# EFTL Language Extension for VS Code

Syntax highlighting and language support for **EFTL (ElixForms Template Language)**.

## Features

- **Syntax Highlighting** for all EFTL constructs
- **Code Snippets** for common patterns
- **Bracket Matching** for EFTL blocks
- **Code Folding** for block structures

## Supported Syntax

### Block Delimiters
- `[EFTL]...[/EFTL]` - Main EFTL block
- `[VAR name="..." type="..."]...[/VAR]` - Variable declarations
- `[IF]...[/IF]` - Conditionals
- `[WHILE]...[/WHILE]` - Loops

### Expressions
- `[% expression %]` - Execute expression
- `[%= expression %]` - Output expression value

### Data Tags
- `[TAG]GETVALUEBYTAG,TAG_NAME,REQUEST,IUQOID[/TAG]`
- `[TAG]SCHEMAID,schemaId,COL0001,IUQOID, , [/TAG]`

### Functions
- `[SPLIT regex="..."]...[/SPLIT]` - Split string
- `[TRIM]...[/TRIM]` - Trim whitespace
- `[VALUE_OF varname="..." index="..." /]` - Get array element
- `[SIZE_OF varname="..." /]` - Get array size
- `[CONTAINS varname="..."]...[/CONTAINS]` - Check containment
- `[FORMAT type="..." pattern="..."]...[/FORMAT]` - Format values

### Control Structures
- `[IF]`, `[CONDITION]`, `[THEN]`, `[ELSE]`, `[ELSE IF]`
- `[WHILE]`, `[DO]`

### Comments
- `[!-- comment --]`

## Installation

### From VSIX (Local)

1. Package the extension: `npx vsce package`
2. Install in VS Code: `code --install-extension eftl-language-0.1.0.vsix`

### Development Mode

1. Open this folder in VS Code
2. Press `F5` to launch Extension Development Host
3. Open any `.eftl` file to see syntax highlighting

## Snippets

| Prefix | Description |
|--------|-------------|
| `eftl` | EFTL block with header |
| `var` | Variable declaration |
| `vartag` | Variable from TAG |
| `varschema` | Variable from SCHEMAID |
| `if` | IF statement |
| `ifelse` | IF-ELSE statement |
| `while` | WHILE loop |
| `split` | Split function |
| `trim` | Trim function |
| `valueof` | VALUE_OF function |
| `sizeof` | SIZE_OF function |
| `contains` | CONTAINS function |
| `formatnum` | Format number |
| `tag` | GETVALUEBYTAG tag |
| `schema` | SCHEMAID tag |
| `out` | Output expression |
| `comment` | Comment block |

## Example

```eftl
[EFTL][HEADER name="trimDocument" value="true" type="boolean" /]
[VAR name="total" type="number"][% total = 0; %][/VAR]
[VAR name="items" type="iterable"][SPLIT regex=";"][TAG]GETVALUEBYTAG,ITEMS,REQUEST,IUQOID[/TAG][/SPLIT][/VAR]

[!-- Calculate total --]
[VAR name="count" type="number"][SIZE_OF varname="items" /][/VAR]

[IF]
    [CONDITION][% count > 0 %][/CONDITION]
    [THEN][%= count %] items found[/THEN]
    [ELSE]No items[/ELSE]
[/IF]
[/EFTL]
```

## License

MIT