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DataBase.js
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DataBase.js
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const elasticsearch = require('elasticsearch')
const signale = require("signale")
const EventEmitter = require("events").EventEmitter
class DataBase extends EventEmitter {
async connect(truncate) {
this.client = new elasticsearch.Client({
node: 'http://localhost:9200',
compression: true
});
try {
await this.client.ping()
if (await this.client.indices.exists({
index: ["site", "feed", "op_file"]
}) && (!truncate))
signale.debug("Indices exist")
else {
await this.client.indices.delete({
index: "*" // Clear broken indices
})
signale.debug("Deleted all indices")
await this.client.indices.create({ // Difference between original names and these: '_' instead of '-'
index: "site",
body: {
"mappings": {
"properties": {
"address": { "type": "keyword" },
"title": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"files_number": { "type": "short" },
"op_files_number": { "type": "short" },
"domain": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"description": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"modified": {
"type": "date",
"format": "epoch_second"
},
"cloneable": { "type": "boolean" },
"cloned_from": { "type": "keyword" },
"background_color": { "type": "keyword" },
"peers": { "type": "short" },
"added": {
"type": "date",
"format": "epoch_second"
},
"size": { "type": "integer" },
"size_optional": { "type": "long" },
"zeronet_version": { "type": "keyword" },
"feeds": { "type": "keyword" }, // Array of feeds' ids (elasticsearch document id)
"op_files": { "type": "keyword" }, // Array of files' ids
"runtime": {
"properties": {
"feeds": {
"properties": {
"last_check": {
"type": "date",
"format": "epoch_millis"
},
"last_refresh": {
"type": "date",
"format": "epoch_millis"
}
}
},
"op_files": {
"properties": {
"last_check": {
"type": "date",
"format": "epoch_millis"
},
"last_refresh": {
"type": "date",
"format": "epoch_millis"
}
}
},
"database_scan": {
"type": "date",
"format": "epoch_millis"
},
"siteinfo": {
"type": "date",
"format": "epoch_millis"
}
}
},
"owner": { // e.g. zerotalk's settings.admin
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
}
}
}
}
})
await this.client.indices.create({
index: "op_file",
body: {
"mappings": {
"properties": {
"inner_path": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"hash_id": {
"type": "keyword"
},
"size": { "type": "integer" },
"peer": { "type": "short" },
"time_added": {
"type": "date",
"format": "epoch_second"
},
"description": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"title": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"siteId": {
"type": "keyword"
}
}
}
}
})
await this.client.indices.create({ // https://zeronet.io/docs/site_development/zeroframe_api_reference/#plugin-newsfeed
index: "feed",
body: {
"mappings": {
"properties": {
"item_type": {
"type": "keyword"
},
"date_added": {
"type": "date",
"format": "epoch_second"
},
"title": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"body": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"url": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"category": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"siteId": {
"type": "keyword"
}
}
}
}
})
signale.success("Indices created")
}
} catch (err) {
signale.error(err)
return
}
this.emit("connected")
}
async filterItemsBySiteId(siteId, indexName, fullDoc) {
return await this.client.search({
index: indexName,
body: {
"_source": fullDoc ? true : "_id",
"query": {
"constant_score": {
"filter": {
"term": {
siteId
}
}
}
}
}
})
}
async clearFeeds(siteId) {
return await this.client.deleteByQuery({
index: "feed",
type: "_doc",
body: {
"query": {
"constant_score": {
"filter": {
"term": {
siteId
}
}
}
}
}
})
}
async clearOpfiles(siteId) {
return await this.client.deleteByQuery({
index: "op_file",
type: "_doc",
body: {
"query": {
"constant_score": {
"filter": {
"term": {
siteId
}
}
}
}
}
})
}
async filterItemsToGetIds(siteId, indexName) {
return (await this.filterItemsBySiteId(siteId, indexName)).hits.hits.map(v => v._id)
}
async addFeeds(siteId, feeds, modification) {
if (feeds.length <= 0 || !siteId)
return
let operations = []
feeds.forEach(f =>
operations.push({ index: { _index: 'feed' } }, { ...f, siteId })
)
const res = await this.client.bulk({
refresh: true,
body: operations
})
if (res.errors)
signale.error(res)
modification.feeds = await this.filterItemsToGetIds(siteId, "feed")
}
async addOptionalFiles(siteId, optionals, modification) {
if (optionals.length <= 0 || !siteId)
return
let operations = []
optionals.forEach(f =>
operations.push({ index: { _index: 'op_file' } }, { ...f, siteId })
)
const res = await this.client.bulk({
refresh: true,
body: operations
})
if (res.errors)
signale.error(res)
modification.op_files = await this.filterItemsToGetIds(siteId, "op_file")
}
genNewSite(siteInfo) { // Generate a site obj with siteInfo
let site = {
runtime: {
feeds: {},
op_files: {}
}
}
site = this.setSiteInfo(site, siteInfo)
site.runtime.feeds.last_refresh = Date.now()
return site
}
setSiteInfo(site, siteInfoObj) { // siteInfoObj example: https://blurhy.xyz/2019/05/24/Horizon%E6%95%B0%E6%8D%AE%E7%9A%84%E5%88%9D%E6%AD%A5%E5%A4%84%E7%90%86/
siteInfoObj = { files: {}, files_optional: {}, ...siteInfoObj }
site = {
address: siteInfoObj.address,
title: siteInfoObj.title,
files_number: Object.keys(siteInfoObj.files).length,
op_files_number: Object.keys(siteInfoObj.files_optional).length,
domain: siteInfoObj.domain,
description: siteInfoObj.description,
modified: Math.floor(siteInfoObj.modified), // This modified field is signed by the owner and located in the content.json
cloneable: siteInfoObj.cloneable,
cloned_from: siteInfoObj.cloned_from,
background_color: siteInfoObj["background-color"],
peers: siteInfoObj.peers,
added: Math.floor(siteInfoObj.added),
size: siteInfoObj.size,
size_optional: siteInfoObj.size_optional,
zeronet_version: siteInfoObj.zeronet_version,
feeds: siteInfoObj.feeds || [],
op_files: siteInfoObj.op_files || []
}
if (!site.runtime)
site.runtime = {}
if (!site.runtime.feeds)
site.runtime.feeds = {
last_check: 0,
last_refresh: 0
}
if (!site.runtime.op_files)
site.runtime.op_files = {
last_check: 0,
last_refresh: 0
}
site.runtime.database_scan = 0
site.runtime.siteinfo = Date.now()
signale.info(`Updated site info for ${siteInfoObj.address}`)
return site
}
async addSite(doc) {
return await this.client.index({ index: "site", type: "_doc", body: doc })
}
async updateSite(newDoc, id) { // Partial update
await this.client.update({ index: "site", type: "_doc", id, body: { doc: newDoc } })
}
async getSite(address) {
try {
let hits = (await this.client.search({
index: "site",
body: {
"query": {
"constant_score": {
"filter": {
"term": {
address
}
}
}
}
}
})).hits.hits
if (hits.length === 0)
return
else
return hits[0]
}
catch (e) {
return null
}
}
}
module.exports = new DataBase()