## Entity tutorial

## 1) Entity

Entity api can be accessed like WebAPI.
```javascript
//app.js
var CRMSDK = window.CRMSDK;
var WebAPI = CRMSDK.WebAPI;
var Entity = CRMSDK.Entity;
```

```javascript
import {Entity} from "crm-sdk";
```

```javascript
var CRMSDK = require("crm-sdk"); //umd
var Entity = CRMSDK.Entity;
``` 

## 2) Entity

## 2.1) Entity.get
Entity.get has three arguments:
  * logicalName
  * id
  * query (see odata chapter)

```javascript
Entity.get(logicalName, id, query).then(function (account) {
    console.log(account.accountid);
});
```  

### 2.1.1) Entity.get using id
```javascript
Entity.get("account", "475b158c-541c-e511-80d3-3863bb347ba8").then(function (account) {
    if (account) {
        console.log("Entity.get 'acount' by id " + account.emailaddress1);
    }
});
````

### 2.1.2) Entity.get using direct filters
```javascript
Entity.get("account", null, {
    emailaddress1: "Oeha@Dys.nl",
    statecode: 0
}).then(function (account) {
    if (account) {
        console.log("Entity.get 'acount' " + account.emailaddress1);
    }
});
```

### 2.1.3) Entity.get using filters definition
Result is exactly as example above, but operators can be different.
Filter type can be "and" or "or".
```javascript
Entity.get("account", null, {
    filters: [/*see odata chapter*/]
}).then(function (account) {
    if (account) {
        console.log("Entity.get 'acount' " + account.emailaddress1);
    }
});
```

## 2.2) Entity.query
Entity.query has two arguments:
  * logicalName
  * query (see odata chapter)

```javascript
Entity.query(logicalName, query).then(function (accounts) {
    //logic here
});
```

### 2.2.1) Entity.query using direct filters
```javascript
Entity.query("account", {
    emailaddress1: "test@dys.nl",
    statecode: 0
}).then(function (accounts) {
    accounts.forEach(function (account, index) {
        console.log("Entity.query 'account' " + account.emailaddress1 + " at " + index);
    });
});
```

### 2.2.2) Entity.query using filters definition
```javascript
Entity.query("account", {
    filters: [{
        type: "and",
        conditions: [{
            attribute: "emailaddress1",
            operator: "eq",
            value: "test@dys.nl"
        }, {
            attribute: "statecode",
            operator: "eq",
            value: 0
        }]
    }]
}).then(function (accounts) {
    accounts.forEach(function (account, index) {
        console.log("Entity.query 'account' " + account.emailaddress1 + " at " + index);
    });
});
```

## 2.3) Create
Entity.create has two arguments:
  * logicalName
  * data

```javascript
Entity.create(logicalName, data).then(function (account) {
    //logic here
});
```

### 2.3.1) Create example
```javascript
Entity.create("account", {
    paymenttermscode: 4,
    statecode: 0,
    emailaddress1: "created@dys.nl"
}).then(function (account) {
    console.log("entity.create 'acount' " + account.emailaddress1);
});
```

## 2.4) Entity.fetch
Entity.fetch has three arguments:
  * logicalName
  * fetchXml
  
```javascript
Entity.fetch(logicalName, fetchXml).then(function (entities) {
    //logic here
});
```

## 2.5) Entity.savedQuery
```text
Enterprise version only
```
Entity.savedQuery has two arguments:
  * logicalName
  * queryName
  
```javascript
Entity.savedQuery(logicalName, queryName).then(entities => {
    //logic here
});
```

```javascript
Entity.savedQuery("account", "Active Accounts").then(accounts => {
    //logic here
});
```

## 2.6) Entity.userQuery
```text
Enterprise version only
```
Entity.userQuery has two arguments:
  * logicalName
  * queryName
  
```javascript
Entity.userQuery(logicalName, queryName).then(entities => {
    //logic here
});
```

```javascript
Entity.userQuery("account", "HelloWorld").then(accounts => {
    //logic here
});
```

## 2.7) Entity.count
Entity.count count has one argument:
  * logicalName
  
```javascript
Entity.count(logicalName).then(function (nrOfEntities) {
    //logic here
});
```

## 2.8) Bind
For expanded(Lookup) Attributes it's not possible to assign a new value like on normal Attributes.
A bind is the equivalent for this. Be aware that unbinding is not implemented yet, so
removing a binding is not possible.
When there are multiple targets, the third argument of the bind method is the target.
```javascript
Entity.get("account", null, {
    emailaddress1: "Oeha@Dys.nl",
    statecode: 0,
    select: ["accountid", "name", "emailaddress1"],
    expand: [{
        attribute: "primarycontactid",
        select: ["contactid", "fullname"]
    }]
}).then(function (account) {
    if (account) {
        console.log("Entity.get 'acount' " + account.emailaddress1);
        console.log("Entity.get 'acount' " + account.primarycontactid.contactid);
        account.bind("primarycontactid", "67a6e5b9-88df-e311-b8e5-6c3be5a8b200").then(function () {
            console.log("Entity.get 'acount' " + account.primarycontactid.contactid);
        });
    }
});
```

