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server.js
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server.js
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"use strict";
require("dotenv").load();
const ENV = process.env.ENV || "development";
const PORT = process.env.PORT || 3000;
const express = require("express");
const app = express();
const bodyParser = require("body-parser");
const wikipedia = require("./lib/wikipedia");
const traverson = require("traverson"),
JsonHalAdapter = require("traverson-hal"),
xappToken = process.env.ARTSY_TOLKEN;
const api_path = "https://api.artsy.net/api";
traverson.registerMediaType(JsonHalAdapter.mediaType, JsonHalAdapter);
const api = traverson.from(api_path).jsonHal();
// For debugging
function logStep(label) {
return function logIt(data) {
return data;
};
}
// Promise.map polyfill
Promise.map = (arr, callback) => Promise.all(arr.map(callback));
function artsyAPI(endpoint, params) {
return new Promise((resolve, reject) => {
api
.newRequest()
.follow(endpoint)
.withRequestOptions({
headers: {
"X-Xapp-Token": xappToken,
Accept: "application/vnd.artsy-v2+json"
}
})
.withTemplateParameters(params)
.getResource((error, results) => {
if (error) {
reject(error);
} else {
resolve(results);
}
});
});
}
// Function for initial search
function search(searchQuery) {
return artsyAPI("search", { q: searchQuery });
}
// Function to get info about search query
function getInfo(results) {
let details_link, endpoint, id;
try {
//determines what the search term is (artist, gene, art work etc.)
details_link = results._embedded.results[0]._links.self.href.substring(
api_path.length + 1
);
endpoint = details_link.split("/")[0];
endpoint = endpoint.substring(0, endpoint.length - 1);
id = details_link.split("/")[1];
} catch (e) {
return Promise.reject(e);
}
return artsyAPI(endpoint, { id }).then(filtered_results => {
return { type: endpoint, info: filtered_results };
});
}
// Accesses the artist's artworks using the artist id
function getArtistsArtwork(results) {
const artist_id = results.id;
if (results.birthday === "") {
return Promise.res.redirect('/error');
}
// handles artist specific searches
return artsyAPI("artworks", { artist_id }).then(artists_artworks => {
return artists_artworks._embedded.artworks;
});
}
// gets an artworks artist using the artwork id
function getArtworksArtist(results) {
const artwork_id = results.id;
// handles artwork specific searches
return artsyAPI("artists", { artwork_id }).then(artworks_artist => {
return artworks_artist._embedded.artists;
});
}
// Accesses similar artists with the artist id
function getSimilarArtists(results) {
const artist_id = results.id;
//handles artist specific searches
return artsyAPI("artists", {
similar_to_artist_id: artist_id
}).then(similar_artists => {
if (similar_artists._embedded.artists.length > 6) {
return similar_artists._embedded.artists.slice(0, 5);
} else {
return similar_artists._embedded.artists;
}
});
}
// Accesses similar artworks with the artwork id
function getSimilarArtworks(results) {
const artwork_id = results.id;
//handles artist specific searches
return artsyAPI("artworks", {
similar_to_artwork_id: artwork_id
}).then(similar_artworks => {
return similar_artworks._embedded.artworks;
});
}
// Gets each artist ready for Vis
function map_artists(artists) {
return (
Promise.resolve(artists)
.then(artists => artists.map(normalizeBirthday).filter(has_birthday))
.then(updateArtistsFromWiki)
.then(artists => artists.map(artistForVis))
// .then(logStep("after filtering artists"))
.catch(err => {
return [];
})
);
}
// Gets artist info from wiki
function getArtistFromWiki(artist) {
return new Promise((resolve, reject) => {
wikipedia.getData(
"http://en.wikipedia.org/wiki/" + modifyNameForWiki(artist),
resolve,
reject
);
});
}
// Gets info from wiki and takes death day (if present)
// If death day is not present, takes the min of (artist's birthday + 75) or current year
function updateArtistsFromWiki(artists) {
return Promise.map(artists, artist =>
getArtistFromWiki(artist)
.catch(console.error)
.then(wikiData => {
let endDates = wikiData.summary.endDates;
artist.end = normalizeDeathday(endDates);
return artist;
})
.catch(err => {
let thisYear = new Date().getFullYear();
let artistBirthday = Number(artist.birthday);
let endDate = Math.min(artistBirthday + 75, thisYear);
artist.end = "" + endDate;
return artist;
})
);
}
// Gets artist ready to send to Vis
function artistForVis(artist) {
const imageLink = artist._links.image.href;
