Revamped backend error handling & improved imports in tests

11 files changed, 125 insertions, 101 deletions

diff --git a/packages/server/src/git/blob.ts b/packages/server/src/git/blob.ts
index 5d1d892..ad88ca5 100644
--- a/packages/server/src/git/blob.ts
+++ b/packages/server/src/git/blob.ts
@@ -1,4 +1,4 @@
-import { BlobError, createError } from "./error";
+import { createError, ErrorWhere, IsNotError } from "./error";
 import { Tree } from "./tree";
 import { BlobTreeEntry } from "./tree_entry";
 
@@ -37,7 +37,7 @@ export class Blob {
 		const entry = await tree.find(path);
 
 		if(!(entry instanceof BlobTreeEntry)) {
-			throw(createError(BlobError, 500, "Not a blob"));
+			throw(createError(ErrorWhere.Blob, IsNotError, "tree entry", "a blob"));
 		}
 
 		return new Blob(entry);
diff --git a/packages/server/src/git/branch.ts b/packages/server/src/git/branch.ts
index 1dbb690..dacabda 100644
--- a/packages/server/src/git/branch.ts
+++ b/packages/server/src/git/branch.ts
@@ -2,7 +2,7 @@ import { CommitSummary } from "./commit";
 import { Reference } from "./reference";
 import { Repository } from "./repository";
 import { Repository as NodeGitRepository } from "nodegit";
-import { BranchError, createError } from "./error";
+import { createError, ErrorWhere, FailedError, NotFoundError, UnknownError } from "./error";
 
 /**
  * A representation of a branch
@@ -17,7 +17,7 @@ export class Branch extends Reference {
 	 */
 	public async latestCommit(): Promise<CommitSummary> {
 		const latest_commit = this._owner.ng_repository.getBranchCommit(this._ng_reference).catch(() => {
-			throw(createError(BranchError, 500, "Failed to get the latest commit"));
+			throw(createError(ErrorWhere.Branch, FailedError, "get the latest commit"));
 		});
 
 		return {
@@ -37,9 +37,9 @@ export class Branch extends Reference {
 	public static async lookup(owner: Repository, branch: string): Promise<Branch> {
 		const reference = await owner.ng_repository.getBranch(branch).catch(err => {
 			if(err.errno === -3) {
-				throw(createError(BranchError, 404, "Branch not found!"));
+				throw(createError(ErrorWhere.Branch, NotFoundError, "branch"));
 			}
-			throw(createError(BranchError, 500, "Something went wrong."));
+			throw(createError(ErrorWhere.Branch, UnknownError));
 		});
 		return new Branch(owner, reference);
 	}
diff --git a/packages/server/src/git/commit.ts b/packages/server/src/git/commit.ts
index 32b5869..d5d8eab 100644
--- a/packages/server/src/git/commit.ts
+++ b/packages/server/src/git/commit.ts
@@ -7,7 +7,7 @@ import { createMessage, readKey, readSignature, verify } from "openpgp";
 import { promisify } from "util";
 import { exec } from "child_process";
 import { findAsync } from "./misc";
-import { CommitError, createError } from "./error";
+import { ErrorWhere, createError, CommitNotSignedError, FailedError } from "./error";
 
 const pExec = promisify(exec);
 
@@ -46,7 +46,7 @@ export class CommitAuthor implements Author {
 	 */
 	public async fingerprint(): Promise<string> {
 		const basic_signature = await this._ng_commit.getSignature().catch(() => {
-			throw(createError(CommitError, 500, "Commit isn't signed!"));
+			throw(createError(ErrorWhere.Commit, CommitNotSignedError));
 		});
 
 		const message = await createMessage({ text: basic_signature.signedData });
@@ -54,7 +54,7 @@ export class CommitAuthor implements Author {
 		const pub_keys_list = await pExec("gpg --list-public-keys");
 
 		if(pub_keys_list.stderr) {
-			throw(createError(CommitError, 500, "Failed to get public keys from gpg!"));
+			throw(createError(ErrorWhere.Commit, FailedError, "get public keys from gpg!"));
 		}
 
 		const pub_keys = pub_keys_list.stdout
@@ -79,7 +79,7 @@ export class CommitAuthor implements Author {
 			const key_export = await pExec(`gpg --armor --export ${fingerprint}`);
 
