insomnia/app/backend/database/index.js
2016-09-21 20:56:35 -07:00

405 lines
9.3 KiB
JavaScript

'use strict';
const electron = require('electron');
const NeDB = require('nedb');
const fsPath = require('path');
const {DB_PERSIST_INTERVAL} = require('../constants');
const {generateId} = require('../util');
const {isDevelopment} = require('../appInfo');
module.exports.CHANGE_INSERT = 'insert';
module.exports.CHANGE_UPDATE = 'update';
module.exports.CHANGE_REMOVE = 'remove';
// ~~~~~~ //
// MODELS //
// ~~~~~~ //
module.exports.stats = require('./models/stats');
module.exports.settings = require('./models/settings');
module.exports.workspace = require('./models/workspace');
module.exports.environment = require('./models/environment');
module.exports.cookieJar = require('./models/cookieJar');
module.exports.requestGroup = require('./models/requestGroup');
module.exports.request = require('./models/request');
module.exports.response = require('./models/response');
const MODELS = [
module.exports.stats,
module.exports.settings,
module.exports.workspace,
module.exports.environment,
module.exports.cookieJar,
module.exports.requestGroup,
module.exports.request,
module.exports.response
];
const MODEL_MAP = {};
module.exports.initModel = doc => Object.assign({
modified: Date.now(),
created: Date.now(),
parentId: null
}, doc);
module.exports.ALL_TYPES = MODELS.map(m => m.type);
for (const model of MODELS) {
MODEL_MAP[model.type] = model;
}
// ~~~~~~~ //
// HELPERS //
// ~~~~~~~ //
let db = null;
function getDBFilePath (modelType) {
// NOTE: Do not EVER change this. EVER!
const basePath = electron.remote.app.getPath('userData');
return fsPath.join(basePath, `insomnia.${modelType}.db`);
}
/**
* Initialize the database. This should be called once on app start.
* @returns {Promise}
*/
let initialized = false;
module.exports.initDB = (config = {}, force = false) => {
// Only init once
if (initialized && !force) {
return Promise.resolve();
}
return new Promise(resolve => {
db = {};
if (isDevelopment()) {
global.db = db;
}
// Fill in the defaults
module.exports.ALL_TYPES.map(t => {
const filename = getDBFilePath(t);
const autoload = true;
const finalConfig = Object.assign({filename, autoload}, config);
db[t] = new NeDB(finalConfig);
db[t].persistence.setAutocompactionInterval(DB_PERSIST_INTERVAL)
});
// Done
initialized = true;
console.log(`-- Initialize DB at ${getDBFilePath('t')} --`);
resolve();
});
};
// ~~~~~~~~~~~~~~~~ //
// Change Listeners //
// ~~~~~~~~~~~~~~~~ //
let bufferingChanges = false;
let changeBuffer = [];
let changeListeners = [];
let bufferTimeout = null;
module.exports.onChange = callback => {
console.log(`-- Added DB Listener -- `);
changeListeners.push(callback);
};
module.exports.offChange = callback => {
console.log(`-- Removed DB Listener -- `);
changeListeners = changeListeners.filter(l => l !== callback);
};
module.exports.bufferChanges = (millis = 1000) => {
bufferingChanges = true;
bufferTimeout = setTimeout(() => {
module.exports.flushChanges()
}, millis);
};
module.exports.flushChanges = () => {
clearTimeout(bufferTimeout);
bufferingChanges = false;
bufferTimeout = null;
const changes = [...changeBuffer];
changeBuffer = [];
// Notify async so we don't block
process.nextTick(() => {
changeListeners.map(fn => fn(changes));
})
};
function notifyOfChange (event, doc) {
changeBuffer.push([event, doc]);
// Flush right away if we're not buffering
if (!bufferingChanges) {
module.exports.flushChanges();
}
}
// ~~~~~~~ //
// Helpers //
// ~~~~~~~ //
module.exports.getMostRecentlyModified = (type, query = {}) => {
return new Promise(resolve => {
db[type].find(query).sort({modified: -1}).limit(1).exec((err, docs) => {
resolve(docs.length ? docs[0] : null);
})
})
};
module.exports.find = (type, query = {}) => {
return new Promise((resolve, reject) => {
db[type].find(query, (err, rawDocs) => {
if (err) {
return reject(err);
}
const modelDefaults = MODEL_MAP[type].init();
const docs = rawDocs.map(rawDoc => {
return Object.assign({}, modelDefaults, rawDoc);
});
resolve(docs);
});
});
};
module.exports.all = type => {
return module.exports.find(type);
};
module.exports.getWhere = (type, query) => {
return new Promise((resolve, reject) => {
db[type].find(query, (err, rawDocs) => {
if (err) {
return reject(err);
}
if (rawDocs.length === 0) {
// Not found. Too bad!
