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index.ts
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import petitio from "petitio";
import { components } from "@octokit/openapi-types";
import { LinearWebhookPayload } from "../../typings";
import { createHmac, timingSafeEqual } from "crypto";
import { IssueCommentCreatedEvent, IssuesEvent } from "@octokit/webhooks-types";
import { LinearClient } from "@linear/sdk";
import prisma from "../../prisma";
import { NextApiRequest, NextApiResponse } from "next";
import {
decrypt,
formatJSON,
getAttachmentQuery,
legacySyncFooter,
getSyncFooter,
skipReason
} from "../../utils";
import { getGitHubFooter } from "../../utils/github";
import { generateLinearUUID, inviteMember } from "../../utils/linear";
import { GITHUB, LINEAR } from "../../utils/constants";
import { getIssueUpdateError, getOtherUpdateError } from "../../utils/errors";
import { replaceMentions, upsertUser } from "./utils";
import { linearQuery } from "../../utils/apollo";
export default async (req: NextApiRequest, res: NextApiResponse) => {
if (req.method !== "POST")
return res.status(405).send({
success: false,
message: "Only POST requests are accepted."
});
else if (
LINEAR.IP_ORIGINS.includes(req.socket.remoteAddress || "") &&
!req.headers["x-hub-signature-256"]
)
return res.status(403).send({
success: false,
message: "Request not from Linear or GitHub."
});
/**
* Linear webhook consumer
*/
if (req.headers["user-agent"] === "Linear-Webhook") {
const {
action,
updatedFrom,
data,
url,
type: actionType
}: LinearWebhookPayload = req.body;
const syncs = await prisma.sync.findMany({
where: {
linearUserId: data.userId ?? data.creatorId
},
include: {
LinearTeam: true,
GitHubRepo: true
}
});
if (
syncs.length === 0 ||
!syncs.find(
sync => sync.linearUserId === (data.userId ?? data.creatorId)
)
) {
console.log("Could not find Linear user in syncs.");
return res.status(200).send({
success: true,
message: "Could not find Linear user in syncs."
});
}
const sync = syncs.find(
sync => sync.linearUserId === (data.userId ?? data.creatorId)
);
if (!sync?.LinearTeam || !sync?.GitHubRepo) {
console.log("Could not find ticket's corresponding repo.");
return res.status(404).send({
success: false,
message: "Could not find ticket's corresponding repo."
});
}
const {
linearUserId,
linearApiKey,
linearApiKeyIV,
githubApiKey,
githubUserId,
githubApiKeyIV,
LinearTeam: { publicLabelId, doneStateId, canceledStateId },
GitHubRepo: { repoName: repoFullName, repoId }
} = sync;
const linearKey = process.env.LINEAR_API_KEY
? process.env.LINEAR_API_KEY
: decrypt(linearApiKey, linearApiKeyIV);
const linear = new LinearClient({
apiKey: linearKey
});
const ticketName = `${data.team?.key ?? ""}-${data.number}`;
const githubKey = process.env.GITHUB_API_KEY
? process.env.GITHUB_API_KEY
: decrypt(githubApiKey, githubApiKeyIV);
const githubAuthHeader = `token ${githubKey}`;
const userAgentHeader = `${repoFullName}, linear-github-sync`;
const issuesEndpoint = `https://api.github.com/repos/${repoFullName}/issues`;
// Map the user's Linear username to their GitHub username if not yet mapped
await upsertUser(
linear,
githubUserId,
linearUserId,
userAgentHeader,
githubAuthHeader
);
const syncedIssue = await prisma.syncedIssue.findFirst({
where: {
linearIssueId: data.id,
linearTeamId: data.teamId
},
include: { GitHubRepo: true }
});
if (action === "update") {
// Label updated on an already-Public issue
if (updatedFrom.labelIds?.includes(publicLabelId)) {
if (!syncedIssue) {
console.log(skipReason("label", ticketName));
return res.status(200).send({
success: true,
message: skipReason("label", ticketName)
});
}
if (data.labelIds.length < updatedFrom.labelIds.length) {
const removedLabelId = updatedFrom.labelIds.find(
id => !data.labelIds.includes(id)
);
if (removedLabelId === publicLabelId) {
await prisma.syncedIssue.delete({
where: { id: syncedIssue.id }
});
console.log(
"Deleted synced issue after Public label removed."
