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Dimer datastore

Dimer datastore saves the websites, their versions and documents for each version.

The datastore operates on JSON flat files and exposes API to mutate and read the store.

Installation

``bash
npm i @dimerapp/datastore

Yarn


yarn add @dimerapp/datastore
`

Data Structure

Following is the data structure of all the nodes inside the store. The required properties are required to mutate the store.

#### Site
Site is a given website, with it's own domain.

| Key | Value | Required | Description |
|-----|-------|---------|--------------|
| domain | String | NO | The domain of the website. If it's stored on dimer servers, then this is the subdomain test.dimerapp.com |
| cname | String | NO | CNAME to dimer subdomain |
| settings | Object | NO | An arbitrary object containing website settings. This is usually used by the themes |

#### Zones
Zones are the way to divide sections of your website docs into multiple top levels. For example: Guides, API, FAQ's and so on.

| Key | Value | Required | Description |
|-----|-------|----------|-------------|
| slug (unique) | String | Yes | The slug to be used for uniquely identifying the zone. |
| name | String | No | The display name for the zone |
| versions | Array | Yes | The versions for the zone |

#### Versions
Versions for a given zone. When your are not using zones, then the versions become the part of a virtual zone.

| Key | Value | Required | Description |
|-----|-------|---------|--------------|
| no (unique) | String | YES | The version number. It must be URL friendly |
| name | String | No | Version no will be used as the name if not defined.
| default | Boolean | No | Is this the default version for documentation. If not defined, the greatest number will be considered as the default version. |
| depreciated | Boolean | No | Is this version depreciated |
| draft | Boolean | No | Is this version a draft |

#### Docs
The documentation node associated with a version always.

| Key | Value | Required | Description |
|-----|-------|---------|--------------|
| content | Object | Yes | The object of nodes, returned by @dimerapp/markdown.
| permalink (unique) | String | Yes | The unique permalink for the doc. This is the URL people will visit to read the doc |
| title | String | Yes | The title for the document. First h1 will be used if missing.
| jsonPath (unique) | String | Yes | The relative path, where the content should be saved |
| summary | String | No | The document social summary. If missing will be fetched from the content.
| redirects | Array[String] | No | An array of permalinks to be redirected to this document. |

Usage

After installation you can grab the datastore as follows and save documents.

`js
const Datastore = require('@dimerapp/datastore')
const Context = require('@dimerapp/context')

const ctx = new Context(__dirname)
const store = new Datastore(ctx)

await store.load()
`

#### load(clean = false)
Load the data store to start mutating it, if store is not loaded, hard exceptions will be raised.

Also when you pass clean=true, it will load the store from a clean slate. It is helpful, when you want to build documentation from scratch.

`js
await store.load()

// from clean slate

await store.load(true)
`

#### saveDoc(zoneSlug, versionNo, filePath, doc)
Save a new doc to the datastore.

- The slug for the zone. If missing, it will be created on the fly.
- If the version is missing, it will be created on the fly.
- If filePath exists, the doc will be updated.
- If permalink exists, an exception will be raised.

`js
const markdown = new Markdown('# Hello world')
const content = await markdown.toJSON()

// save actual doc
await store.saveDoc(
'guides',
'1.0.0',
'introduction.md',
{
permalink: 'introduction',
content: content
}
)

// update meta data to database
await store.persist()
`

#### removeDoc(zoneSlug, versionNo, filePath)
Remove doc from the store.

`js
await store.removeDoc('guides', '1.0.0', 'introduction.md')

// update meta data to database
await store.persist()
`

#### syncZones(zones)
Syncs the zones inside the db. Also versions for each zone will be synced automatically. Each zone will have a diff node for versions too.

`js
const { added, updated, removed } = await store.syncZones(zones)
console.log(added.versions) // { added: [], updated: [], removed: [] }
`

#### syncVersions(zoneSlug, versions)
Sync an array of versions with the existing one's. Since all versions are saved inside the config dimer.json file, it is impossible to detect which version was added and which was removed to perform individual operations like add, remove. For the very same reason, datastore exposes the API to sync them.

