View Source CFSync (CFSync v0.14.0)
CFSync is an Elixir client for Contentful sync API.
features
Features
- Provides functions to extract field values from Contentful entries JSON payloads.
- Maps Contenful entries, assets, and links to Elixir structs. Using structs is better for readability, performance and reliability.
- Maps RichText data to Elixir structs.
- Keeps a cache of your entries and assets in a ETS table. This allows for fast (way faster than rest API calls) and concurrent reads.
- Keeps this cache up to date by regularly fetching changes from Contentful sync API
installation
Installation
Add :cf_sync
to your mix.exs
dependencies.
def deps do
[
{:cf_sync, "~> 0.1.0"},
]
end
basic-usage
Basic usage
# Define your fields mappings, one per content-type
defmodule MyApp.PageFields do
@behaviour CFSync.Entry.Fields
import CFSync.Entry.Extractors
defstruct :name, :body, :author
# See CFSync.Entry.Extractors for extract_* documentation
def new(data) do
%__MODULE__{
name: extract_binary(data, "name"),
body: extract_richtext(data, "body"),
author: extract_link(data, "author"),
}
end
end
# Define a mapping to map Contentful "contentType" ids to an atom name and a fields struct:
entries_mapping = %{
# "page" key is the content_type ID as configured in Contentful
"page" => %{
content_type: :page,
fields_module: MyApp.PageFields,
},
"author" => %{
content_type: :author,
fields_module: MyApp.AuthorFields,
}
# ...
}
# Start a CFSync process
{:ok, pid} =
CFSync.start_link(
MyApp.MyCFSync,
"Your_contentful_space_id",
"Your_contentful_delivery_api_token",
entries_mapping
)
# Use it
store = CFSync.from(MyApp.MyCFSync)
entry = CFSync.get_entry(store, "entry_id")
# entry ->
%CFSync.Entry{
id: "entry_id",
content_type: :page,
space_id: "your_space_id",
fields: %MyApp.PageFields{
name: "Lorem ipsum",
body: %CFSync.RichText{ #... },
author: %CFSync.Link{
id: "autor_id",
#... },
# ...
}
}
author = CFSync.get_link_target(store, entry.fields.author)
# author ->
%CFSync.Entry{
id: "author_id",
content_type: :author,
fields: %MyApp.AuthorFields{
# ...
}
}
!! Put your API token and space_id in your ENV, NOT in your code.
You should start the CFSync process in a supervision tree.
Link to this section Summary
Functions
Forces the store for name
to sync immediately. Use the name you provided to start_link/4
.
Get the CFSync store for name
. Use the name you provided to start_link/4
.
Get the asset specified by id
from the CFSync store store
.
Returns a list containg all assets from the CFSync store store
.
Resolves a link
(child entry or asset) from an entry field and returns the corresponding asset or entry.
Resolves a list of link
(children entries or assets) from an entry field and returns the corresponding assets or entries.
Returns a list containg all entries from the CFSync store store
.
Returns a list containg all entries of specified content_type
from the CFSync store store
.
Get the entry specified by id
from the CFSync store store
.
Resolves link
in the CFSync store store
and returns the corresponding asset or entry.
Phoenix.Component that renders RichText.
Starts CFSync GenServer
Link to this section Types
@opaque store()
Reference to a CFSync store.
Link to this section Functions
@spec force_sync(atom()) :: :ok
Forces the store for name
to sync immediately. Use the name you provided to start_link/4
.
CFSync regularly synces entries from Contentful API (see start_link/4
).
Calling this function triggers an immediate sync and resets the timer for the
next regular sync, so it will only happen after the full delay (:delta_sync_interval
)
counting from the immediate sync.
You can use Contentful publish
and unpublish
webhooks
to trigger calls to this function in order to achieve almost instant
synchronisation. You can then relax :delta_sync_interval
in the configuration
to lower the number of API requests made to Contentful.
CFSync.force_sync(MyApp.MyCFSync)
Get the CFSync store for name
. Use the name you provided to start_link/4
.
store = CFSync.from(MyApp.MyCFSync)
get_entries(store)
get_entry(store, "an_entry_id")
# ...
@spec get_asset(store(), binary()) :: nil | CFSync.Asset.t()
Get the asset specified by id
from the CFSync store store
.
Returns nil
if the asset is not found.
@spec get_assets(store()) :: [CFSync.Asset.t()]
Returns a list containg all assets from the CFSync store store
.
See get_entries/1
about performance.
@spec get_child(CFSync.Entry.t(), atom()) :: nil | CFSync.Entry.t() | CFSync.Asset.t()
Resolves a link
(child entry or asset) from an entry field and returns the corresponding asset or entry.
Returns nil
if the child entry or asset is not found.
@spec get_children(CFSync.Entry.t(), atom()) :: [ nil | CFSync.Entry.t() | CFSync.Asset.t() ]
Resolves a list of link
(children entries or assets) from an entry field and returns the corresponding assets or entries.
Returns the list of links mapped to the corresponding assets or entries.
If an entry or asset is not found, it will be mapped to nil
.
@spec get_entries(store()) :: [CFSync.Entry.t()]
Returns a list containg all entries from the CFSync store store
.
This function will retrieve ALL entries currently stored in the store's ETS table and deep copy them to the current process. Using this on a large Contentful space will be slow. If you want to retrieve all the entries to filter them, consider using something like memoize to cache the results.
@spec get_entries_for_content_type(store(), atom()) :: [CFSync.Entry.t()]
Returns a list containg all entries of specified content_type
from the CFSync store store
.
See get_entries/1
about performance.
@spec get_entry(store(), binary()) :: nil | CFSync.Entry.t()
Get the entry specified by id
from the CFSync store store
.
@spec get_link_target(store(), CFSync.Link.t()) :: nil | CFSync.Entry.t() | CFSync.Asset.t()
Resolves link
in the CFSync store store
and returns the corresponding asset or entry.
Returns nil
if link target is not not found.
@spec rich_text(map()) :: Phoenix.LiveView.Rendered.t()
Phoenix.Component that renders RichText.
You can pass these assigns:
- content: the %RichText{} struct to render
- class: a class attribute that will be added to root element of rendered HTML
- delegate: a module with custom components to use for rendering
Delegate and class are optional. To use delegate module, see RichTextRenderer and RichTextRendererTest modules
@spec start_link(atom(), String.t(), String.t(), map(), keyword()) :: :ignore | {:error, any()} | {:ok, pid()}
Starts CFSync GenServer
Should be started in a supervision tree
name
is an atom to reference this CFSync process. Use the samename
infrom/1
to query entries.space_id
is your Contentful space's IDdelivery_token
is your Contentful API tokencontent_types
is a map describing how to map Contentful entries to elixir structs. See module doc.
options
Options
:locale
- The locale you want to fetch from Contentful. Defaults to"en-US"
:root_url
- Default is"https://cdn.contentful.com/"
:initial_sync_interval
- The server will wait for this interval between two page requests during initial sync. Defaults to 30 milliseconds.:delta_sync_interval
- The server will wait for this interval between two sync requests. Defaults to 5000 milliseconds. You can use a shorter delay to get updates faster, but you will be rate limited by Contentful if you set it too short.:invalidation_callbacks
- List of 0-arity anonymous functions that will be called after each sync operation that actually adds, updates or deletes some entries.