## 2.9) Save
Saving the entity can be done by invoking the save method.
```javascript
Entity.get("account", {
    emailaddress1: "test@dys.nl",
    statecode: 0
}).then(function (account) {
    if (account) {
        console.log("entity.save 'acount' " + account.emailaddress1);
        account.emailaddress1 = "changed@dys.nl";
        account.save().then(function () {
            console.log("entity.save 'acount' " + account.emailaddress1);
        });
    }
});
```

## 2.10) Delete
Deleting an entity can be done by invoking the delete method.
```javascript
Entity.get("account", {
    emailaddress1: "test@dys.nl",
    statecode: 0
}).then(function (account) {
    if (account) {
        console.log("entity.save 'acount' " + account.emailaddress1);
        account.emailaddress1 = "changed@dys.nl";
        account.delete().then(function () {
            console.log("entity.delete 'acount' " + account.emailaddress1);
        });
    }
});
```

## 2.11) Entity.instantiate
Entity.instantiate has two arguments:
  * data
  * logicalName
 
It will instantiate the Entity local.

### 2.11.1) Instantiate example
```javascript
Entity.instantiate({
    paymenttermscode: 4,
    statecode: 0,
    emailaddress1: "instantiate@dys.nl"
}, "account").then(function (account) {
    console.log("entity.instantiate 'acount' " + account.emailaddress1);
    account.save(); // create the account in CRM.
});
```

# 3) OData
The query arguments contain OData elements in json format.

## 3.1) $select
The 'select' is an array of attributes of the entity.
If no 'select' is specified, all Attributes of the logicalName will be selected. This may cause performance issues. 

```javascript
Entity.query("account", {
    select: ["accountid"]
}).then(function (data) {
    console.log(data.value[0].accountid);
});
```

When adding a Lookup in the select, the value will be an Object having LogicalName, Name, Id.
Normally odata skips Lookup attributes in the select, but the WebAPI.js will resolve to LogicalName, Id, Name.
```javascript
Entity.get("systemuser", id, {
    select: ["systemuserid", "businessunitid"]
}).then(function (systemuser) {
    if (systemuser) {
        console.log("Entity.get 'systemuser' " + systemuser.systemuserid);
        console.log("Entity.get 'systemuser.businessunitid.LogicalName' " + systemuser.businessunitid.LogicalName);
        console.log("Entity.get 'systemuser.businessunitid.Id' " + systemuser.businessunitid.Id);
        console.log("Entity.get 'systemuser.businessunitid.Name' " + systemuser.businessunitid.Name);
    }
});
```

## 3.2) $expand
The 'expand' is an array of Lookup attributes having a nested select.
A nested expand is not possible due to restrictions on CRM side.
```javascript
Entity.query("account", {
    select: ["accountid"],
    expand: [{
        attribute: "businessunitid",
        select: ["name"]
    }]
}).then(function (data) {
    console.log(data.value[0].businessunitid.name);
});
```

When an expand has no 'select', all attributes will be taken.
```javascript
//The primarycontactid will be expanded by all Contact Attributes.
Entity.get("account", null, {
    emailaddress1: "Oeha@Dys.nl",
    statecode: 0,
    select: ["accountid", "name", "emailaddress1"],
    expand: ["primarycontactid"]
}).then(function (account) {
    if (account) {
        console.log("Entity.get 'acount' " + account.emailaddress1);
        console.log("Entity.get 'acount' " + account.primarycontactid.fullname);
    }
});
```

## 3.3) $orderby
The 'orders' is an array of configurations of attribute and descending boolean.
```javascript
entity.query("account", {
    select: ["accountid"],
    orders: [{
        attribute: "accountid",
        descending: true
    }]
}).then(function (data) {
    console.log(data.value[0].accountid);
});
```

## 3.4) $filter
The 'filters' is an array of configurations of filter type and conditions.
Filters can also be nested to support 'grouping'.
See https://msdn.microsoft.com/en-us/library/gg334767.aspx#bkmk_filter for possible operator values.
    
