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131 lines
4.1 KiB
Solidity

//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "hardhat/console.sol";
import "./IFileOperator.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "evm-large-storage/contracts/examples/FlatDirectory.sol";
// import "evm-large-storage/contracts/W3RC3.sol";
contract Git3 {
IFileOperator public immutable storageManager;
struct refInfo {
bytes20 hash;
uint96 index;
}
struct refData {
bytes20 hash;
string name;
}
mapping(bytes => address) public repoNameToOwner;
mapping(string => refInfo) public nameToRefInfo; // dev => {hash: 0x1234..., index: 1 }
string[] public refs; // [main, dev, test, staging]
function _convertRefInfo(
refInfo memory info
) internal view returns (refData memory res) {
res.hash = info.hash;
res.name = refs[info.index];
}
constructor() {
storageManager = IFileOperator(address(new FlatDirectory(220)));
}
modifier onlyOwner(bytes memory repoName, address memory user) {
require(repoNameToOwner[repoName] == user || repoNameToOwner[repoName] == address(0));
_;
}
function download(
bytes memory repoName,
bytes memory path
) external view returns (bytes memory, bool) {
// call flat directory(FD)
return storageManager.read(bytes.concat(repoName, '/', path));
}
function upload(bytes memory repoName, bytes memory path, bytes memory data)
external payable onlyOwner(repoName, msg.sender)
{
storageManager.writeChunk{value: msg.value}(bytes.concat(repoName, '/', path), 0, data);
}
function uploadChunk(
bytes memory repoName,
bytes memory path,
uint256 chunkId,
bytes memory data
) external payable onlyOwner(repoName, msg.sender) {
storageManager.writeChunk{value: msg.value}(bytes.concat(repoName, '/', path), chunkId, data);
}
function remove(bytes memory repoName, bytes memory path) external onlyOwner(repoName, msg.sender) {
// The actually process of remove will remove all the chunks
storageManager.remove(bytes.concat(repoName, '/', path));
}
function size(bytes memory name) external view returns (uint256, uint256) {
return storageManager.size(name);
}
function countChunks(bytes memory name) external view returns (uint256) {
return storageManager.countChunks(name);
}
function listRefs() public view returns (refData[] memory list) {
list = new refData[](refs.length);
for (uint index = 0; index < refs.length; index++) {
list[index] = _convertRefInfo(nameToRefInfo[refs[index]]);
}
}
function setRef(bytes memory repoName, bytes memory name, bytes20 refHash) public onlyOwner(repoName, msg.sender) {
// only execute `sload` once to reduce gas consumption
refInfo memory srs;
srs = nameToRefInfo[name];
uint256 refsLen = refs.length;
if (srs.hash == bytes20(0)) {
// store refHash for the first time
require(
refsLen <= uint256(uint96(int96(-1))),
"Refs exceed valid length"
);
repoToOwner
nameToRefInfo[name].hash = refHash;
nameToRefInfo[name].index = uint96(refsLen);
refs.push(name);
} else {
// only update refHash
nameToRefInfo[name].hash = refHash;
}
}
function delRef(bytes memory repoName, bytes memory name) public onlyOwner(repoName, msg.sender) {
// only execute `sload` once to reduce gas consumption
refInfo memory srs;
srs = nameToRefInfo[name];
uint256 refsLen = refs.length;
require(
srs.hash != bytes20(0),
"Reference of this name does not exist"
);
require(srs.index < refsLen, "System Error: Invalid index");
if (srs.index < refsLen - 1) {
refs[srs.index] = refs[refsLen - 1];
nameToRefInfo[refs[refsLen - 1]].index = srs.index;
}
refs.pop();
delete nameToRefInfo[name];
}
}