);
return res.status(200).send({
success: true,
message: `Deleted synced issue ${ticketName} after Public label removed.`
});
}
const label = await linear.issueLabel(removedLabelId);
if (!label) {
return res.status(403).send({
success: false,
message: "Could not find label."
});
}
const removedLabelResponse = await petitio(
`${GITHUB.REPO_ENDPOINT}/${syncedIssue.GitHubRepo.repoName}/issues/${syncedIssue.githubIssueNumber}/labels/${label.name}`,
"DELETE"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.send();
if (removedLabelResponse.statusCode > 201) {
console.log(`Could not remove label "${label.name}".`);
return res.status(403).send({
success: false,
message: `Could not remove label "${label.name}".`
});
} else {
console.log(
`Removed label "${label.name}" from issue #${syncedIssue.githubIssueNumber}.`
);
}
} else if (data.labelIds.length > updatedFrom.labelIds.length) {
const addedLabelId = data.labelIds.find(
id => !updatedFrom.labelIds.includes(id)
);
const label = await linear.issueLabel(addedLabelId);
if (!label) {
return res.status(403).send({
success: false,
message: "Could not find label."
});
}
const createdLabelResponse = await petitio(
`https://api.github.com/repos/${repoFullName}/labels`,
"POST"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({
name: label.name,
color: label.color.replace("#", ""),
description: "Created by Linear-GitHub Sync"
})
.send();
const createdLabelData = await createdLabelResponse.json();
if (
createdLabelResponse.statusCode > 201 &&
createdLabelData.errors?.[0]?.code !== "already_exists"
) {
console.log("Could not create label.");
return res.status(403).send({
success: false,
message: "Could not create label."
});
}
const labelName =
createdLabelData.errors?.[0]?.code === "already_exists"
? label.name
: createdLabelData.name;
const appliedLabelResponse = await petitio(
`${GITHUB.REPO_ENDPOINT}/${syncedIssue.GitHubRepo.repoName}/issues/${syncedIssue.githubIssueNumber}/labels`,
"POST"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({ labels: [labelName] })
.send();
if (appliedLabelResponse.statusCode > 201) {
console.log("Could not apply label.");
return res.status(403).send({
success: false,
message: "Could not apply label."
});
} else {
console.log(
`Applied label "${labelName}" to issue #${syncedIssue.githubIssueNumber}.`
);
}
}
} else if (
updatedFrom.labelIds &&
!updatedFrom.labelIds?.includes(publicLabelId) &&
data.labelIds?.includes(publicLabelId)
) {
// Public label added to an issue
if (syncedIssue) {
console.log(
`Not creating issue after label added as issue ${ticketName} [${data.id}] already exists on GitHub as issue #${syncedIssue.githubIssueNumber} [${syncedIssue.githubIssueId}].`
);
return res.status(200).send({
success: true,
message: "Issue already exists on GitHub."