const largeImage = imageLink.replace("{image_version}", "large");
return {
id: artist.id,
content: artist.name,
start: artist.birthday,
end: artist.end,
thumbnail: largeImage,
group: "Similar Artists",
className: "similar-artists"
};
}
// Gets each artwork ready for Vis
function map_artworks(artworks) {
if (!Array.isArray(artworks)) {
artworks = [artworks];
}
return Promise.map(artworks.filter(has_date), artwork =>
composeArtworkArtist(artwork)
).catch(err => {
console.error("map_artworks failure");
console.error(err);
return [];
});
}
function composeArtworkArtist(artwork) {
const artwork_id = artwork.id;
// handles artwork specific searches
return artsyAPI("artists", {
artwork_id: artwork_id
}).then(artworks_artist => {
const artworksArtist = artworks_artist._embedded.artists;
const imageLink = artwork._links.image.href;
const largeImage = imageLink.replace("{image_version}", "large");
return {
id: artwork.id,
content: "● " + artwork.title,
start: artwork.date.match(/\d+/)[0],
medium: artwork.medium,
thumbnail: largeImage,
group: "Artwork",
type: "point",
date: artwork.date,
dimensions: artwork.dimensions.cm.text,
artist: artworksArtist[0].name
};
});
}
// Flattens arrays of similar artists, artworks, and searched artist
function flatten(arr) {
return arr.reduce(function(flat, toFlatten) {
return flat.concat(
Array.isArray(toFlatten) ? flatten(toFlatten) : toFlatten
);
}, []);
}
// Checks if artist has birthday
function has_birthday(x) {
return !!x.birthday;
}
// Checks if artist has death day
function hasDeathDay(artist) {
return !!artist.end;
}
// Normalizes birthday so it is only a year
function normalizeBirthday(artist) {
if (artist.birthday) {
let m = artist.birthday.match(/\d{3,4}/);
if (m) {
artist.birthday = m[0];
} else {
artist.birthday = null;
}
}
return artist;
}
// Normalizes death day so it is only a year
function normalizeDeathday(endDates) {
return endDates.match(/\d{3,4}/)[0];
}
// Checks for date
function has_date(x) {
return x.date;
}
// Gets artist name ready for fetching from wiki
function modifyNameForWiki(artist) {
return artist.name.replace(/ /g, "_");
}
// get request to the api using the search bar (1st request)
app.get("/search", (req, res) => {
search(req.query.search)
// .then(logStep("search"))
.then(getInfo)
// .then(logStep("getInfo"))
.then(({ type, info }) => {
let ps;
if (type === "artist") {
let artistsArtwork = getArtistsArtwork(info).then(map_artworks);
let similarArtists = getSimilarArtists(info).then(map_artists);
ps = Promise.all([artistsArtwork, similarArtists, map_artists([info])])
// .then(logStep("process artist"))
.then(flatten);
} else if (type === "artwork") {
ps = Promise.all([
getSimilarArtworks(info).then(map_artworks),
getArtworksArtist(info).then(map_artists),
map_artworks(info)
]).then(([results, results2, results3]) => {
return flatten([results, results2, results3]);
});
} else {
throw new Error("unknown type: ", type);
}
return ps.then(similars => {
var nameTitle = info.name || info.title.replace(/"●"/g, "");
var titleToSlug = nameTitle.replace(/\s/g, "-").toLowerCase();
var artistName = info.slug.replace(titleToSlug, "").replace(/-/g, " ");
function makeTitle(artistName) {
var words = artistName.split(" ");
for (var i = 0; i < words.length; i++) {
words[i] = words[i].charAt(0).toUpperCase() + words[i].slice(1);
};
return words.join(" ");
}
var title = makeTitle(artistName)
var foundArtist = similars.find(function(similarObj){
if(similarObj.group === "Similar Artists" ){
return similarObj.content === info.name || similarObj.content.trim() === title.toString().trim()
}
});
if (foundArtist !== undefined) {
foundArtist.group = "Artist"
foundArtist.className = "selected-artist";
}
similars.sort(function(a, b) {
if (a.id < b.id) {
return -1;
} else if (a.id == b.id) {
return 0;
} else {
return 1;
}
});
if (req.query.format === "json") {
res.json({ info, similars });
} else {
res.render("timeline", { info, similars });
}
});
})
.catch(err => {
console.log("err", err)
res.redirect('/error');
});
});
app.set("view engine", "ejs");
app.use(express.static("public"));
app.use(express.static("public"));
app.get("/test/:query", function(req, res) {
wikipedia.getData(
"http://en.wikipedia.org/wiki/" + req.params.query,
function(wikiData) {
res.send(wikiData);
}
);
});
app.get("/", function(req, res) {
res.render("index");
});
app.get("/error", function(req, res){
res.render("error");
});
app.listen(PORT, () => {
console.log("Listening on port no." + PORT);
});