return resolve(null);
}
const modelDefaults = MODEL_MAP[type].init();
resolve(Object.assign({}, modelDefaults, rawDocs[0]));
});
});
};
module.exports.get = (type, id) => {
return module.exports.getWhere(type, {_id: id});
};
module.exports.count = (type, query = {}) => {
return new Promise((resolve, reject) => {
db[type].count(query, (err, count) => {
if (err) {
return reject(err);
}
resolve(count);
});
});
};
module.exports.insert = doc => {
return new Promise((resolve, reject) => {
db[doc.type].insert(doc, (err, newDoc) => {
if (err) {
return reject(err);
}
resolve(newDoc);
notifyOfChange(module.exports.CHANGE_INSERT, doc);
});
});
};
module.exports.update = doc => {
return new Promise((resolve, reject) => {
db[doc.type].update({_id: doc._id}, doc, err => {
if (err) {
return reject(err);
}
resolve(doc);
notifyOfChange(module.exports.CHANGE_UPDATE, doc);
});
});
};
module.exports.remove = doc => {
module.exports.bufferChanges();
return new Promise(resolve => {
module.exports.withDescendants(doc).then(docs => {
const docIds = docs.map(d => d._id);
const types = [...new Set(docs.map(d => d.type))];
const promises = types.map(t => {
db[t].remove({_id: {$in: docIds}}, {multi: true})
});
Promise.all(promises).then(() => {
docs.map(d => notifyOfChange(module.exports.CHANGE_REMOVE, d));
resolve();
module.exports.flushChanges();
});
});
});
};
/**
* Remove a lot of documents quickly and silently
*
* @param type
* @param query
* @returns {Promise.<T>}
*/
module.exports.removeBulkSilently = (type, query) => {
return new Promise(resolve => {
db[type].remove(query, {multi: true}, err => resolve());
});
};
// ~~~~~~~~~~~~~~~~~~~ //
// DEFAULT MODEL STUFF //
// ~~~~~~~~~~~~~~~~~~~ //
module.exports.docUpdate = (originalDoc, patch = {}) => {
const doc = Object.assign(
MODEL_MAP[originalDoc.type].init(),
originalDoc,
patch,
{modified: Date.now()}
);
return module.exports.update(doc);
};
module.exports.docCreate = (type, patch = {}) => {
const idPrefix = MODEL_MAP[type].prefix;
if (!idPrefix) {
throw new Error(`No ID prefix for ${type}`)
}
const doc = Object.assign(
{_id: generateId(idPrefix)},
MODEL_MAP[type].init(),
patch,
// Fields that the user can't touch
{
type: type,
modified: Date.now()
}
);
return module.exports.insert(doc);
};
// ~~~~~~~ //
// GENERAL //
// ~~~~~~~ //
module.exports.withDescendants = (doc = null) => {
let docsToReturn = doc ? [doc] : [];
const next = (docs) => {
const promises = [];
for (const doc of docs) {
for (const type of module.exports.ALL_TYPES) {
// If the doc is null, we want to search for parentId === null
const parentId = doc ? doc._id : null;
const promise = module.exports.find(type, {parentId});
promises.push(promise);
}
}
return Promise.all(promises).then(results => {
let newDocs = [];
// Gather up the docs = require(each type
for (const docs of results) {
for (const doc of docs) {
newDocs.push(doc);
}
}
if (newDocs.length === 0) {
// Didn't find anything. We're done
return new Promise(resolve => resolve(docsToReturn));
}
// Continue searching for children
docsToReturn = [...docsToReturn, ...newDocs];
return next(newDocs);
});
};
return next([doc]);
};
module.exports.duplicate = (originalDoc, patch = {}, buffer = true) => {
buffer && module.exports.bufferChanges();
return new Promise((resolve, reject) => {
// 1. Copy the doc
const newDoc = Object.assign({}, originalDoc, patch);
delete newDoc._id;
delete newDoc.created;
delete newDoc.modified;
module.exports.docCreate(newDoc.type, newDoc).then(createdDoc => {
// 2. Get all the children
const promises = [];
for (const type of module.exports.ALL_TYPES) {
const parentId = originalDoc._id;
const promise = module.exports.find(type, {parentId});
promises.push(promise);
}
Promise.all(promises).then(results => {
let duplicatePromises = [];
// Gather up the docs = require(each type
for (const docs of results) {
for (const doc of docs) {
const promise = module.exports.duplicate(
doc,
{parentId: createdDoc._id}
);
duplicatePromises.push(promise);
}
}
// 3. Also duplicate all children, and recurse
Promise.all(duplicatePromises).then(() => {
buffer && module.exports.flushChanges();
resolve(createdDoc)
}, err => {
reject(err);
})
})
})
})
};