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'use strict';

{

const { Observable } = window;

const makeUrl = ({ name, type }) =>

`https://api.github.com/${type}s/${name}/repos?per_page=100`;

class Model extends Observable {

constructor(account) {

super();

this.account = account;

this.state = {

repos: [],

selectedRepo: null,

contributors: [],

error: null,

};

}

async fetchData(id) {

const repoId = parseInt(id, 10);

this.state.error = null;

try {

if (this.state.repos.length === 0) {

const repos = await Model.fetchJSON(makeUrl(this.account));

this.state.repos = repos.sort((a, b) => a.name.localeCompare(b.name));

}

const index = id

? this.state.repos.findIndex(repo => repo.id === repoId)

: 0;

this.state.selectedRepo = this.state.repos[index];

this.state.contributors = await Model.fetchJSON(

this.state.selectedRepo.contributors_url,

);

} catch (err) {

this.state.error = err;

}

this.notify(this.state);

}

static fetchJSON(url) {

return fetch(url).then(res => {

if (!res.ok) {

return new Error(`HTTP ${res.status} - ${res.statusText}`);

}

return res.status === 200 ? res.json() : null;

});

}

}

window.Model = Model;

}