Add queue system with background downloading and much more (#73)

* Do not build here until it is merged.

* WIP: Queue System.

Right now crashes randomly for whatever reason..

* Animate queue spinner more slowly

* Use LightLocks to prevent crashing in the queue

(I hope it's fixed at least)

* Build nightlies in queue-system

* Use version.h for version and specify 7 digits

* Remove unneeded $(CURDIR)

I put that these for testing, but it's not needed

* Multiple Changes, see desc for more.

1.) Theme Implementation.
2.) Show Battery + Time.
3.) Some more work on Queue-System (might still be broke).
4.) Update Copyright to 2021.
5.) Add `%FIRM%` to regex.
6.) Mass Add to Queue.
7.) Search with AND / OR filter.

* Gaaah, not again...

* Remove DoNothing, some LightLock changes, etc

aka
Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.

* See desc for more.

- Current Queue Entry can now be canceled.

- Fix installed list.

- Display Download Speed.

- BYE BYE Queue LightLock!

* Various adjustments to the queue menu

- Make cancel button slightly smaller
- Right align "Steps: ..." text
- Remove "Current Operation:" text
- Change KB/MB/GB to KiB/MiB/GiB
- Lots of little positioning tweaks
- Fix bug where you could get stuck in the prompt
- Make spinny thing have a ! when action is needed
- Make extracting file increment at the start instead of the end
- Delete dumb VS Code file and gitignore it

* Change to hollow full charge plugged in icon

* Fix the settings positions a bit

* Fix custom font download not having prompt

Also tweak the text positions, I forgot to change them

Co-authored-by: StackZ <47382115+SuperSaiyajinStackZ@users.noreply.github.com>

source/utils/extract.cpp

@@ -1,6 +1,6 @@
 /*
 *   This file is part of Universal-Updater
-*   Copyright (C) 2019-2020 Universal-Team
+*   Copyright (C) 2019-2021 Universal-Team
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
@@ -25,6 +25,7 @@
 */
 
 #include "extract.hpp"
+#include "queueSystem.hpp"
 #include "scriptUtils.hpp"
 #include <archive.h>
 #include <archive_entry.h>
@@ -33,7 +34,7 @@
 int filesExtracted = 0, extractFilesCount = 0;
 std::string extractingFile = "";
 
-/* That are our File Progressbar variable. */
+/* That are our Extract Progressbar variable. */
 u32 extractSize = 0, writeOffset = 0;
 
 Result getExtractedSize(const std::string &archivePath, const std::string &wantedFile) {
@@ -48,7 +49,7 @@ Result getExtractedSize(const std::string &archivePath, const std::string &wante
 
 	while(archive_read_next_header(a, &entry) == ARCHIVE_OK) {
 		int size = archive_entry_size(entry);
-		if (size > 0) { /* Ignore folders. */
+		if (size > 0) { // Ignore folders.
 			std::smatch match;
 			std::string entryName(archive_entry_pathname(entry));
 			if (std::regex_search(entryName, match, std::regex(wantedFile))) {
@@ -77,11 +78,12 @@ Result extractArchive(const std::string &archivePath, const std::string &wantedF
 	}
 
 	while(archive_read_next_header(a, &entry) == ARCHIVE_OK) {
-		if (archive_entry_size(entry) > 0) { /* Ignore folders. */
+		if (archive_entry_size(entry) > 0) { // Ignore folders.
 			std::smatch match;
 			std::string entryName(archive_entry_pathname(entry));
 			if (std::regex_search(entryName, match, std::regex(wantedFile))) {
 				extractingFile = outputPath + match.suffix().str();
+				filesExtracted++;
 
 				/* make directories. */
 				for (char *slashpos = strchr(extractingFile.c_str() + 1, '/'); slashpos != NULL; slashpos = strchr(slashpos + 1, '/')) {
@@ -113,27 +115,31 @@ Result extractArchive(const std::string &archivePath, const std::string &wantedF
 				while(sizeLeft > 0) {
 					u64 toRead = std::min(0x30000u, sizeLeft);
 					ssize_t size = archive_read_data(a, buf, toRead);
-					// Archive error, stop extracting
-					if(size < 0) {
+
+					/* Archive error, stop extracting. */
+					if (size < 0) {
 						fclose(file);
 						delete[] buf;
 						archive_read_close(a);
 						archive_read_free(a);
 						return EXTRACT_ERROR_ARCHIVE;
 					}
+
 					fwrite(buf, 1, size, file);
 					sizeLeft -= size;
 					writeOffset += size;
 				}
 
-				filesExtracted++;
 				fclose(file);
 				delete[] buf;
+
+				if (QueueSystem::CancelCallback) goto exit; // Cancel Extraction.
 			}
 		}
 	}
 
-	archive_read_close(a);
-	archive_read_free(a);
-	return EXTRACT_ERROR_NONE;
+	exit:
+		archive_read_close(a);
+		archive_read_free(a);
+		return EXTRACT_ERROR_NONE;
 }