!append.empty() || !prepend.empty())
{
// update existing message bodies
if (!append.empty())
{
if (!d_database.exec("UPDATE " + d_mms_table + " SET body = body || ? WHERE _id = ? AND (body IS NOT NULL AND body != '')", {"\n\n" + append, res.getValueAs<long long int>(i, d_part_mid)}))
return false;
if (!d_database.exec("UPDATE " + d_mms_table + " SET body = ? WHERE _id = ? AND (body IS NULL OR body == '')", {append, res.getValueAs<long long int>(i, d_part_mid)}))
return false;
}
if (!prepend.empty())
{
// update message ranges if present:
std::pair<std::shared_ptr<unsigned char []>, size_t> brdata =
d_database.getSingleResultAs<std::pair<std::shared_ptr<unsigned char []>, size_t>>("SELECT " + d_mms_ranges + " FROM " + d_mms_table + " WHERE LENGTH(" + d_mms_ranges + ") != 0 AND _id = ?",
res.getValueAs<long long int>(i, d_part_mid), {nullptr, 0});
if (brdata.second)
{
BodyRanges brsproto(brdata);
//brsproto.print();
BodyRanges new_bodyrange_vec;
auto bodyrange_vec = brsproto.getField<1>();
for (auto const &bodyrange : bodyrange_vec)
{
BodyRange new_bodyrange = bodyrange;
int start = new_bodyrange.getField<1>().value_or(-1);
if (start != -1) [[likely]]
{
new_bodyrange.deleteFields(1);
new_bodyrange.addField<1>(start + prepend.size() + 2); // plus two for the extra new lines
//new_bodyrange.print();
}
new_bodyrange_vec.addField<1>(new_bodyrange);
}
if (!d_database.exec("UPDATE " + d_mms_table + " SET " + d_mms_ranges + " = ? WHERE _id = ?",
{std::make_pair(new_bodyrange_vec.data(), static_cast<size_t>(new_bodyrange_vec.size())), res.getValueAs<long long int>(i, d_part_mid)}))
return false;
}
// update mentions if present
d_database.exec("UPDATE mention SET range_start = range_start + ? WHERE message_id = ?", {prepend.size() + 2, res.getValueAs<long long int>(i, d_part_mid)});
if (d_verbose) [[unlikely]]
Logger::message("Updated ", d_database.changed(), " mention to adjust for prependbody");
if (!d_database.exec("UPDATE " + d_mms_table + " SET body = ? || body WHERE _id = ? AND (body IS NOT NULL AND body != '')",
{prepend + "\n\n", res.getValueAs<long long int>(i, d_part_mid)}))
return false;
if (!d_database.exec("UPDATE " + d_mms_table + " SET body = ? WHERE _id = ? AND (body IS NULL OR body == '')",
{prepend, res.getValueAs<long long int>(i, d_part_mid)}))
return false;
}
}
else // no append/prepend -> delete message if body empty
{
// check if message has other attachments
if (!d_database.exec("SELECT _id FROM " + d_part_table
+ " WHERE " + d_part_mid + " = ?", res.getValueAs<long long int>(i, d_part_mid), &res2))
return false;
if (res2.empty()) // no other attachments for this message, we can delete if body is empty
{
//std::cout << "no other attachments (" << i << ")" << std::endl;
// delete message if body empty
if (!d_database.exec("DELETE FROM " + d_mms_table + " WHERE _id = ? AND (body IS NULL OR body == '')", res.getValueAs<long long int>(i, d_part_mid)))
return false;
if (d_database.changed() == 1)
{
++count;
continue;
}
}
}
}
if (count || (append.empty() && prepend.empty()))
Logger::message("Deleted ", count, " empty messages");
// make sure the 'mms.previews' column does not reference non-existing attachments
long long int maxlinkpreviews = d_database.getSingleResultAs<long long int>("SELECT MAX(json_array_length(" + d_mms_previews + ")) FROM " + d_mms_table, 0);
for (unsigned int lp = 0; lp < maxlinkpreviews; ++lp)
{
//d_database.print("SELECT " + d_mms_previews + " FROM " + d_mms_table + " WHERE " + d_mms_previews + " IS NOT NULL");
if (d_database.tableContainsColumn(d_part_table, "unique_id"))
d_database.exec("UPDATE " + d_mms_table + " SET " + d_mms_previews + " = json_set(" + d_mms_previews + ", '$[" + bepaald::toString(lp) + "].attachmentId', json(null)) WHERE "
"json_extract(" + d_mms_previews + ", '$[" + bepaald::toString(lp) + "].attachmentId.rowId') NOT IN (SELECT _id FROM " + d_part_table + ") AND "
"json_extract(" + d_mms_previews + ", '$[" + bepaald::toString(lp) + "].attachmentId.uniqueId') NOT IN (SELECT unique_id FROM " + d_part_table +")");
else
d_database.exec("UPDATE " + d_mms_table + " SET " + d_mms_previews + " = json_set(" + d_mms_previews + ", '$[" + bepaald::toString(lp) + "].attachmentId', json(null)) WHERE "
"json_extract(" + d_mms_previews + ", '$[" + bepaald::toString(lp) + "].attachmentId.rowId') NOT IN (SELECT _id FROM " + d_part_table + ")");
//d_database.print("SELECT " + d_mms_previews + " FROM " + d_mms_table + " WHERE " + d_mms_previews + " IS NOT NULL");
}
cleanAttachments();
cleanDatabaseByMessages();
return true;
}
// else replace attachments
std::sort(replace.begin(), replace.end(), [](std::pair<std::string, std::string> const &lhs, std::pair<std::string, std::string> const &rhs)
{
return (lhs.first == "default" ? false : (rhs.first == "default" ? true : lhs.first.length() > rhs.first.length()));
});
for (unsigned int i = 0; i < res.rows(); ++i)
{
// get ct (mimetype), if it matches replace[i].first -> replace with replace[i].second
std::string mimetype = res.valueAsString(i, d_part_ct);
Logger::message("Checking to replace attachment: ", mimetype);
for (unsigned int j = 0; j < replace.size(); ++j)
{
if (res.valueAsString(i, d_part_ct).find(replace[j].first) == 0 || replace[j].first == "default")
{
// replace with replace[j].second
auto attachment = d_attachments.find({res.getValueAs<long long int>(i, "_id"), res.getValueAs<long long int>(i, "unique_id")});
if (attachment == d_attachments.end())
{
Logger::warning("Failed to find attachment with this part entry");
continue;
}
AttachmentMetadata amd = AttachmentMetadata::getAttachmentMetaData(replace[j].second);
if (!amd)
{
Logger::message("Failed to get metadata on new attachment: \"", replace[j].second, "\", skipping...");
continue;
}
if (!updatePartTableForReplace(amd, res.getValueAs<long long int>(i, "_id")))
//if (!d_database.exec("UPDATE part SET ct = ?, data_size = ?, width = ?, height = ?, data_hash = ? WHERE _id = ?",
// {newmimetype, newdatasize, newwidth, newheight, newhash, res.getValueAs<long long int>(i, "_id")}) ||
// d_database.changed() != 1)
return false;
attachment->second->setLength(amd.filesize);
//attachment->second->setLazyDataRAW(amd.filesize, replace[j].second);
attachment->second->setReader(new RawFileAttachmentReader(replace[j].second));
Logger::message("Replaced attachment at ", i + 1, "/", res.rows(), " with file \"", replace[j].second, "\"");
break;
}
}
// replacing -> delete where _id = res[i][_id]
// insert into (_id, mid, unique_id, ct, data_size, quote, ...) values(..., ... ,)
}
return true;
}
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