contacts: rework: install in database
Rewrite the contacts-cache backend in c++ Store the contacts as metadata in the xapian database, rather than in a separate file. Update the Store to deal with this.
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djcb
282
lib/mu-contacts.cc
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282
lib/mu-contacts.cc
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/*
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** Copyright (C) 2019 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
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**
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** This program is free software; you can redistribute it and/or modify it
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** under the terms of the GNU General Public License as published by the
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** Free Software Foundation; either version 3, or (at your option) any
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** later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software Foundation,
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** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**
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*/
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#include "mu-contacts.hh"
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#include <mutex>
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#include <string>
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#include <unordered_map>
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#include <set>
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#include <sstream>
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#include <functional>
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#include <parser/utils.hh>
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#include <glib.h>
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using namespace Mu;
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ContactInfo::ContactInfo (const std::string& _full_address,
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const std::string& _email,
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const std::string& _name,
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bool _personal, time_t _last_seen, size_t _freq):
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full_address{_full_address},
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email{_email},
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name{_name},
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personal{_personal},
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last_seen{_last_seen},
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freq{_freq},
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tstamp{g_get_monotonic_time()} {}
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struct EmailHash {
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std::size_t operator()(const std::string& email) const {
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std::size_t djb = 5381; // djb hash
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for (const auto c : email)
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djb = ((djb << 5) + djb) + g_ascii_tolower(c);
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return djb;
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}
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};
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struct EmailEqual {
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bool operator()(const std::string& email1, const std::string& email2) const {
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return g_ascii_strcasecmp(email1.c_str(), email2.c_str()) == 0;
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}
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};
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struct ContactInfoHash {
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std::size_t operator()(const ContactInfo& ci) const {
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std::size_t djb = 5381; // djb hash
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for (const auto c : ci.email)
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djb = ((djb << 5) + djb) + g_ascii_tolower(c);
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return djb;
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}
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};
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struct ContactInfoEqual {
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bool operator()(const Mu::ContactInfo& ci1, const Mu::ContactInfo& ci2) const {
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return g_ascii_strcasecmp(ci1.email.c_str(), ci2.email.c_str()) == 0;
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}
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};
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struct ContactInfoLessThan {
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bool operator()(const Mu::ContactInfo& ci1, const Mu::ContactInfo& ci2) const {
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if (ci1.personal != ci2.personal)
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return ci1.personal; // personal comes first
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if (ci1.last_seen != ci2.last_seen) // more recent comes first
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return ci1.last_seen > ci2.last_seen;
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if (ci1.freq != ci2.freq) // more frequent comes first
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return ci1.freq > ci2.freq;
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return g_ascii_strcasecmp(ci1.email.c_str(), ci2.email.c_str()) < 0;
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}
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};
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using ContactUMap = std::unordered_map<std::string, ContactInfo, EmailHash, EmailEqual>;
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//using ContactUSet = std::unordered_set<ContactInfo, ContactInfoHash, ContactInfoEqual>;
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using ContactSet = std::set<std::reference_wrapper<const ContactInfo>, ContactInfoLessThan>;
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struct Contacts::Private {
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Private(const std::string& serialized):
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contacts_{deserialize(serialized)}
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{}
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ContactUMap deserialize(const std::string&) const;
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std::string serialize() const;
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ContactUMap contacts_;
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std::mutex mtx_;
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};
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constexpr auto Separator = "\xff"; // Invalid in UTF-8
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ContactUMap
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Contacts::Private::deserialize(const std::string& serialized) const
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{
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ContactUMap contacts;
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std::stringstream ss{serialized, std::ios_base::in};
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std::string line;
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while (getline (ss, line)) {
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const auto parts = Mux::split (line, Separator);
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if (G_UNLIKELY(parts.size() != 6)) {
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g_warning ("error: '%s'", line.c_str());
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continue;
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}
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ContactInfo ci(std::move(parts[0]), // full address
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parts[1], // email
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std::move(parts[2]), // name
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parts[3][0] == '1' ? true : false, // personal
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(time_t)g_ascii_strtoll(parts[4].c_str(), NULL, 10), // last_seen
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(std::size_t)g_ascii_strtoll(parts[5].c_str(), NULL, 10)); // freq
