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|
import deepEql from "deep-equal";
import { and, eq } from "drizzle-orm";
import { bookmarks, tagsOnBookmarks } from "@karakeep/db/schema";
import { LinkCrawlerQueue } from "@karakeep/shared-server";
import {
RuleEngineAction,
RuleEngineCondition,
RuleEngineEvent,
RuleEngineRule,
} from "@karakeep/shared/types/rules";
import { AuthedContext } from "..";
import { List } from "../models/lists";
import { RuleEngineRuleModel } from "../models/rules";
async function fetchBookmark(db: AuthedContext["db"], bookmarkId: string) {
return await db.query.bookmarks.findFirst({
where: eq(bookmarks.id, bookmarkId),
with: {
link: {
columns: {
url: true,
},
},
text: true,
asset: true,
tagsOnBookmarks: true,
rssFeeds: {
columns: {
rssFeedId: true,
},
},
user: {
columns: {},
with: {
rules: {
with: {
actions: true,
},
},
},
},
},
});
}
type ReturnedBookmark = NonNullable<Awaited<ReturnType<typeof fetchBookmark>>>;
export interface RuleEngineEvaluationResult {
type: "success" | "failure";
ruleId: string;
message: string;
}
export class RuleEngine {
private constructor(
private ctx: AuthedContext,
private bookmark: Omit<ReturnedBookmark, "user">,
private rules: RuleEngineRule[],
) {}
static async forBookmark(ctx: AuthedContext, bookmarkId: string) {
const [bookmark, rules] = await Promise.all([
fetchBookmark(ctx.db, bookmarkId),
RuleEngineRuleModel.getAll(ctx),
]);
if (!bookmark) {
throw new Error(`Bookmark ${bookmarkId} not found`);
}
return new RuleEngine(
ctx,
bookmark,
rules.map((r) => r.rule),
);
}
doesBookmarkMatchConditions(condition: RuleEngineCondition): boolean {
switch (condition.type) {
case "alwaysTrue": {
return true;
}
case "urlContains": {
return (this.bookmark.link?.url ?? "").includes(condition.str);
}
case "importedFromFeed": {
return this.bookmark.rssFeeds.some(
(f) => f.rssFeedId === condition.feedId,
);
}
case "bookmarkTypeIs": {
return this.bookmark.type === condition.bookmarkType;
}
case "hasTag": {
return this.bookmark.tagsOnBookmarks.some(
(t) => t.tagId === condition.tagId,
);
}
case "isFavourited": {
return this.bookmark.favourited;
}
case "isArchived": {
return this.bookmark.archived;
}
case "and": {
return condition.conditions.every((c) =>
this.doesBookmarkMatchConditions(c),
);
}
case "or": {
return condition.conditions.some((c) =>
this.doesBookmarkMatchConditions(c),
);
}
default: {
const _exhaustiveCheck: never = condition;
return false;
}
}
}
async evaluateRule(
rule: RuleEngineRule,
event: RuleEngineEvent,
): Promise<RuleEngineEvaluationResult[]> {
if (!rule.enabled) {
return [];
}
if (!deepEql(rule.event, event, { strict: true })) {
return [];
}
if (!this.doesBookmarkMatchConditions(rule.condition)) {
return [];
}
const results = await Promise.allSettled(
rule.actions.map((action) => this.executeAction(action)),
);
return results.map((result) => {
if (result.status === "fulfilled") {
return {
type: "success",
ruleId: rule.id,
message: result.value,
};
} else {
return {
type: "failure",
ruleId: rule.id,
message: (result.reason as Error).message,
};
}
});
}
async executeAction(action: RuleEngineAction): Promise<string> {
switch (action.type) {
case "addTag": {
await this.ctx.db
.insert(tagsOnBookmarks)
.values([
{
attachedBy: "human",
bookmarkId: this.bookmark.id,
tagId: action.tagId,
},
])
.onConflictDoNothing();
return `Added tag ${action.tagId}`;
}
case "removeTag": {
await this.ctx.db
.delete(tagsOnBookmarks)
.where(
and(
eq(tagsOnBookmarks.tagId, action.tagId),
eq(tagsOnBookmarks.bookmarkId, this.bookmark.id),
),
);
return `Removed tag ${action.tagId}`;
}
case "addToList": {
const list = await List.fromId(this.ctx, action.listId);
await list.addBookmark(this.bookmark.id);
return `Added to list ${action.listId}`;
}
case "removeFromList": {
const list = await List.fromId(this.ctx, action.listId);
await list.removeBookmark(this.bookmark.id);
return `Removed from list ${action.listId}`;
}
case "downloadFullPageArchive": {
await LinkCrawlerQueue.enqueue(
{
bookmarkId: this.bookmark.id,
archiveFullPage: true,
runInference: false,
},
{
groupId: this.bookmark.userId,
},
);
return `Enqueued full page archive`;
}
case "favouriteBookmark": {
await this.ctx.db
.update(bookmarks)
.set({
favourited: true,
})
.where(eq(bookmarks.id, this.bookmark.id));
return `Marked as favourited`;
}
case "archiveBookmark": {
await this.ctx.db
.update(bookmarks)
.set({
archived: true,
})
.where(eq(bookmarks.id, this.bookmark.id));
return `Marked as archived`;
}
default: {
const _exhaustiveCheck: never = action;
return "";
}
}
}
async onEvent(event: RuleEngineEvent): Promise<RuleEngineEvaluationResult[]> {
const results = await Promise.all(
this.rules.map((rule) => this.evaluateRule(rule, event)),
);
return results.flat();
}
}
|
