mirror of
https://github.com/abraunegg/onedrive
synced 2024-05-05 15:33:16 +02:00
546 lines
14 KiB
D
546 lines
14 KiB
D
import std.exception: ErrnoException;
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import std.algorithm, std.datetime, std.file, std.json, std.path, std.regex;
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import std.stdio, std.string;
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import config, itemdb, onedrive, util;
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private bool isItemFolder(const ref JSONValue item)
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{
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scope (failure) return false;
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JSONValue folder = item["folder"];
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return true;
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}
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private bool isItemFile(const ref JSONValue item)
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{
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scope (failure) return false;
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JSONValue folder = item["file"];
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return true;
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}
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private bool isItemDeleted(const ref JSONValue item)
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{
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scope (failure) return false;
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return !item["deleted"].isNull();
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}
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private bool testCrc32(string path, const(char)[] crc32)
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{
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if (crc32) {
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string localCrc32 = computeCrc32(path);
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if (crc32 == localCrc32) return true;
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}
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return false;
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}
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class SyncException: Exception
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{
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@nogc @safe pure nothrow this(string msg, string file = __FILE__, size_t line = __LINE__, Throwable next = null)
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{
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super(msg, file, line, next);
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}
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@nogc @safe pure nothrow this(string msg, Throwable next, string file = __FILE__, size_t line = __LINE__)
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{
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super(msg, file, line, next);
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}
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}
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final class SyncEngine
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{
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private Config cfg;
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private OneDriveApi onedrive;
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private ItemDatabase itemdb;
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private bool verbose;
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private Regex!char skipDir, skipFile;
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// token representing the last status correctly synced
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private string statusToken;
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// list of items to skip while applying the changes downloaded
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private string[] skippedItems;
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// list of items to delete after the changes has been downloaded
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private string[] pathsToDelete;
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void delegate(string) onStatusToken;
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this(Config cfg, OneDriveApi onedrive, ItemDatabase itemdb, bool verbose)
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{
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assert(onedrive && itemdb);
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this.cfg = cfg;
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this.onedrive = onedrive;
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this.itemdb = itemdb;
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this.verbose = verbose;
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skipDir = wild2regex(cfg.get("skip_dir"));
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skipFile = wild2regex(cfg.get("skip_file"));
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}
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void setStatusToken(string statusToken)
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{
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this.statusToken = statusToken;
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}
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void applyDifferences()
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{
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if (verbose) writeln("Applying differences ...");
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try {
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JSONValue changes;
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do {
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changes = onedrive.viewChangesByPath("/", statusToken);
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foreach (item; changes["value"].array) {
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applyDifference(item);
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}
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statusToken = changes["@changes.token"].str;
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onStatusToken(statusToken);
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} while (changes["@changes.hasMoreChanges"].type == JSON_TYPE.TRUE);
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} catch (ErrnoException e) {
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throw new SyncException(e.msg, e);
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} catch (FileException e) {
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throw new SyncException(e.msg, e);
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} catch (OneDriveException e) {
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throw new SyncException(e.msg, e);
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}
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// delete items in pathsToDelete
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if (pathsToDelete.length > 0) deleteItems();
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// empty the skipped items
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skippedItems.length = 0;
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assumeSafeAppend(skippedItems);
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}
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private void applyDifference(JSONValue item)
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{
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string id = item["id"].str;
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string name = item["name"].str;
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string parentId = item["parentReference"]["id"].str;
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// HACK: recognize the root directory
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if (name == "root" && parentId[$ - 1] == '0' && parentId[$ - 2] == '!') {
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parentId = null;
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}
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// skip unwanted items early
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if (skippedItems.find(parentId).length != 0) {
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skippedItems ~= id;
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return;
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}
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if (verbose) writeln(id, " ", name);
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// check if the cached item is still synced
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Item oldItem;
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string oldPath;
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bool cached = itemdb.selectById(id, oldItem);
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if (cached) {
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oldPath = itemdb.computePath(id);
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if (!isItemSynced(oldItem, oldPath)) {
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if (verbose) writeln("The local item is out of sync, renaming");
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if (exists(oldPath)) safeRename(oldPath);
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cached = false;
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}
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}
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// compute the path of the item