});
}
const modifiedDescription = await replaceMentions(
data.description,
"linear"
);
const assignee = await prisma.user.findFirst({
where: { linearUserId: data.assigneeId },
select: { githubUsername: true }
});
const createdIssueResponse = await petitio(
issuesEndpoint,
"POST"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({
title: `[${ticketName}] ${data.title}`,
body: `${
modifiedDescription ?? ""
}${getSyncFooter()} | [${ticketName}](${url})`,
assignees: [
data.assigneeId && assignee?.githubUsername
? assignee?.githubUsername
: ""
]
})
.send();
if (
!syncs.some(
sync =>
sync.linearUserId ===
(data.userId ?? data.creatorId)
)
) {
inviteMember(
data.creatorId,
data.teamId,
repoFullName,
linear
);
}
if (createdIssueResponse.statusCode > 201) {
console.log(
`Failed to create GitHub issue for ${data.team.key}-${
data.number
}, received status code ${
createdIssueResponse.statusCode
}, body of ${formatJSON(
await createdIssueResponse.json()
)}.`
);
return res.status(500).send({
success: false,
message: `I was unable to create an issue on Github. Status code: ${createdIssueResponse.statusCode}`
});
}
let createdIssueData: components["schemas"]["issue"] =
await createdIssueResponse.json();
const linearIssue = await linear.issue(data.id);
const attachmentQuery = getAttachmentQuery(
data.id,
createdIssueData.number,
repoFullName
);
await Promise.all([
linearQuery(attachmentQuery, linearKey).then(response => {
if (!response?.data?.attachmentCreate?.success) {
console.log(
`Failed to create attachment on ${ticketName} for GitHub issue #${
createdIssueData.number
}, received response ${
response?.error ?? response?.data ?? ""
}.`
);
} else {
console.log(
`Created attachment on ${ticketName} for GitHub issue #${createdIssueData.number}.`
);
}
}),
prisma.syncedIssue.create({
data: {
githubIssueId: createdIssueData.id,
linearIssueId: data.id,
linearTeamId: data.teamId,
githubIssueNumber: createdIssueData.number,
linearIssueNumber: data.number,
githubRepoId: repoId
}
})
] as Promise<any>[]);
// Sync all comments on the issue
const linearComments = await linearIssue
.comments()
.then(comments =>
Promise.all(
comments.nodes.map(comment =>
comment.user?.then(user => ({
comment,
user
}))
)
)
);
for (const linearComment of linearComments) {
if (!linearComment) continue;
const { comment, user } = linearComment;
const modifiedComment = await replaceMentions(
comment.body,
"linear"
);
await petitio(
`${issuesEndpoint}/${createdIssueData.number}/comments`,
"POST"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({
body: `${modifiedComment ?? ""}${getGitHubFooter(
user.displayName
)}`
})
.send()
.then(commentResponse => {
if (commentResponse.statusCode > 201)
console.log(
getOtherUpdateError(
"comment",
data,
createdIssueData,
createdIssueResponse,
commentResponse.json()
)
);
else
console.log(
`Created comment on GitHub issue #${createdIssueData.number} [${createdIssueData.id}] for Linear issue ${ticketName}.`
);
});
}
}
// Title change
if (updatedFrom.title && actionType === "Issue") {
if (!syncedIssue) {
console.log(skipReason("edit", ticketName));
return res.status(200).send({
success: true,
message: skipReason("edit", ticketName)
});
}
await petitio(
`${GITHUB.REPO_ENDPOINT}/${syncedIssue.GitHubRepo.repoName}/issues/${syncedIssue.githubIssueNumber}`,
"PATCH"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({
title: `[${ticketName}] ${data.title}`
})
.send()
.then(updatedIssueResponse => {
if (updatedIssueResponse.statusCode > 201)
console.log(
getIssueUpdateError(
"title",
data,
syncedIssue,
updatedIssueResponse
)
);
else
console.log(
`Updated GitHub issue title for ${ticketName} [${data.id}] on GitHub issue #${syncedIssue.githubIssueNumber} [${syncedIssue.githubIssueId}].`
