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import type { AniListAuthorisation } from './identity';
import type { MediaListEntryStatus, MediaSeason, MediaStatus, MediaTitle } from './media';
export interface MediaPrequel {
id: number;
title: MediaTitle;
episodes: number;
seen: number;
nextAiringEpisode?: {
episode: number;
airingAt?: number;
};
startDate: {
year: number;
month: number;
day: number;
};
coverImage: {
extraLarge: string;
medium: string;
};
}
export interface PrequelRelationNode {
id: number;
title: MediaTitle;
episodes: number;
status: MediaStatus;
mediaListEntry: {
status: MediaListEntryStatus;
progress: number;
};
coverImage: {
extraLarge: string;
medium: string;
};
startDate: {
year: number;
};
}
export interface PrequelRelation {
relationType: string;
node: PrequelRelationNode;
}
export interface PrequelRelations {
edges: PrequelRelation[];
}
interface PrequelsPage {
data: {
Page: {
media: {
title: MediaTitle;
id: number;
relations: PrequelRelations;
nextAiringEpisode?: {
episode: number;
airingAt?: number;
};
startDate: {
year: number;
month: number;
day: number;
};
coverImage: {
extraLarge: string;
medium: string;
};
}[];
pageInfo: {
hasNextPage: boolean;
};
};
};
}
const prequelsPage = async (
page: number,
anilistAuthorisation: AniListAuthorisation,
year: number,
season: MediaSeason
): Promise<PrequelsPage> =>
await (
await fetch('https://graphql.anilist.co', {
method: 'POST',
headers: {
Authorization: `${anilistAuthorisation.tokenType} ${anilistAuthorisation.accessToken}`,
'Content-Type': 'application/json',
Accept: 'application/json'
},
body: JSON.stringify({
query: `{
Page(page: ${page}) {
pageInfo {
hasNextPage
}
media(season: ${season}, seasonYear: ${year}) {
title {
english
romaji
}
coverImage { extraLarge medium }
id
nextAiringEpisode { episode airingAt }
startDate { year month day }
relations {
edges {
relationType
node {
title {
english
romaji
}
episodes
mediaListEntry {
status
progress
}
coverImage { extraLarge medium }
}
}
}
}
}
}`
})
})
).json();
export const prequels = async (
anilistAuthorisation: AniListAuthorisation,
year: number,
season: 'WINTER' | 'SPRING' | 'SUMMER' | 'FALL'
): Promise<MediaPrequel[]> => {
const candidates = [];
let page = 1;
let currentPage = await prequelsPage(page, anilistAuthorisation, year, season);
for (const candidate of currentPage.data.Page.media) candidates.push(candidate);
while (currentPage['data']['Page']['pageInfo']['hasNextPage']) {
for (const candidate of currentPage.data.Page.media) candidates.push(candidate);
page += 1;
currentPage = await prequelsPage(page, anilistAuthorisation, year, season);
}
for (const candidate of currentPage.data.Page.media) candidates.push(candidate);
const media: MediaPrequel[] = [];
for (const candidate of candidates) {
let episodes = 0;
let seen = 0;
for (const relation of candidate.relations.edges) {
if (relation.relationType === 'PREQUEL' || relation.relationType === 'PARENT') {
if (
relation.node.mediaListEntry === null ||
relation.node.mediaListEntry.status !== 'COMPLETED'
) {
episodes += relation.node.episodes;
if (relation.node.mediaListEntry !== null)
seen += relation.node.mediaListEntry.progress || 0;
}
}
}
if (media.some((m) => m.id === candidate.id)) continue;
if (episodes !== 0)
media.push({
id: candidate.id,
title: candidate.title,
episodes,
seen,
nextAiringEpisode: candidate.nextAiringEpisode,
startDate: candidate.startDate,
coverImage: candidate.coverImage
});
}
return media;
};
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