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string path;
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if (parentId) {
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path = itemdb.computePath(parentId) ~ "/" ~ name;
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} else {
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path = ".";
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}
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ItemType type;
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if (isItemDeleted(item)) {
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if (verbose) writeln("The item is marked for deletion");
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if (cached) {
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itemdb.deleteById(id);
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pathsToDelete ~= oldPath;
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}
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return;
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} else if (isItemFile(item)) {
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type = ItemType.file;
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if (!path.matchFirst(skipFile).empty) {
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if (verbose) writeln("Filtered out");
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return;
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}
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} else if (isItemFolder(item)) {
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type = ItemType.dir;
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if (!path.matchFirst(skipDir).empty) {
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if (verbose) writeln("Filtered out");
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skippedItems ~= id;
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return;
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}
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} else {
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if (verbose) writeln("The item is neither a file nor a directory, skipping");
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skippedItems ~= id;
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return;
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}
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string eTag = item["eTag"].str;
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string cTag = item["cTag"].str;
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string mtime = item["fileSystemInfo"]["lastModifiedDateTime"].str;
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string crc32;
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if (type == ItemType.file) {
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try {
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crc32 = item["file"]["hashes"]["crc32Hash"].str;
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} catch (JSONException e) {
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if (verbose) writeln("The hash is not available");
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}
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}
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Item newItem = {
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id: id,
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name: name,
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type: type,
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eTag: eTag,
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cTag: cTag,
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mtime: SysTime.fromISOExtString(mtime),
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parentId: parentId,
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crc32: crc32
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};
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if (!cached) {
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applyNewItem(newItem, path);
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} else {
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applyChangedItem(oldItem, newItem, path);
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}
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// save the item in the db
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if (oldItem.id) {
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itemdb.update(id, name, type, eTag, cTag, mtime, parentId, crc32);
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} else {
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itemdb.insert(id, name, type, eTag, cTag, mtime, parentId, crc32);
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}
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}
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private void applyNewItem(Item item, string path)
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{
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if (exists(path)) {
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if (isItemSynced(item, path)) {
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if (verbose) writeln("The item is already present");
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// ensure the modified time is correct
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setTimes(path, item.mtime, item.mtime);
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return;
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} else {
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if (verbose) writeln("The local item is out of sync, renaming ...");
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safeRename(path);
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}
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}
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final switch (item.type) {
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case ItemType.file:
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writeln("Downloading: ", path);
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onedrive.downloadById(item.id, path);
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break;
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case ItemType.dir:
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writeln("Creating directory: ", path);
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mkdir(path);
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break;
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}
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setTimes(path, item.mtime, item.mtime);
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}
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private void applyChangedItem(Item oldItem, Item newItem, string newPath)
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{
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assert(oldItem.id == newItem.id);
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assert(oldItem.type == newItem.type);
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if (oldItem.eTag != newItem.eTag) {
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string oldPath = itemdb.computePath(oldItem.id);
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if (oldPath != newPath) {
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writeln("Moving: ", oldPath, " -> ", newPath);
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if (exists(newPath)) {
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if (verbose) writeln("The destination is occupied, renaming ...");
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safeRename(newPath);
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}
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rename(oldPath, newPath);
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}
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if (newItem.type == ItemType.file && oldItem.cTag != newItem.cTag) {
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writeln("Downloading: ", newPath);
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onedrive.downloadById(newItem.id, newPath);
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}
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setTimes(newPath, newItem.mtime, newItem.mtime);
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} else {
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if (verbose) writeln("The item has not changed");
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}
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}
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// returns true if the given item corresponds to the local one
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private bool isItemSynced(Item item, string path)
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{
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if (!exists(path)) return false;
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final switch (item.type) {
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case ItemType.file:
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if (isFile(path)) {
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SysTime localModifiedTime = timeLastModified(path);
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import core.time: Duration;
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item.mtime.fracSecs = Duration.zero; // HACK
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if (localModifiedTime == item.mtime) {
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return true;
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} else {
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if (verbose) writeln("The local item has a different modified time ", localModifiedTime, " remote is ", item.mtime);
