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Metatron library: Implementation in Rust of a report generation

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# Metatron

![Metatron](https://github.com/igumnoff/metatron/raw/HEAD/logo.png)

**Metatron library: Implementation in Rust of a report generation based on [Shiva library](https://github.com/igumnoff/shiva)**

## Supported report types

- Plain text
- Markdown
- HTML
- PDF

# Usage

Cargo.toml
```toml
[dependencies]
metatron = "1.1.1"
```

```rust
fn main() {
    let template = std::fs::read_to_string("report-template.kdl").unwrap();
    let data = std::fs::read_to_string("report-data.json").unwrap();
    let images = HashMap::new();
    let result = Report::generate(&template, &data, &images, "pdf").unwrap();
    std::fs::write("report.pdf",result).unwrap();
}
```

## How it works

### report-template.kdl
```kdl
template {
    title {
        image src="data/logo.png" width=100 height=100
        header level=1 "$P{company_name} Employee Report"
    }
    page_header {
        text size=7 "Confidential information"
    }
    column_header {
        column name="Name" width=30
        column name="Age" width=10
        column name="Salary" width=20
    }
    row {
        value "$F(name)"
        value "$F(age)"
        value "$F(salary)"
    }
    column_footer {
        value "Average:"
        value "$P{average_age}"
        value "$P{average_salary}"
    }
    page_footer {
        text size=7 "Tel: +1 123 456 789"
    }
    summary {
        paragraph {
            text size=10 "Company address: $P{company_address}"
        }
    }
}
```

### report-data.json
```json
{
   "rows": [
     {
       "name": "John",
       "age": 25,
       "salary": 50000
     },
     {
       "name": "Jane",
       "age": 30,
       "salary": 60000
     },
     {
       "name": "Jim",
       "age": 35,
       "salary": 70000
     }
   ],
   "params": {
     "company_name": "ABCDFG Ltd",
     "company_address": "1234 Elm St, Springfield, IL 62701",
     "average_age": 30,
     "average_salary": 60000
   }
}

```

### Generated report

![PDF](https://github.com/igumnoff/metatron/raw/HEAD/pdf.png)

## Contributing
I would love to see contributions from the community. If you experience bugs, feel free to open an issue. If you would like to implement a new feature or bug fix, please follow the steps:
1. Read "[Contributor License Agreement (CLA)](https://github.com/igumnoff/metatron/blob/main/CLA)"
2. Contact with me via telegram @ievkz or discord @igumnovnsk
3. Confirm e-mail invitation in repository
4. Do "git clone"
5. Create branch with your assigned issue
6. Create pull request to main branch

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