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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242import { error } from "@sveltejs/kit";import type { Did } from "@atcute/lexicons/syntax";import type { GitRepoInfo } from "#lib/components/repo/types.ts";import { createBobbinClient } from "#lib/api/client.ts";import { branches as listBranches, gitTarget, type GitServiceConfig } from "#lib/api/gitclient.ts";import { getMergeBase, listCommits, toMirrorCommitSummary } from "#lib/api/knotmirror.ts";import { listRepos } from "#lib/api/records.ts";import { resolveRepoKnot, branchSummaries, type BranchSummary, type CommitSummary} from "#lib/api/repo.ts";import { didFromUri } from "#lib/api/uri.ts";import type { Fetch } from "#lib/fetch.ts";
export type PullSource = "patch" | "branch" | "fork";
const SOURCES: PullSource[] = ["patch", "branch", "fork"];
export const parseSource = (raw: string | null | undefined): PullSource | null => { const value = raw?.toLowerCase() as PullSource | undefined; return value && SOURCES.includes(value) ? value : null;};
const branchTime = (branch: BranchSummary): number => (branch.when ? Date.parse(branch.when) : NaN);
/** newest commit first; branches with no commit sort last, order otherwise kept */export const sortBranchesByRecency = (branches: readonly BranchSummary[]): BranchSummary[] => branches .map((branch, index) => ({ branch, index, time: branchTime(branch) })) .sort((a, b) => { const aMissing = Number.isNaN(a.time); const bMissing = Number.isNaN(b.time); if (aMissing || bMissing) return aMissing === bMissing ? a.index - b.index : aMissing ? 1 : -1; return b.time - a.time || a.index - b.index; }) .map((entry) => entry.branch);
/** you can't open a PR from the default branch, so it never appears as a source */export const sourceBranchChoices = (branches: readonly BranchSummary[]): BranchSummary[] => sortBranchesByRecency(branches.filter((branch) => !branch.isDefault));
const named = (branches: readonly BranchSummary[], name: string): boolean => branches.some((branch) => branch.name === name);
export const defaultTargetBranch = ( branches: readonly BranchSummary[], current: string): string => { if (current && named(branches, current)) return current; return branches.find((branch) => branch.isDefault)?.name ?? "";};
export const defaultSourceBranch = ( source: PullSource, current: string, branchChoices: readonly BranchSummary[], forkBranches: readonly BranchSummary[]): string => { if (source === "patch") return current; const candidates = source === "fork" ? forkBranches : branchChoices; if (current && named(candidates, current)) return current; return candidates[0]?.name ?? "";};
export interface ComposeSelection { source: PullSource; sourceBranch: string; targetBranch: string; /** repo did of the chosen fork */ fork: string;}
export const composeQuery = (selection: ComposeSelection): string => { const query = new URLSearchParams(); if (selection.source !== "branch") query.set("source", selection.source); if (selection.sourceBranch) query.set("sourceBranch", selection.sourceBranch); if (selection.targetBranch) query.set("targetBranch", selection.targetBranch); if (selection.source === "fork" && selection.fork) query.set("fork", selection.fork); return query.toString();};
const BRANCH_LIMIT = 100;const COMMIT_LIMIT = 100;
// one of the viewer's forks, as the fork picker needs itexport interface ForkOption { uri: string; repoDid: string; owner: string; name: string; knot: string;}
export interface ComposeData { commits: CommitSummary[]; commitsError: string; mergeBase: string; sourceHead: string; // `owner/repo` of the source repo, for the browse-at-commit links sourceRepoPath: string; branches: BranchSummary[]; sourceBranches: BranchSummary[]; forkBranches: BranchSummary[]; forks: ForkOption[]; source: PullSource; sourceBranch: string; targetBranch: string; fork: string; patch: string; sourceRepoDid: string; sourceKnot: string; showDetails: boolean; prefillError: string;}