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}
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if (testCrc32(path, item.crc32)) {
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return true;
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} else {
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if (verbose) writeln("The local item has a different hash");
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}
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} else {
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if (verbose) writeln("The local item is a directory but should be a file");
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}
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break;
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case ItemType.dir:
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if (isDir(path)) {
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return true;
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} else {
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if (verbose) writeln("The local item is a file but should be a directory");
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}
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break;
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}
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return false;
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}
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private void deleteItems()
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{
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if (verbose) writeln("Deleting files ...");
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foreach_reverse (path; pathsToDelete) {
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if (exists(path)) {
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if (isFile(path)) {
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remove(path);
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writeln("Deleted file: ", path);
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}
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} else {
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try {
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rmdir(path);
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writeln("Deleted dir: ", path);
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} catch (FileException e) {
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writeln("Keeping dir: ", path);
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}
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}
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}
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pathsToDelete.length = 0;
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assumeSafeAppend(pathsToDelete);
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}
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// scan the given directory for differences
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public void scanForDifferences(string path)
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{
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try {
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if (verbose) writeln("Uploading differences ...");
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Item item;
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if (itemdb.selectByPath(path, item)) {
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uploadDifferences(item);
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}
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if (verbose) writeln("Uploading new items ...");
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uploadNewItems(path);
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} catch (ErrnoException e) {
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throw new SyncException(e.msg, e);
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} catch (FileException e) {
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throw new SyncException(e.msg, e);
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} catch (OneDriveException e) {
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throw new SyncException(e.msg, e);
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}
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}
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private void uploadDifferences(Item item)
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{
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if (verbose) writeln(item.id, " ", item.name);
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string path = itemdb.computePath(item.id);
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final switch (item.type) {
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case ItemType.dir:
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if (!path.matchFirst(skipDir).empty) {
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if (verbose) writeln("Filtered out");
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break;
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}
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uploadDirDifferences(item, path);
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break;
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case ItemType.file:
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if (!path.matchFirst(skipFile).empty) {
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if (verbose) writeln("Filtered out");
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break;
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}
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uploadFileDifferences(item, path);
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break;
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}
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}
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private void uploadDirDifferences(Item item, string path)
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{
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assert(item.type == ItemType.dir);
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if (exists(path)) {
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if (!isDir(path)) {
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if (verbose) writeln("The item was a directory but now is a file");
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uploadDeleteItem(item, path);
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uploadNewFile(path);
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} else {
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if (verbose) writeln("The directory has not changed");
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// loop trough the children
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foreach (Item child; itemdb.selectChildren(item.id)) {
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uploadDifferences(child);
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}
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}
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} else {
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if (verbose) writeln("The directory has been deleted");
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uploadDeleteItem(item, path);
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}
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}
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private void uploadFileDifferences(Item item, string path)
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{
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assert(item.type == ItemType.file);
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if (exists(path)) {
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if (isFile(path)) {
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SysTime localModifiedTime = timeLastModified(path);
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import core.time: Duration;
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item.mtime.fracSecs = Duration.zero; // HACK
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if (localModifiedTime != item.mtime) {
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if (verbose) writeln("The file last modified time has changed");
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string id = item.id;
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string eTag = item.eTag;
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if (!testCrc32(path, item.crc32)) {
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if (verbose) writeln("The file content has changed");
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writeln("Uploading: ", path);
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auto res = onedrive.simpleUpload(path, path, item.eTag);
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saveItem(res);
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id = res["id"].str;
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/* use the cTag instead of the eTag because Onedrive changes the
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* metadata of some type of files (ex. images) AFTER they have been
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* uploaded */
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eTag = res["cTag"].str;
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}
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uploadLastModifiedTime(id, eTag, localModifiedTime.toUTC());
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} else {
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if (verbose) writeln("The file has not changed");
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}
