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openproject/docs/api/bcf/bcf-rest-api.md

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# BCF REST API
![](BCFicon128.png)
The following describes the extensions and deviations of the BCF API v2.1 implementation in OpenProject.
This document should be read as an extension to the [standard specification](https://github.com/buildingSMART/BCF-API/blob/release_2_1/README.md).
The user should read the standard specification first, and then take a look at this document to be informed about OpenProject specificities.
While the intent of the implementation is to follow the specification, the API builds on the existing OpenProject data
schema and by that requires to map between the concepts required in the much broader domain of project management and BCF.
In other parts, the BCF API specification has not been completely implemented. It will be amended where requirements dictate.
OpenProject offers a second API (v3) which might be able to fill the gaps the BCF API implementation still has.
The document follows the structure of the standard specification to ease comparing the two documents.
# 1. Introduction
All end points are nested within the `/api` path. So for a server listening on `https://foo.com/` the API root will be
`https://foo.com/api/bcf/2.1`. For a server listening on `https://foo.com/bar` the API root will be
`https://foo.com/bar/api/bcf/2.1`.
## 1.1 Paging, Sorting and Filtering
_Not implemented_
## 1.2 Caching
_Implemented_
## 1.3 Updating Resources via HTTP PUT
_Implemented_
## 1.4 Cross Origin Resource Sharing (CORS)
_Not implemented_
## 1.5 Http Status Codes
_Implemented_
## 1.6 Error Response Body Format
_Implemented_
## 1.7 DateTime Format
_Implemented_
## 1.8 Authorization
_Implemented_
Authorization is granted based on the _view_linked_issues_ and the _manage_bcf_ permission. As BCFs share part of their
data structure with WorkPackages, which enables them to be worked on by the project team just like any other work package,
a user also needs to have the _view_work_packages_ permission to have _view_linked_issues_. For _manage_bcf_ the permissions
_view_work_packages_, _add_work_packages_, _edit_work_packages_ and _delete_work_packages_ are dependently required.
### 1.8.1 Per-Entity Authorization
_Implemented_
The `authorization` field is always returned, regardless of an `includeAuthorization` query parameter.
### 1.8.2 Determining Authorized Entity Actions
_Implemented_
## 1.9 Additional Response and Request Object Properties
The implementation relies on a client to particularly adhere to this.
## 1.10 Binary File Uploads
_Implemented_
# 2. Topologies
_Out of scope_
# 3. Public Services
## 3.1 Versions Service
_Not implemented_
## 3.2 Authentication Services
### 3.2.1 Obtaining Authentication Information
_Implemented_
The following OAuth2 flows are supported:
* `authorization_code_grant` - [4.1 - Authorization Code Grant](https://tools.ietf.org/html/rfc6749#section-4.1)
* `client_credentials` - [4.4 - Client Credentials Grant](https://tools.ietf.org/html/rfc6749#section-4.4)
The `clients_credentials` grant explicitly ruled out by the standard specification as not being user specific can be supported by OpenProject as the grant is mapped to a user account
when configuring the OAuth access.
Before a client is able to perform the flows, they need to be [configured in OpenProject](https://docs.openproject.org/system-admin-guide/authentication/oauth-applications/). `bcf_v2_1` needs
to be checked for the scope. That value also needs to be provided for the scope property in OAuth requests.
The OAuth2 flows alternatively proposed by the specification
* `implicit_grant` - [4.2 - Implicit Grant](https://tools.ietf.org/html/rfc6749#section-4.2)
* `resource_owner_password_credentials_grant` - [4.3 - Resource Owner Password Credentials Grant](https://tools.ietf.org/html/rfc6749#section-4.3)
are not implemented.
### 3.2.2 OAuth2 Example
_Out of scope_
### 3.2.3 OAuth2 Protocol Flow - Dynamic Client Registration
_Not implemented_
## 3.3 User Services
### 3.3.1 Get current user
_Implemented_
# 4. BCF Services
## 4.1 Project Services
The `project_id` is an integer value. However, the API also understands requests where the project identifier, e.g. `bcf_project`
is used instead of the integer within a url. So the following urls might point to the same project resource: `/api/bcf/2.1/projects/3` and `/api/bcf/2.1/projects/bcf_project`.
### 4.1.1 GET Projects Service
_Partly implemented_
The end point is implemented but lacks the `authorization` property. However, the [Project Extension Service](#414-get-project-extension-service) is completely implemented and provides the same information.
### 4.1.2 GET Project Service
_Partly implemented_
The end point is implemented but lacks the `authorization` property. However, the [Project Extension Service](#414-get-project-extension-service) is completely implemented and provides the same information.