`js
await store.syncVersions('guides', [
{
no: 'master',
name: 'Version master',
default: true
},
{
no: 'v4.0',
name: 'Version 4.0'
},
{
no: 'v3.0',
name: 'Version 3.0',
depreciated: true
}
])

// update meta data to database
await store.persist()
`

#### getVersions(zoneSlug)
Returns an array of saved versions.

`js
store.getVersions('guides')
`

#### getTree(zoneSlug, versionNo, limit = 0, withContent = false, attachVersion = false)
Get an array of all the docs. Ideally you want this array to create a navigation menu and then on each request, you can ask for the doc content. However...

- You can pass withContent=true and the array will have the actual content for the doc too.
- Setting limit=0 will return all the docs.
- All docs will be grouped by categories.
- When attachVersion=true. Each doc will contain it's version node.

`js
const tree = await store.getTree('guides', 'v4.0')

// output
[
{
category: 'Getting started',
docs: [{
permalink: ''
}]
}
]
`

#### getDoc(zoneSlug, versionNo, filePath, attachVersion = false)
Returns the doc meta data and it's content.

- When attachVersion=true. Doc will contain it's version node.

`js
const doc = await store.getDoc('guides', 'v4.0', 'introduction.md')
`

#### getDocByPermalink(zoneSlug, versionNo, permalink, attachVersion = false)
Returns the doc by it's permalink.

- When attachVersion=true. Doc will contain it's version node.

`js
const doc = await store.getDocByPermalink('guides', 'v4.0', '/introduction')
`

#### redirectedPermalink(zoneSlug, versionNo, permalink)
Returns the new permalink at which the doc must be redirected.

`js
const redirectTo = store.redirectedPermalink('guides', 'v4.0', '/old-introduction')

if (redirectTo) {
// redirect to this location
}
`

#### syncConfig(config)
Sync the config file with the datastore.

`js
await store.syncConfig(require('./dimer.json'))
`

#### getConfig
Returns the synced config

`js
const config = store.getConfig()
`

Search

The datastore builds a search index based on elasticlunr, which can be used for indexing a individual version and then performing search queries for same.

ALWAYS MAKE SURE TO CREATE SEARCH INDEXES AT LAST. SAVING A NEW DOC WILL NOT UPDATE THE INDEX.

`js
await store.indexVersion('guides', 'v4.0')
`

And then later search

`js
const results = await store.search('guides', 'v4.0', 'Yaml')
`

Following will be the output of search results

`js
[
{
ref: '/yaml-front-matter',
title: {
score: 3.10,
marks: [
{
type: 'raw',
text: 'What is'
},
{
type: 'mark',
text: 'Yaml'
},
{
type: 'raw',
text: 'frontmatter'
}
]
},
body: [
{
score: 2.984,
marks: [{
type: 'mark',
text: 'Yaml '
},
{
type: 'raw',
text: 'front matter is used for'
}]
}
]
}
]
`

$3

The datastore has support for multiple languages to create the search index. Following
is the list of allowed and supported languages.

English en is the default language.

- da (Danish)
- de (German)
- du (Dutch)
- es (Spanish)
- fi (Finnish)
- fr (French)
- hu (Hungarian)
- it (Italian)
- ja (Japanese)
- no (Norwegian)
- pt (Portuguese)
- ro (Romanian)
- ru (Russian)
- sv (Swedish)
- th (Thai)
- tr (Turkish)

`js
await store.indexVersion('guides', 'v4.0', 'de')
`

If your content is written in the mix of multiple languages, then you can pass an array of languages instead.

`js
await store.indexVersion('guides', 'v4.0', ['de', 'en'])
``

Change log

The change log can be found in the CHANGELOG.md file.

Contributing

Everyone is welcome to contribute. Please take a moment to review the contributing guidelines.

Authors & License

thetutlage and contributors.

MIT License, see the included MIT file.

[travis-image]: https://img.shields.io/travis/dimerapp/datastore/master.svg?style=flat-square&logo=travis
[travis-url]: https://travis-ci.org/dimerapp/datastore "travis"

[npm-image]: https://img.shields.io/npm/v/@dimerapp/datastore.svg?style=flat-square&logo=npm
[npm-url]: https://npmjs.org/package/@dimerapp/datastore "npm"