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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/permissions/permission_request_queue.h"
#include "base/ranges/algorithm.h"
#include "components/permissions/permission_request.h"
#include "components/permissions/permission_util.h"
namespace permissions {
PermissionRequestQueue::PermissionRequestQueue()
: queued_requests_(static_cast<size_t>(Priority::kNum)) {}
PermissionRequestQueue::~PermissionRequestQueue() = default;
bool PermissionRequestQueue::IsEmpty() const {
return !size_;
}
size_t PermissionRequestQueue::Count(PermissionRequest* request) const {
size_t count = 0;
for (const auto& request_list : queued_requests_) {
count += base::ranges::count(request_list, request);
}
return count;
}
void PermissionRequestQueue::Push(PermissionRequest* request) {
Priority priority = DetermineRequestPriority(request);
// High priority requests are always pushed to the back since they don't use
// the chip.
if (priority == Priority::kHigh) {
PushBackInternal(request, priority);
return;
}
// If the platform does not support the chip, push to the back.
if (!PermissionUtil::DoesPlatformSupportChip()) {
PushBackInternal(request, priority);
return;
}
// Otherwise push to the front since chip requests use FILO ordering.
PushFrontInternal(request, priority);
}
void PermissionRequestQueue::PushFront(
permissions::PermissionRequest* request) {
Priority priority = DetermineRequestPriority(request);
PushFrontInternal(request, priority);
}
void PermissionRequestQueue::PushBack(permissions::PermissionRequest* request) {
Priority priority = DetermineRequestPriority(request);
PushBackInternal(request, priority);
}
PermissionRequest* PermissionRequestQueue::Pop() {
std::vector<base::circular_deque<PermissionRequest*>>::reverse_iterator it;
CHECK(!IsEmpty());
// Skip entries that contain empty queues.
for (it = queued_requests_.rbegin();
it != queued_requests_.rend() && it->empty(); ++it) {
}
CHECK(it != queued_requests_.rend());
PermissionRequest* front = it->front();
it->pop_front();
--size_;
return front;
}
PermissionRequest* PermissionRequestQueue::Peek() const {
CHECK(!IsEmpty());
std::vector<base::circular_deque<PermissionRequest*>>::const_reverse_iterator
it;
// Skip entries that contain empty queues.
for (it = queued_requests_.rbegin();
it != queued_requests_.rend() && it->empty(); ++it) {
}
CHECK(it != queued_requests_.rend());
return it->front();
}
PermissionRequest* PermissionRequestQueue::FindDuplicate(
PermissionRequest* request) const {
auto priority = DetermineRequestPriority(request);
const auto& queued_request_list =
queued_requests_[static_cast<size_t>(priority)];
for (PermissionRequest* queued_request : queued_request_list) {
if (request->IsDuplicateOf(queued_request)) {
return queued_request;
}
}
return nullptr;
}
PermissionRequestQueue::const_iterator PermissionRequestQueue::begin() const {
return queued_requests_.begin();
}
PermissionRequestQueue::const_iterator PermissionRequestQueue::end() const {
return queued_requests_.end();
}
// static
PermissionRequestQueue::Priority
PermissionRequestQueue::DetermineRequestPriority(
permissions::PermissionRequest* request) {
if (request->IsEmbeddedPermissionElementInitiated()) {
return Priority::kHigh;
}
if (permissions::PermissionUtil::DoesPlatformSupportChip() &&
permissions::PermissionUtil::IsLowPriorityPermissionRequest(request)) {
return Priority::kLow;
}
return Priority::kMedium;
}
void PermissionRequestQueue::PushFrontInternal(
permissions::PermissionRequest* request,
Priority priority) {
queued_requests_[static_cast<size_t>(priority)].push_front(request);
++size_;
}
void PermissionRequestQueue::PushBackInternal(
permissions::PermissionRequest* request,
Priority priority) {
queued_requests_[static_cast<size_t>(priority)].push_back(request);
++size_;
}
} // namespace permissions
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