);
});
}
// Description change
if (updatedFrom.description && actionType === "Issue") {
if (!syncedIssue) {
console.log(skipReason("edit", ticketName));
return res.status(200).send({
success: true,
message: skipReason("edit", ticketName)
});
}
if (
data.description?.includes(getSyncFooter()) ||
data.description?.includes(legacySyncFooter)
) {
console.log(skipReason("edit", ticketName, true));
return res.status(200).send({
success: true,
message: skipReason("edit", ticketName, true)
});
}
const modifiedDescription = await replaceMentions(
data.description,
"linear"
);
await petitio(
`${GITHUB.REPO_ENDPOINT}/${syncedIssue.GitHubRepo.repoName}/issues/${syncedIssue.githubIssueNumber}`,
"PATCH"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({
body: `${modifiedDescription ?? ""}${getSyncFooter()}`
})
.send()
.then(updatedIssueResponse => {
if (updatedIssueResponse.statusCode > 201)
console.log(
getIssueUpdateError(
"description",
data,
syncedIssue,
updatedIssueResponse
)
);
else
console.log(
`Updated GitHub issue description for ${ticketName} [${data.id}] on GitHub issue #${syncedIssue.githubIssueNumber} [${syncedIssue.githubIssueId}].`
);
});
}
// State change (eg. "Open" to "Done")
if (updatedFrom.stateId) {
if (!syncedIssue) {
console.log(skipReason("state change", ticketName));
return res.status(200).send({
success: true,
message: skipReason("state change", ticketName)
});
}
await petitio(
`${GITHUB.REPO_ENDPOINT}/${syncedIssue.GitHubRepo.repoName}/issues/${syncedIssue.githubIssueNumber}`,
"PATCH"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({
state: [doneStateId, canceledStateId].includes(
data.stateId
)
? "closed"
: "open",
state_reason:
doneStateId === data.stateId
? "completed"
: "not_planned"
})
.send()
.then(updatedIssueResponse => {
if (updatedIssueResponse.statusCode > 201)
console.log(
getIssueUpdateError(
"state",
data,
syncedIssue,
updatedIssueResponse
)
);
else
console.log(
`Updated GitHub issue state for ${ticketName} [${data.id}] on GitHub issue #${syncedIssue.githubIssueNumber} [${syncedIssue.githubIssueId}].`
);
});
}
// Assignee change
if ("assigneeId" in updatedFrom) {
if (!syncedIssue) {
const reason = skipReason("assignee", ticketName);
console.log(reason);
return res.status(200).send({
success: true,
message: reason
});
}
const assigneeEndpoint = `${GITHUB.REPO_ENDPOINT}/${syncedIssue.GitHubRepo.repoName}/issues/${syncedIssue.githubIssueNumber}/assignees`;
// Assignee removed
if (updatedFrom.assigneeId !== null) {
const prevAssignee = await prisma.user.findFirst({
where: {
linearUserId: updatedFrom.assigneeId
},
select: {
githubUsername: true
}
});
if (prevAssignee) {
const response = await petitio(
assigneeEndpoint,
"DELETE"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({ assignees: [prevAssignee.githubUsername] })
.send();
if (response.statusCode > 201) {
console.log(
getIssueUpdateError(
"assignee",
data,
syncedIssue,
response
)
);
} else {
console.log(
`Removed assignee on GitHub issue #${syncedIssue.githubIssueNumber} for ${ticketName}.`
);
}
} else {
console.log(
`Skipping assignee removal for ${ticketName} as no GitHub username was found for Linear user ${data.assigneeId}.`
);
}
}
// Assignee added
if (data.assigneeId) {
const assignee = await prisma.user.findFirst({
where: {
linearUserId: data.assigneeId
},
select: {
githubUsername: true
}
});
if (assignee) {
const response = await petitio(assigneeEndpoint, "POST")
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({ assignees: [assignee.githubUsername] })
.send();
if (response.statusCode > 201) {
console.log(
getIssueUpdateError(
"assignee",
data,
syncedIssue,
response
)
);
} else {
console.log(
