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database.js
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database.js
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var fs = require('fs');
exports.init = function (dataDir) {
var db = new DB();
loadData(dataDir + "/users/",
function (data) { db.addUser(data); });
return db;
};
function DB() {
this.users = {};
this.categories = {};
}
DB.prototype = {
addUser: function (data) {
console.log("Add user: " + data.id);
this.users[data.id] = data;
},
newEmptyExhibit: function () {
var empty = this.newEmptyItem();
return {
name: "[Name your exhibit]",
items: [empty, empty, empty, empty, empty]
}
},
newEmptyItem: function () {
return {
"subject": "",
"label": {"en": ""},
"thumbnail": "/images/exhibit_placeholder.png",
"homepage": ""
};
},
addItem: function (curator, exhibit, newItem) {
var newItem = this.completeItem(newItem);
var items = exhibit.items;
var added = false;
for (var i=0, ln=items.length; i < ln; i++) {
var it = items[i];
if (!it.subject) {
items[i] = newItem;
added = true;
break;
}
}
if (!added) {
items.push(newItem);
}
this.persist(curator);
},
completeItem: function (item) {
// TODO: lookup record from subject, save title, better image link, description...
if (!item.categories)
item.categories = [];
if (!item.homepage)
item.homepage = null;
return item;
},
persist: function (curator) {
var json = JSON.stringify(curator, null, 2)
// TODO: this.saveToDisk(getFileFor(curator), json);
console.log(json);
}
};
function loadData(dir, callback) {
fs.readdirSync(dir).forEach(function (fname) {
var dpath = dir + fname;
if (fs.statSync(dpath).isDirectory()) {
var fpath = dpath + "/data.json";
console.log("Loading data from: " + fpath);
callback(exports.loadJSON(fpath));
}
});
}
exports.loadJSON = function (fpath) {
var str = fs.readFileSync(fpath, "utf-8");
return JSON.parse(str);
};
exports.toSlugId = function (label) {
return label.toLowerCase().replace(/\s+/g, '_').replace(/[^A-Za-z0-9]/g, '0');
};