### 4.1.3 PUT Project Service
_Implemented_
### 4.1.4 GET Project Extension Service
_Implemented and extended_
However, as some end points are not implemented, the actions indicating the ability to call those end points will also not be returned, e.g. `updateDocumentReferences`
### 4.1.5 Expressing User Authorization Through Project Extensions
_Out of scope_
#### 4.1.5.1 Project
_Implemented and extended_
* *viewTopic* - The ability to see topics (see [4.2.3 GET Topic Service](#423-get-topic-service))
#### 4.1.5.2 Topic
_Implemented_
#### 4.1.5.3 Comment
_Implemented_
## 4.2 Topic Services
BCF topics are tightly coupled to work packages in OpenProject. This coupling is denoted in the `reference_links` property
of a topic which will always have a link to the work package resource in the API v3. e.g.:
```
<-- other properties -->
"reference_links": [
"/api/v3/work_packages/92"
],
<-- other properties -->
```
### 4.2.1 GET Topics Service
_Partly implemented_
The following properties are not supported:
* `labels` (the property exists but cannot be written and is always empty)
* `stage` (the property exists but cannot be written and is always null)
* `bim_snippet.snippet_type`
* `bim_snippet.is_external`
* `bim_snippet.reference`
* `bim_snippet.reference_schema`
OData sort, filtering and pagination is not supported.
### 4.2.2 POST Topic Service
_Partly implemented_
See [4.2.3 GET Topic Service](#423-get-topic-service) for details.
Either a new work package is created or, if a work package is referenced in the `reference_links` section, a the referenced
work package is associated to the newly created topic. A work package can only be associated to one topic and vice versa.
### 4.2.3 GET Topic Service
_Partly implemented_
See [4.2.3 GET Topic Service](#423-get-topic-service) for details.
### 4.2.4 PUT Topic Service
_Partly implemented_
The reference to the work package cannot be altered.
See [4.2.3 GET Topic Service](#423-get-topic-service) for details.
### 4.2.5 DELETE Topic Service
_Implemented_
The associated work package will also be deleted.
### 4.2.6 GET Topic BIM Snippet Service
_Not implemented_
### 4.2.7 PUT Topic BIM Snippet Service
_Not implemented_
## 4.3 File Services
### 4.3.1 GET Files (Header) Service
_Not implemented_
### 4.3.2 PUT Files (Header) Service
_Not implemented_
## 4.4 Comment Services
### 4.4.1 GET Comments Service
_Not implemented_
### 4.4.2 POST Comment Service
_Not implemented_
### 4.4.3 GET Comment Service
_Not implemented_
### 4.4.4 PUT Comment Service
_Not implemented_
### 4.4.5 DELETE Comment Service
_Not implemented_
### 4.4.6 Determining allowed Comment modifications
_Not implemented_
## 4.5 Viewpoint Services
### 4.5.1 GET Viewpoints Service
_Implemented_
### 4.5.2 POST Viewpoint Service
_Implemented_
#### 4.5.2.1 Point
_Implemented_
#### 4.5.2.2 Direction
_Implemented_
#### 4.5.2.3 Orthogonal camera
_Implemented_
#### 4.5.2.4 Perspective camera
_Implemented_
#### 4.5.2.5 Line
_Implemented_
#### 4.5.2.6 Clipping plane
_Implemented_
#### 4.5.2.7 Bitmap
_Implemented_
#### 4.5.2.8 Snapshot
_Implemented_
#### 4.5.2.9 Components
_Implemented_
#### 4.5.2.10 Component
_Implemented_
#### 4.5.2.11 Coloring
_Implemented_
#### 4.5.2.12 Visibility
_Implemented_
#### 4.5.2.13 View setup hints
_Implemented_
### 4.5.3 GET Viewpoint Service
_Implemented_
### 4.5.4 GET Viewpoint Snapshot Service
_Implemented_
### 4.5.6 GET selected Components Service
_Implemented_
### 4.5.7 GET colored Components Service
_Implemented_
### 4.5.8 GET visibility of Components Service
_Implemented_
## 4.6 Related Topics Services
### 4.6.1 GET Related Topics Service
_Not implemented_
### 4.6.2 PUT Related Topics Service
_Not implemented_
## 4.7 Document Reference Services
### 4.7.1 GET Document References Service
_Not implemented_
### 4.7.2 POST Document Reference Service
_Not implemented_
### 4.7.3 PUT Document Reference Service
_Not implemented_
## 4.8 Document Services
### 4.8.1 GET Documents Service
_Not implemented_
### 4.8.2 POST Document Service
_Not implemented_
### 4.8.3 GET Document Service
_Not implemented_
## 4.9 Topics Events Services
### 4.9.1 GET Topics Events Service
_Not implemented_
### 4.9.2 GET Topic Events Service
_Not implemented_
## 4.10 Comments Events Services
_Not implemented_
### 4.10.1 GET Comments Events Service
_Not implemented_
### 4.10.2 GET Comment Events Service
_Not implemented_