 			if(key_export.stderr) {
-				throw(createError(CommitError, 500, "Failed to export a public key from gpg!"));
+				throw(createError(ErrorWhere.Commit, FailedError, "export a public key from gpg!"));
 			}
 
 			const signature = await readSignature({ armoredSignature: basic_signature.signature });
@@ -97,7 +97,7 @@ export class CommitAuthor implements Author {
 		});
 
 		if(!pub_key) {
-			throw(createError(CommitError, 500, "Failed to find a public key matching the commit signature!"));
+			throw(createError(ErrorWhere.Commit, FailedError, "find a public key matching the commit signature!"));
 		}
 
 		return pub_key
diff --git a/packages/server/src/git/diff.ts b/packages/server/src/git/diff.ts
index 3d69183..d084e5d 100644
--- a/packages/server/src/git/diff.ts
+++ b/packages/server/src/git/diff.ts
@@ -1,5 +1,5 @@
 import { Diff as NodeGitDiff } from "nodegit";
-import { createError, DiffError } from "./error";
+import { createError, ErrorWhere, NotFoundError } from "./error";
 import { Patch } from "./patch";
 
 type PatchHeaderData = {
@@ -75,7 +75,7 @@ export class Diff {
 		const patch = (await this.ng_diff.patches())[index];
 
 		if(!patch) {
-			throw(createError(DiffError, 500, "Patch not found"));
+			throw(createError(ErrorWhere.Diff, NotFoundError, "Patch"));
 		}
 
