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docs(revision): add some documentation for the reformed revision system
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@JoelAlphonso
JoelAlphonso committed Nov 3, 2022
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105 changes: 78 additions & 27 deletions packages/object/README.md
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Expand Up @@ -16,7 +16,7 @@ Object definition (Content and UserData), behaviors and tools.
- [Category](#category)
- [Hierarchical](#hierarchical)
- [Publishable](#publishable)
- [Revisionable](#revisionable)
- [Revisionable](#revision-manager)
- [Routable](#routable)
- [Helpers](#helpers)
- [ObjectDraft](#objectdraft)
Expand Down Expand Up @@ -128,7 +128,6 @@ The **UserData** class should be used for all objects that are expected to be en
- [Category](#category)
- [Hierarchical](#hierarchical)
- [Publishable](#publishable)
- [Revisionable](#revisionable)
- [Routable](#routable)

### Archivable
Expand Down Expand Up @@ -225,26 +224,78 @@ _The archivable behavior is not yet documented. It is still under heavy developm

> Default metadata is defined in `metadata/charcoal/object/publishable-interface.json`.
### Revisionable
### Revision Manager

Revisionable objects implement `\Charcoal\Object\Revision\RevisionableInterface`, which can be easily implemented by using `\Charcoal\Object\Revision\RevisionableTrait`.
The Revision Manager is a service that handles every related tasks with keeping revisions of objects implementing `\Charcoal\Model\ModelInterface`.

Revisionable objects create _revisions_ which logs the changes between an object's versions, as _diffs_.
The manager creates _revisions_ which logs the changes between an object's versions, as _diffs_.

The `\Charcoal\Object\Listener` is a listener available to map a Model to a revision generation.

**API**

- `setRevisionEnabled(bool$enabled)`
- `revisionEnabled()`
- `revisionObject()`
- `generateRevision()`
- `latestRevision()`
- `revisionNum(integer $revNum)`
- `revisionForNumber(integer $revNum)`
- `allRevisions(callable $callback = null)`
- `revertToRevision(integer $revNum)`

**Properties (metadata)**
**USAGE**

```PHP
$revisionMangager->setModel($model)->generateRevision();
```

The revision manager also looks for a configuration in the app config keyed `revisions`.
This config gives projects control over the revision system like disabling the revisions or specifying what models to enable
revisions for. The following example can be used to enable revisions for all content models in a project:

```JSON
{
"revisions": {
"enabled": true,
"excludedProperties": [
"created",
"lastModified",
"createdBy",
"lastModifiedBy",
"active",
"locked",
"requiredAclPermissions",
"position"
],
"models": {
"Charcoal\\Object\\Content": {}
}
}
}
```

**Config options**

| Key | Description | Type | Default Value |
|--------------------------|---------------------------------------------------------------------------------------------|-----------------------------------------|----------------------------------|
| **enabled** | Enable or not the revisions. | `bool` | `true` |
| **revisionClass** | Change the revision object class. | `string` | `Charcoal\Object\ObjectRevision` |
| **limitPerModel** (TODO) | Define a limit of revisions per model. | `int|null` | `null` |
| **models** | Specify which models to enable revisions for and and what options to apply. See next table. | `object<model: string, options: array>` | `[]` |
| **excludedProperties** | Exclude properties from the revision process. | `string[]` | `[]` |


**Models options**

| Key | Description | Type | Default Value |
|--------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------|----------------------------------|
| **enabled** | Enable or not the revisions for the model. Important to note that class inheritance is respected, meaning enabling revisions for a high order model will also enable revisions for it's children. | `bool` | `true` |
| **revisionClass** | Change the revision object class for a specific model and it's children. | `string` | `Charcoal\Object\ObjectRevision` |
| **limitPerModel** (TODO) | Define a limit of revisions per model. | `int&#124;null` | `null` |
| **properties** | Limits the revision process to only these properties, disregarding property exclusions and inclusions. | `string[]` | `[]` |
| **excludedProperties** | Exclude properties from the revision process. | `string[]` | `[]` |
| **includedProperties** | Include properties in the revision process. By default, all properties are included, so this can be used to include a property that was excluded by a parent. | `string[]` | `[]` |


_The revisionable behavior does not implement any properties as all logic & data is self-contained in the revisions._

### Routable

Expand All @@ -262,16 +313,16 @@ Upon every `update` in _storage_, a revisionable object creates a new *revision*

**Revision properties**

| Property | Type | Default | Description |
| ------------------ | ------------ | ---------- | ----------- |
| **target_type** | `string` | `null` | The object type of the target object.
| **target_id** | `string` | `null` | The object idenfiier of the target object.
| **rev_num** | `integer` | `null` | Revision number, (auto-generated).
| **ref_ts** | `date-time` | |
| **rev_user** | `string` | `null` |
| **data_prev** | `structure` | |
| **data_obj** | `structure` | |
| **data_diff** | `structure` | |
| Property | Type | Default | Description |
|-----------------|-------------|---------|--------------------------------------------|
| **target_type** | `string` | `null` | The object type of the target object. |
| **target_id** | `string` | `null` | The object idenfiier of the target object. |
| **rev_num** | `integer` | `null` | Revision number, (auto-generated). |
| **ref_ts** | `date-time` | | |
| **rev_user** | `string` | `null` | |
| **data_prev** | `structure` | | |
| **data_obj** | `structure` | | |
| **data_diff** | `structure` | | |

**Revision methods**

Expand All @@ -286,14 +337,14 @@ It is possible, (typically from the charcoal admin backend), to create *schedule

**Schedule properties**

| Property | Type | Default | Description |
| ------------------ | ------------ | ---------- | ----------- |
| **target_type** | `string` | `null` | The object type of the target object.
| **target_id** | `string` | `null` | The object idenfiier of the target object.
| **scheduled_date** | `date-time` | `null` |
| **data_diff** | `structure` | `[]` |
| **processed** | `boolean` | `false` |
| **processed_date** |
| Property | Type | Default | Description |
|--------------------|-------------|---------|--------------------------------------------|
| **target_type** | `string` | `null` | The object type of the target object. |
| **target_id** | `string` | `null` | The object idenfiier of the target object. |
| **scheduled_date** | `date-time` | `null` | |
| **data_diff** | `structure` | `[]` | |
| **processed** | `boolean` | `false` | |
| **processed_date** | | | |

**Schedule methods (API)**

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2 changes: 1 addition & 1 deletion packages/object/src/Charcoal/Object/RevisionModelConfig.php
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ class RevisionModelConfig extends AbstractConfig
protected array $properties = [];
// Exclude properties from the revision process.
protected array $excludedProperties = [];
// Include properties from the revision process. By default, all properties are included, so this can be used to
// Include properties in the revision process. By default, all properties are included, so this can be used to
// include a property that was excluded by a parent.
protected array $includedProperties = [];

Expand Down

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