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} else {
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if (verbose) writeln("The item was a file but now is a directory");
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uploadDeleteItem(item, path);
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uploadCreateDir(path);
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}
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} else {
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if (verbose) writeln("The file has been deleted");
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uploadDeleteItem(item, path);
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}
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}
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private void uploadNewItems(string path)
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{
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if (isDir(path)) {
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if (path.matchFirst(skipDir).empty) {
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Item item;
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if (!itemdb.selectByPath(path, item)) {
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uploadCreateDir(path);
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}
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auto entries = dirEntries(path, SpanMode.shallow, false);
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foreach (DirEntry entry; entries) {
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uploadNewItems(entry.name);
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}
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}
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} else {
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if (path.matchFirst(skipFile).empty) {
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Item item;
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if (!itemdb.selectByPath(path, item)) {
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uploadNewFile(path);
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}
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}
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}
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}
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private void uploadCreateDir(const(char)[] path)
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{
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writeln("Creating remote directory: ", path);
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JSONValue item = ["name": baseName(path).idup];
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item["folder"] = parseJSON("{}");
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auto res = onedrive.createByPath(path.dirName ~ "/", item);
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saveItem(res);
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}
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private void uploadNewFile(string path)
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{
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writeln("Uploading: ", path);
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JSONValue res = onedrive.simpleUpload(path, path);
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saveItem(res);
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string id = res["id"].str;
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string cTag = res["cTag"].str;
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SysTime mtime = timeLastModified(path).toUTC();
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/* use the cTag instead of the eTag because Onedrive changes the
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* metadata of some type of files (ex. images) AFTER they have been
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* uploaded */
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uploadLastModifiedTime(id, cTag, mtime);
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}
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private void uploadDeleteItem(Item item, const(char)[] path)
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{
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writeln("Deleting remote item: ", path);
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onedrive.deleteById(item.id, item.eTag);
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itemdb.deleteById(item.id);
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}
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private void uploadLastModifiedTime(const(char)[] id, const(char)[] eTag, SysTime mtime)
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{
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JSONValue mtimeJson = [
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"fileSystemInfo": JSONValue([
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"lastModifiedDateTime": mtime.toISOExtString()
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])
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];
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auto res = onedrive.updateById(id, mtimeJson, eTag);
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saveItem(res);
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}
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private void saveItem(JSONValue item)
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{
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string id = item["id"].str;
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ItemType type;
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if (isItemFile(item)) {
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type = ItemType.file;
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} else if (isItemFolder(item)) {
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type = ItemType.dir;
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} else {
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assert(0);
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}
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string name = item["name"].str;
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string eTag = item["eTag"].str;
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string cTag = item["cTag"].str;
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string mtime = item["fileSystemInfo"]["lastModifiedDateTime"].str;
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string parentId = item["parentReference"]["id"].str;
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string crc32;
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if (type == ItemType.file) {
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try {
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crc32 = item["file"]["hashes"]["crc32Hash"].str;
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} catch (JSONException e) {
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// swallow exception
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}
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}
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itemdb.upsert(id, name, type, eTag, cTag, mtime, parentId, crc32);
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}
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void uploadMoveItem(string from, string to)
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{
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writeln("Moving remote item: ", from, " -> ", to);
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Item fromItem, toItem, parentItem;
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if (!itemdb.selectByPath(from, fromItem)) {
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throw new SyncException("Can't move an unsynced item");
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}
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if (itemdb.selectByPath(to, toItem)) {
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// the destination has been overridden
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uploadDeleteItem(toItem, to);
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}
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if (!itemdb.selectByPath(to.dirName, parentItem)) {
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throw new SyncException("Can't move an item to an unsynced directory");
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}
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JSONValue diff = ["name": baseName(to)];
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diff["parentReference"] = JSONValue([
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"id": parentItem.id
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]);
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auto res = onedrive.updateById(fromItem.id, diff, fromItem.eTag);
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saveItem(res);
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string id = res["id"].str;
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string eTag = res["eTag"].str;
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uploadLastModifiedTime(id, eTag, timeLastModified(to).toUTC());
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}
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void deleteByPath(const(char)[] path)
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{
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Item item;
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if (!itemdb.selectByPath(path, item)) {
|
|
throw new SyncException("Can't delete an unsynced item");
|
|
}
|
|
uploadDeleteItem(item, path);
|
|
}
|
|
}
|