`Updated assignee on GitHub issue #${syncedIssue.githubIssueNumber} for ${ticketName}.`
);
}
} else {
`Skipping assignee for ${ticketName} as no GitHub username was found for Linear user ${data.assigneeId}.`;
}
}
}
} else if (action === "create") {
if (actionType === "Comment") {
// Comment added
if (data.id.includes(GITHUB.UUID_SUFFIX)) {
console.log(skipReason("comment", data.issue!.id, true));
return res.status(200).send({
success: true,
message: skipReason("comment", data.issue!.id, true)
});
}
// Overrides the outer-scope syncedIssue because comments do not come with teamId
const syncedIssue = await prisma.syncedIssue.findFirst({
where: {
linearIssueId: data.issueId
},
include: { GitHubRepo: true }
});
if (!syncedIssue) {
console.log(
skipReason(
"comment",
`${data.team?.key}-${data.number}`
)
);
return res.status(200).send({
success: true,
message: skipReason(
"comment",
`${data.team?.key}-${data.number}`
)
});
}
const modifiedBody = await replaceMentions(data.body, "linear");
await petitio(
`${GITHUB.REPO_ENDPOINT}/${syncedIssue.GitHubRepo.repoName}/issues/${syncedIssue.githubIssueNumber}/comments`,
"POST"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({
body: `${modifiedBody ?? ""}${getGitHubFooter(
data.user?.name
)}`
})
.send()
.then(commentResponse => {
if (commentResponse.statusCode > 201)
console.log(
`Failed to update GitHub issue state for ${
data.issue?.id
} on GitHub issue #${
syncedIssue.githubIssueNumber
} [${
syncedIssue.githubIssueId
}], received status code ${
commentResponse.statusCode
}, body of ${formatJSON(
commentResponse.json()
)}.`
);
else
console.log(
`Synced comment [${data.id}] for ${data.issue?.id} on GitHub issue #${syncedIssue.githubIssueNumber} [${syncedIssue.githubIssueId}].`
);
});
} else if (actionType === "Issue") {
// Issue created
if (!data.labelIds?.includes(publicLabelId)) {
const reason = "Issue is not labeled as public";
console.log(reason);
return res.status(200).send({
success: true,
message: reason
});
}
if (
data.description?.includes(getSyncFooter()) ||
data.description?.includes(legacySyncFooter)
) {
const reason = skipReason("issue", data.id, true);
console.log(reason);
return res.status(200).send({
success: true,
message: reason
});
}
if (syncedIssue) {
const reason = `Not creating issue after label added as issue ${ticketName} already exists on GitHub as #${syncedIssue.githubIssueNumber}.`;
console.log(reason);
return res.status(200).send({
success: true,
message: reason
});
}
const modifiedDescription = await replaceMentions(
data.description,
"linear"
);
const assignee = await prisma.user.findFirst({
where: { linearUserId: data.assigneeId },
select: { githubUsername: true }
});
const createdIssueResponse = await petitio(
issuesEndpoint,
"POST"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({
title: `[${ticketName}] ${data.title}`,
body: `${
modifiedDescription ?? ""
}${getSyncFooter()} | [${ticketName}](${url})`,
assignees: [
data.assigneeId && assignee?.githubUsername
? assignee?.githubUsername
: ""
]
})
.send();
if (createdIssueResponse.statusCode > 201) {
console.log(
`Failed to create GitHub issue for ${data.team.key}-${
data.number
}, received status code ${
createdIssueResponse.statusCode
}, body of ${formatJSON(createdIssueResponse.json())}.`
);
return res.status(500).send({
success: false,
message: `I was unable to create an issue on Github. Status code: ${createdIssueResponse.statusCode}`
});
}
const createdIssueData: components["schemas"]["issue"] =
await createdIssueResponse.json();
const attachmentQuery = getAttachmentQuery(
data.id,
createdIssueData.number,
repoFullName
);
await Promise.all([
linearQuery(attachmentQuery, linearKey).then(response => {