```javascript
entity.query("account", {
    select: ["accountid"],
    filters: [{
        type: "or",
        conditions: [{
            attribute: "paymenttermscode",
            operator: "eq",
            value: 4
        }, {
            attribute: "industrycode",
            value: 8
        }],
        filters: [{
            type: "and",
            conditions: [{
                attribute: "statecode",
                value: 0
            }]
        }]
    }]
}).then(function (data) {
    console.log(data.value[0].accountid);
});
```

Instead of 'filters' it's also possible to use direct-filters, which are always 'and' conditions using 'eq' condition:

```javascript
entity.query("account", {
    paymenttermscode: 4,
    statecode: 0,
    select: ["accountid"]
}).then(function (data) {
    console.log(data.value[0].accountid);
});
```

## 3.5) Orders
Ordering is supported via orders attribute. Each order config has 'attribute' and 'descending'.
To order Attributes, please use the 'expand'. This is equal to the web-API $orderby.
```javascript
Entity.query("account", {
    emailaddress1: "Oeha@Dys.nl",
    statecode: 0,
    select: ["accountid", "name", "emailaddress1"],
    orders: [{
        attribute: "accountid",
        descending: true
    }]
}).then(function (account) {
    if (account) {
        console.log("Entity.get 'acount' " + account.emailaddress1);
    }
});
```

## 3.6) maxpagesize
This will add the odata.maxpagesize=x as header in the request.
```javascript
Entity.query("account", {
    maxpagesize: 3
}).then(function (accounts) {});
```

## 3.7) top
This will add $top in the request.
```javascript
Entity.query("account", {
    top: 3
}).then(function (accounts) {});
```

# 4) Account
Account is a sub-class of Entity. It can be included in your application the same way.
The Account will ease programming.

## 4.1) Definition
Instead of
```javascript
Entity.query("account", query).then(function (accounts) {});
Entity.get("account", id, query).then(function (account) {});
```

the following can be used:
```javascript
Account.query(query).then(function (accounts) {});
Account.get(id, query).then(function (account) {});
```

## 4.2) Active accounts
The Account has a getter for the activeFilter and a method to get active accounts.
The method is the easiest one, but also good to know that there is a filter.

The Account activeFilter:
```javascript
Account.query({
    filters: [Account.activeFilter],
    select: ["accountid", "emailaddress1"]
}).then(function (accounts) {});
```

The Account getActiveAccounts method:
```javascript
Account.getActiveAccounts({
    select: ["accountid", "emailaddress1"]
}).then(function (accounts) {
    accounts.forEach(function (account, index) {
        console.log("Entity.query 'account' " + account.emailaddress1 + " at " + index);
    });
});
```

# 5) Systemuser
Systemuser is a sub-class of Entity. It can be included in your application the same way.
The Systemuser will ease programming.

## 5.1) userId
The Systemuser has a getter for the userId.

Instead of
```javascript
var userId = window.Xrm.Page.context.getUserId(),
    trimmedId = userId.slice(1, userId.length - 1); //No curly-braces
Systemuser.get(null, {
    systemuserid: trimmedId,
    select: ["systemuserid"]
}).then(function (systemuser) {
    console.log("Systemuser.get current 'systemuser' " + systemuser.systemuserid);
});
```

the following can be used:
```javascript
Systemuser.get(null, {
    systemuserid: Systemuser.userId, //No curly-braces
    select: ["systemuserid"]
}).then(function (systemuser) {
    console.log("Entity.get current 'systemuser' " + systemuser.systemuserid);
});
```

## 5.2) Current Systemuser
The Systemuser has a getter for the currentFilter and a method to get the current systemuser.
The method is the easiest one, but also good to know that there is a filter.

The Systemuser currentFilter:
```javascript
Systemuser.get(null, {
    filters: [Systemuser.currentFilter],
    select: ["systemuserid"]
}).then(function (systemuser) {
    console.log("Entity.get current 'systemuser' " + systemuser.systemuserid);
});
```

The Systemuser getCurrent method:
```javascript
Systemuser.getCurrent({
    select: ["systemuserid"]
}).then(function (systemuser) {
    console.log("Entity.get 'systemuser' " + systemuser.systemuserid);
});
```

# 6) Annotation
Annotation is a sub-class of Entity. It can be included in your application the same way.
The Annotation will ease programming.

## 6.1) parseFile
```javascript
Annotation.parseFile(annotation).then(function (file) {});
```

## 6.2) parseAnnotation
```javascript
var id = window.Xrm.Page.data.getEntity().getId();
var logicalName = window.Xrm.Page.data.getEntity().getEntityName();
Annotation.parseAnnotation(file, id, logicalName).then(function (annotation) {
    annotation.save().then(function () {});
});
```

# 7) Webresource
Webresource is a sub-class of Entity. It can be included in your application the same way.
The Webresource will make it easy to modify webresources.
Publishing is included in the save (save === upload + publish).

```javascript
import {Webresource} from "crm-sdk";

// update example
let webresource = Webresource.get(null, {
    name: webresourceName,
    select: ["name", "webresourcetype"]
}).then(function (webresource) {
    webresource.content = "<base64 string here>";
    webresource.save().then(function () {
        // saved and published
    });
});

// insert example
webresource = new Webresource({
    content: "<base64 string here>",
    name: "<filename>",
    displayname: "<displayname>"
});
webresource.solutionUniqueName = "<solution name>"; // otherwise "Active" solution will be taken
webresource.save().then(function () {
    // saved and published
});
```