 		return new Patch(this, (await this.ng_diff.patches())[index], index);
diff --git a/packages/server/src/git/error.ts b/packages/server/src/git/error.ts
deleted file mode 100644
index b89b994..0000000
--- a/packages/server/src/git/error.ts
+++ /dev/null
@@ -1,75 +0,0 @@
-export abstract class BaseError implements Error {
-	code: number;
-	name: string;
-	message: string;
-	stack?: string | undefined;
-
-	constructor(code: number, message: string) {
-		this.name = "Githermit Error";
-
-		this.code = code;
-		this.message = message;
-	}
-}
-
-export class RepositoryError extends BaseError {
-	constructor(code: number, message: string) {
-		super(code, "A repository error has occured: " + message);
-	}
-}
-
-export class BranchError extends BaseError {
-	constructor(code: number, message: string) {
-		super(code, "A branch error has occured: " + message);
-	}
-}
-
-export class TagError extends BaseError {
-	constructor(code: number, message: string) {
-		super(code, "A tag error has occured: " + message);
-	}
-}
-
-export class TreeError extends BaseError {
-	constructor(code: number, message: string) {
-		super(code, "A tree error has occured: " + message);
-	}
-}
-
-export class BlobError extends BaseError {
-	constructor(code: number, message: string) {
-		super(code, "A blob error has occured: " + message);
-	}
-}
-
-export class MiscError extends BaseError {
-	constructor(code: number, message: string) {
-		super(code, "A misc error has occured: " + message);
-	}
-}
-
-export class DiffError extends BaseError {
-	constructor(code: number, message: string) {
-		super(code, "A diff error has occured: " + message);
-	}
-}
-
-export class CommitError extends BaseError {
-	constructor(code: number, message: string) {
-		super(code, "A commit error has occured: " + message);
-	}
-}
-
-type ErrorConstructorType<T> = new (code: number, message: string) => T;
-
-/**
- * An error factory
- *
- * @param ErrorConstructor - The constructor for what error to create
- * @param code - A HTTP code
- * @param message - A error message
- * @returns An instance of a error
- */
-export function createError<E extends BaseError>(ErrorConstructor: ErrorConstructorType<E>, code: number, message: string): E {
-	return new ErrorConstructor(code, message);
-}
\ No newline at end of file
diff --git a/packages/server/src/git/error/index.ts b/packages/server/src/git/error/index.ts
new file mode 100644
index 0000000..b8994d3
--- /dev/null
+++ b/packages/server/src/git/error/index.ts
@@ -0,0 +1,60 @@
+import { ErrorType } from "./types";
+
+export * from "./types";
+
+export class ServerError extends Error {
+	code: number;
+
+	constructor(where: string, error_type: { code: number, message: string }) {
+		super(`A ${where} error has occured: ${error_type.message}`);
+
+		this.name = "Server Error";
+		this.code = error_type.code;
+	}
+}
+
+export enum ErrorWhere {
+	Repository = "repository",
+	Tree = "tree",
+	Tag = "tag",
+	Branch = "branch",
+	Commit = "commit",
+	Diff = "diff",
+	Misc = "misc",
+	Blob = "blob"
+}
+
+/**
+ * A error factory
+ *
+ * @param where - Where the error has occured
+ * @param err_type - What type of error it is
+ * @param args - Parameters for the error type
+ *
+ * @returns A server error
+ *
+ * @example Example usage:
+ * import { ErrorType, NotFoundError, createError } from "./error";
+ *
+ * throw(createError(ErrorType.Repository, NotFoundError, "chili sauce"));
+ */
+export function createError<T extends new (...args: string[]) => ErrorType>(where: ErrorWhere, ErrType: T, ...args: ConstructorParameters<T>): ServerError;
+
+/**
+ * A error factory
+ *
+ * @param where - Where the error has occured
+ * @param err_type - What type of error it is
+ *
+ * @returns A server error
+ *
+ * @example Example usage:
+ * import { ErrorType, UnknownError, createError } from "./error";
+ *
+ * throw(createError(ErrorType.Repository, UnknownError));
+ */
+export function createError<T extends new () => ErrorType>(where: ErrorWhere, ErrType: T): ServerError;
+
+export function createError<T extends new(...args: string[]) => ErrorType>(where: ErrorWhere, ErrType: T, ...args: ConstructorParameters<T>): ServerError {
+	return new ServerError(where, new ErrType(...args));
+}
\ No newline at end of file
diff --git a/packages/server/src/git/error/types.ts b/packages/server/src/git/error/types.ts
new file mode 100644
index 0000000..b8f2de7
--- /dev/null
+++ b/packages/server/src/git/error/types.ts
@@ -0,0 +1,39 @@
+export abstract class ErrorType {
+	code: number;
+	message: string;
+
+	constructor(code: number, message: string) {
+		this.code = code;
+		this.message = message;
+	}
+}
+
+export class UnknownError extends ErrorType {
+	constructor() {
+		super(500, "Unknown error!");
+	}
+}
+
+export class NotFoundError extends ErrorType {
+	constructor(target: string) {
+		super(404, `${target} not found!`);
+	}
+}
+
+export class FailedError extends ErrorType {
+	constructor(attempt: string) {
+		super(500, `Failed to ${attempt}!`);
+	}
+}
+
+export class IsNotError extends ErrorType {
+	constructor(target: string, not: string) {
+		super(500, `${target} is not a ${not}!`);
+	}
+}
+
+export class CommitNotSignedError extends ErrorType {
+	constructor() {
+		super(500, "Commit isn't signed!");
+	}
+}
\ No newline at end of file
diff --git a/packages/server/src/git/misc.ts b/packages/server/src/git/misc.ts
index 1fda304..43c7a70 100644
--- a/packages/server/src/git/misc.ts
+++ b/packages/server/src/git/misc.ts
@@ -1,5 +1,5 @@
 import { readFile, readdir } from "fs";
-import { createError, MiscError } from "./error";
+import { createError, ErrorWhere, FailedError } from "./error";
 
 /**
  * Asynchronously find an item in an array that matches the requirements set by the callback
@@ -25,7 +25,7 @@ export function getFile(git_dir: string, repository: string, file: string): Prom
 	return new Promise((resolve, reject) => {
 		readFile(`${git_dir}/${repository}/${file}`, (err, content) => {
 			if(err) {
-				reject(createError(MiscError, 500, "Failed to open repository file " + file));
+				reject(createError(ErrorWhere.Misc, FailedError, `open repository file '${file}'`));
 				return;
 			}
 