if (!response?.data?.attachmentCreate?.success) {
console.log(
`Failed to create attachment on ${ticketName} for GitHub issue #${
createdIssueData.number
}, received response ${
response?.error ?? response?.data ?? ""
}.`
);
} else {
console.log(
`Created attachment on ${ticketName} for GitHub issue #${createdIssueData.number}.`
);
}
}),
prisma.syncedIssue.create({
data: {
githubIssueId: createdIssueData.id,
linearIssueId: data.id,
linearTeamId: data.teamId,
githubIssueNumber: createdIssueData.number,
linearIssueNumber: data.number,
githubRepoId: repoId
}
})
] as Promise<any>[]);
// Apply all labels to newly-created issue
const labelIds = data.labelIds.filter(
id => id != publicLabelId
);
const labelNames: string[] = [];
for (const labelId of labelIds) {
if (labelId === publicLabelId) continue;
const label = await linear.issueLabel(labelId);
if (!label) {
console.log(
`Could not find label ${labelId} for ${ticketName}.`
);
continue;
}
const createdLabelResponse = await petitio(
`https://api.github.com/repos/${repoFullName}/labels`,
"POST"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({
name: label.name,
color: label.color?.replace("#", ""),
description: "Created by Linear-GitHub Sync"
})
.send();
const createdLabelData = await createdLabelResponse.json();
if (
createdLabelResponse.statusCode > 201 &&
createdLabelData.errors?.[0]?.code !== "already_exists"
) {
console.log(
`Could not create GH label "${label.name}" in ${repoFullName}.`
);
continue;
}
const labelName =
createdLabelData.errors?.[0]?.code === "already_exists"
? label.name
: createdLabelData.name;
labelNames.push(labelName);
}
const appliedLabelResponse = await petitio(
`${issuesEndpoint}/${createdIssueData.number}/labels`,
"POST"
)
.header("User-Agent", userAgentHeader)
.header("Authorization", githubAuthHeader)
.body({ labels: labelNames })
.send();
if (appliedLabelResponse.statusCode > 201) {
console.log(
`Could not apply labels to #${createdIssueData.number} in ${repoFullName}.`
);
} else {
console.log(
`Applied labels to #${createdIssueData.number} in ${repoFullName}.`
);
}
if (!syncs.some(sync => sync.linearUserId === data.creatorId)) {
await inviteMember(
data.creatorId,
data.teamId,
repoFullName,
linear
);
}
}
}
if (actionType === "Project") {
console.log("Project event received.");
}
/**
* GitHub webhook consumer
*/
} else {
const { repository, sender, action } = req.body;
const sync = await prisma.sync.findFirst({
where: {
githubRepoId: repository.id,
githubUserId: sender.id
},
include: {
GitHubRepo: true,
LinearTeam: true
}
});
if (!sync?.LinearTeam || !sync?.GitHubRepo) {
console.log("Could not find issue's corresponding team.");
return res.status(404).send({
success: false,
message: "Could not find issue's corresponding team."
});
}
const HMAC = createHmac("sha256", sync.GitHubRepo?.webhookSecret ?? "");
const digest = Buffer.from(
`sha256=${HMAC.update(JSON.stringify(req.body)).digest("hex")}`,
"utf-8"
);
const sig = Buffer.from(
req.headers["x-hub-signature-256"] as string,
"utf-8"
);
if (sig.length !== digest.length || !timingSafeEqual(digest, sig)) {
console.log("Failed to verify signature for webhook.");
return res.status(403).send({
success: false,
message: "GitHub webhook secret doesn't match up."
});
}
const {
linearUserId,
linearApiKey,
linearApiKeyIV,
githubUserId,
githubApiKey,
githubApiKeyIV,
LinearTeam: {
publicLabelId,
doneStateId,
toDoStateId,
canceledStateId,
teamId: linearTeamId
},
GitHubRepo: { repoName }
} = sync;
const linearKey = process.env.LINEAR_API_KEY
? process.env.LINEAR_API_KEY
: decrypt(linearApiKey, linearApiKeyIV);
const linear = new LinearClient({
apiKey: linearKey
});
const githubKey = process.env.GITHUB_API_KEY
? process.env.GITHUB_API_KEY