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42 lines
1.4 KiB
Markdown
42 lines
1.4 KiB
Markdown
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# VAT Transformation Service
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The VAT Transformation Service adds VAT (Value-Added Tax) to a given input amount.
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The input string must be either an ISO 3166 alpha-2 country code or a percentage, i.e. numerical format.
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## Examples
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### Display
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```java
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Number CurrentSpotPrice "Current Spot Price incl. VAT [VAT(12.5):%s]" <price>
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```
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### In a Rule
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Add Danish VAT to price:
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```java
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var Number price = 499
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logInfo("Price", "Price incl. VAT: " + transform("VAT", "DK", price.toString))
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```
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## Usage as a Profile
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The functionality of this `TransformationService` can also be used in a `Profile` on an `ItemChannelLink`.
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This is the most powerful usage since VAT will be added without providing any explicit country code, percentage or configuration.
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To use this, an `.items` file can be configured as follows:
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```java
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Number CurrentSpotPrice "Current Spot Price" <price> { channel="<channelUID>" [profile="transform:VAT"] }
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```
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To override VAT percentage for configured system country:
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```java
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Number CurrentSpotPrice "Current Spot Price" <price> { channel="<channelUID>" [profile="transform:VAT", percentage="12.5"] }
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```
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If VAT is not known for the configured country or the provided percentage is invalid, the default is 0%, so the input value will be put into the transformation without any changes.
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Please note: This profile is a one-way transformation, i.e. only values from a device towards the item are changed, the other direction is left untouched.
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