@@ -44,7 +44,7 @@ export function getDirectory(directory: string): Promise<string[]> {
 	return new Promise<string[]>((resolve, reject) => {
 		readdir(directory, (err, dir_content) => {
 			if(err) {
-				reject(createError(MiscError, 500, "Failed to open directory " + directory));
+				reject(createError(ErrorWhere.Misc, FailedError, `open directory '${directory}'`));
 				return;
 			}
 
diff --git a/packages/server/src/git/repository.ts b/packages/server/src/git/repository.ts
index 63ede23..9e83281 100644
--- a/packages/server/src/git/repository.ts
+++ b/packages/server/src/git/repository.ts
@@ -7,7 +7,7 @@ import { Commit } from "./commit";
 import { FastifyReply } from "fastify";
 import { Tag } from "./tag";
 import { Tree } from "./tree";
-import { createError, RepositoryError } from "./error";
+import { createError, ErrorWhere, NotFoundError, UnknownError } from "./error";
 
 /**
  * Returns the full name of a git repository
@@ -162,15 +162,15 @@ export class Repository {
 	public static async open(git_dir: string, repository: string, branch?: string): Promise<Repository> {
 		let ng_repository = await NodeGitRepository.openBare(`${git_dir}/${getFullRepositoryName(repository)}`).catch((err: WeirdError) => {
 			if(err.errno === -3) {
-				throw(createError(RepositoryError, 404, "Repository not found"));
+				throw(createError(ErrorWhere.Repository, NotFoundError, "repository"));
 			}
 
-			throw(createError(RepositoryError, 500, "Unknown error"));
+			throw(createError(ErrorWhere.Repository, UnknownError));
 		});
 
 		if(branch) {
 			if(!await Branch.lookupExists(ng_repository, branch)) {
-				throw(createError(RepositoryError, 404, "Branch not found!"));
+				throw(createError(ErrorWhere.Repository, NotFoundError, "branch"));
 			}
 		}
 
diff --git a/packages/server/src/git/tag.ts b/packages/server/src/git/tag.ts
index b792516..6c61a65 100644
--- a/packages/server/src/git/tag.ts
+++ b/packages/server/src/git/tag.ts
@@ -5,7 +5,7 @@ import { Reference } from "./reference";
 import { Repository } from "./repository";
 import { createGzip } from "zlib";
 import { pipeline } from "stream";
-import { createError, TagError } from "./error";
+import { createError, ErrorWhere, FailedError, NotFoundError } from "./error";
 import { Author } from "../../../api/src";
 import { promisify } from "util";
 
@@ -88,10 +88,10 @@ export class Tag extends Reference {
 	public static async lookup(owner: Repository, tag: string): Promise<Tag> {
 		const reference = await owner.ng_repository.getReference(tag).catch(err => {
 			if(err.errno === -3) {
-				throw(createError(TagError, 404, "Tag not found"));
+				throw(createError(ErrorWhere.Tag, NotFoundError, "Tag"));
 			}
 
-			throw(createError(TagError, 404, "Failed to get tag"));
+			throw(createError(ErrorWhere.Tag, FailedError, "get tag"));
 		});
 
 		return new Tag(owner, reference);
diff --git a/packages/server/src/git/tree.ts b/packages/server/src/git/tree.ts
index 7936e5d..4b6d329 100644
--- a/packages/server/src/git/tree.ts
+++ b/packages/server/src/git/tree.ts
@@ -1,7 +1,7 @@
 import { Tree as NodeGitTree } from "nodegit";
 import { Repository } from "./repository";
 import { BaseTreeEntry, BlobTreeEntry, createTreeEntry, TreeEntry } from "./tree_entry";
-import { createError, TreeError } from "./error";
+import { createError, ErrorWhere, FailedError, NotFoundError } from "./error";
 import { pack, Pack } from "tar-stream";
 import { Commit } from "./commit";
 
@@ -42,9 +42,9 @@ export class Tree {
 	public async find(path: string): Promise<BaseTreeEntry> {
 		const entry = await this._ng_tree.getEntry(path).catch(err => {
 			if(err.errno === -3) {
-				throw(createError(TreeError, 404, `Path '${path}' not found`));
+				throw(createError(ErrorWhere.Tree, NotFoundError, `Path '${path}'`));
 			}
-			throw(createError(TreeError, 500, "Failed to get tree path"));
+			throw(createError(ErrorWhere.Tree, FailedError, "get tree path"));
 		});
 
 		return createTreeEntry(this._owner, entry);