// the route load calls this for the active account, the component calls it// again client-side when the pick diverges since only the fork lane depends// on the identityexport const loadCompose = async (args: { config: GitServiceConfig; repo: GitRepoInfo | Promise<GitRepoInfo>; viewer: { did: string; handle: string } | null; params: URLSearchParams; fetch: Fetch;}): Promise<ComposeData> => { const { config, repo: repoInput, viewer, params, fetch: fetchFn } = args; const repo = await repoInput; const repoDid = repo.repoDid; if (!repoDid) throw error(404, "This repository has not been indexed yet"); const ctx = createBobbinClient({ serviceUrl: config.bobbinUrl, fetch: fetchFn }); const source: PullSource = parseSource(params.get("source")) ?? "branch";
const [branchList, forkList] = await Promise.all([ listBranches(gitTarget(config, repo, fetchFn), BRANCH_LIMIT) .then(branchSummaries) .catch(() => [] as BranchSummary[]), viewer ? listRepos(ctx, viewer.did, { limit: 100 }) .then((page) => Promise.all( page.items .filter((item) => { const source = item.value.source; return !!source && "did" in source && source.did === repoDid; }) .map(async (item): Promise<ForkOption> => ({ uri: item.uri, repoDid: didFromUri(item.uri), owner: viewer.handle, name: item.value.declaration.name, knot: (await resolveRepoKnot(ctx, didFromUri(item.uri))) ?? "" })) ) ) .catch(() => [] as ForkOption[]) : Promise.resolve([] as ForkOption[]) ]);
let fork = params.get("fork") ?? ""; if (source === "fork" && !fork && forkList.length === 1) fork = forkList[0].repoDid; const forkRepo = forkList.find((entry) => entry.repoDid === fork);
let prefillError = ""; let forkBranches: BranchSummary[] = []; if (source === "fork" && forkRepo) { try { const page = await listBranches( gitTarget(config, { uri: forkRepo.uri, repoDid: forkRepo.repoDid }, fetchFn), BRANCH_LIMIT ); forkBranches = sortBranchesByRecency(branchSummaries(page)); } catch (cause) { prefillError = cause instanceof Error ? cause.message : String(cause); } }
const sourceBranches = sourceBranchChoices(branchList); const targetBranch = defaultTargetBranch(branchList, params.get("targetBranch") ?? ""); const sourceBranch = defaultSourceBranch( source, params.get("sourceBranch") ?? "", sourceBranches, forkBranches );
const sourceRepoDid = fork || repoDid; const hasComparison = Boolean(sourceRepoDid && sourceBranch && targetBranch); const targetHead = branchList.find((branch) => branch.name === targetBranch)?.hash ?? ""; const sourceHead = (source === "fork" ? forkBranches : sourceBranches).find( (branch) => branch.name === sourceBranch )?.hash ?? ""; const repos = sourceRepoDid === repoDid ? [repoDid] : [sourceRepoDid, repoDid];
let commits: CommitSummary[] = []; let commitsError = ""; let mergeBase = ""; if (hasComparison && source !== "patch" && targetHead && sourceHead) { try { const [page, base] = await Promise.all([ listCommits(ctx, { repos: repos as Did[], ranges: [`${targetHead}..${sourceHead}`], limit: COMMIT_LIMIT, includeStats: true }), getMergeBase(ctx, { repos, base: targetHead, head: sourceHead }) ]); commits = page.commits.map(toMirrorCommitSummary); mergeBase = base.commit; } catch (cause) { commitsError = cause instanceof Error ? cause.message : String(cause); } }
return { commits, commitsError, mergeBase, sourceHead, sourceRepoPath: forkRepo ? `${forkRepo.owner}/${forkRepo.name}` : `${repo.ownerHandle}/${repo.name}`, branches: branchList, sourceBranches, forkBranches, forks: forkList, source, sourceBranch, targetBranch, fork, patch: params.get("patch") ?? "", sourceRepoDid, sourceKnot: forkRepo?.knot ?? repo.knot, showDetails: hasComparison, prefillError };};