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contacts.emplace(std::move(parts[1]), std::move(ci));
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}
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return contacts;
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}
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Contacts::Contacts (const std::string& serialized) :
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priv_{std::make_unique<Private>(serialized)}
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{}
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Contacts::~Contacts() = default;
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std::string
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Contacts::serialize() const
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{
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std::lock_guard<std::mutex> l_{priv_->mtx_};
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std::string s;
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for (const auto& item: priv_->contacts_) {
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const auto& ci{item.second};
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s += Mux::format("%s%s"
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"%s%s"
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"%s%s"
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"%d%s"
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"%" G_GINT64_FORMAT "%s"
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"%" G_GINT64_FORMAT "\n",
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ci.full_address.c_str(), Separator,
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ci.email.c_str(), Separator,
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ci.name.c_str(), Separator,
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ci.personal ? 1 : 0, Separator,
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(gint64)ci.last_seen, Separator,
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(gint64)ci.freq);
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}
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return s;
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}
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void
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Contacts::add (ContactInfo&& ci)
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{
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std::lock_guard<std::mutex> l_{priv_->mtx_};
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auto down = g_ascii_strdown (ci.email.c_str(), -1);
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std::string email{down};
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g_free(down);
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auto it = priv_->contacts_.find(email);
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if (it != priv_->contacts_.end()) {
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auto& ci2 = it->second;
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++ci2.freq;
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if (ci.last_seen > ci2.last_seen) {
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ci2.last_seen = ci.last_seen;
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ci2.email = std::move(ci.email);
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if (!ci.name.empty())
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ci2.name = std::move(ci.name);
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}
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} else {
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priv_->contacts_.emplace(std::move(email), std::move(ci));
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}
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}
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const ContactInfo*
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Contacts::_find (const std::string& email) const
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{
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std::lock_guard<std::mutex> l_{priv_->mtx_};
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ContactInfo ci{"", email, "", false, 0};
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const auto it = priv_->contacts_.find(ci.email);
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if (it == priv_->contacts_.end())
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return {};
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else
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return &it->second;
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}
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void
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Contacts::clear()
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{
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std::lock_guard<std::mutex> l_{priv_->mtx_};
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priv_->contacts_.clear();
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}
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std::size_t
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Contacts::size() const
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{
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std::lock_guard<std::mutex> l_{priv_->mtx_};
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return priv_->contacts_.size();
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}
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void
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Contacts::for_each(const EachContactFunc& each_contact) const
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{
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std::lock_guard<std::mutex> l_{priv_->mtx_};
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if (!each_contact)
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return; // nothing to do
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// first sort them for 'rank'
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ContactSet sorted;
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for (const auto& item: priv_->contacts_)
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sorted.emplace(item.second);
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for (const auto& ci: sorted)
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each_contact (ci);
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}
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/// C binding
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size_t
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mu_contacts_count (MuContacts *self)
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{
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g_return_val_if_fail (self, 0);
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auto myself = reinterpret_cast<Mu::Contacts*>(self);
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return myself->size();
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}
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gboolean
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mu_contacts_foreach (MuContacts *self, MuContactsForeachFunc func,
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gpointer user_data)
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{
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g_return_val_if_fail (self, FALSE);
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g_return_val_if_fail (func, FALSE);
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auto myself = reinterpret_cast<Mu::Contacts*>(self);
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myself->for_each([&](const ContactInfo& ci) {
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g_return_if_fail (!ci.email.empty());
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func(ci.full_address.c_str(),
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ci.email.c_str(),
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ci.name.empty() ? NULL : ci.name.c_str(),
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ci.personal,
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ci.last_seen,
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ci.freq,
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ci.tstamp,
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user_data);
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});
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return TRUE;
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}
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struct _MuContacts : public Mu::Contacts {}; /**< c-compat */
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