universis-templates

Universis Api Server extension for managing report templates. @universis/templates uses @themost/web Angular JS for server applications template to render documents and reports.

The following code snippet uses a simple template to render a document based on the data specified.

    // get template service
    const templateService = context.getApplication().getService(DocumentTemplateService);
    // get template path
    const templatePath = path.resolve(__dirname, 'files/HelloTemplate.docx');
    // render template
    const buffer = await templateService.render(context, templatePath, {
        department: {
            name: 'Computer Science',
            organization: {
                name: 'Educational Institute'
            }
        },
        message: 'Hello World'
    });
    // save file
    const outFile = path.resolve(__dirname, '.tmp/HelloTemplate.docx');
    await new Promise((resolve, reject) => {
        fs.writeFile(outFile, buffer, (err)=> {
           if (err) {
               return reject(err);
           }
           return resolve();
        });
    });

The result will be a document like this:

Export document

Use @universis/converter#DocumentConverterService to convert a document to pdf.

// get template service
const templateService = context.getApplication().getService(DocumentTemplateService);
/**
 * get DocumentConverterService service
 * @type {DocumentConverterService}
 */
const converterService = context.getApplication().getService(DocumentConverterService);
// get template path
const templatePath = path.resolve(__dirname, 'files/HelloTemplate.docx');
// render template
const buffer = await templateService.render(context, templatePath, {
    department: {
        name: 'Computer Science',
        organization: {
            name: 'Educational Institute'
        }
    },
    message: 'Hello World'
});
// save file
const docFile = path.resolve(__dirname, '.tmp/HelloTemplate.docx');
await new Promise((resolve, reject) => {
    fs.writeFile(docFile, buffer, (err)=> {
        if (err) {
            return reject(err);
        }
        converterService.convertFile(docFile, docFile.replace(/.docx$/ig, '.pdf')).then(()=> {
            return resolve();
        }).catch( err => {
            return reject(err);
        });

    });
});

and the result will be a pdf document:

Usage

Install @universis/templates and @universis/converter modules

npm i @universis/templates @universis/converter

Install LibreOffice or use docker engine to install it as docker container. LibreOffice - a powerful open source office suite- and its tools are used by DocumentConverterService in order to convert docx to pdf documents.

add DocumentTemplateService to @universis/api services section of application configuration:

# server/config/app.json

{
    "services": [
        ...
        { "serviceType": "@universis/templates#DocumentTemplateService" }
    ]
...
}

add DocumentTemplateLoader to @universis/api services section of application configuration:

# server/config/app.json

{
    "services": [
        ...
        { "serviceType": "@universis/templates#DocumentTemplateLoader" }
    ]
...
}

Use Google Drive REST API

If your intended to use GoogleDriveTemplateLoader to load templates using Google Drive REST API, register GoogleDriveTemplateLoader:

# server/config/app.json
    
    {
        "services": [
            ...
            { 
                "stategyType": "@universis/templates#DocumentTemplateLoader",
                "serviceType": "@universis/templates#GoogleDriveTemplateLoader"
            }
        ]
    ...
    }
    

Follow OAuth 2.0 for Server to Server Applications instructions for generating a service account for google drive api and set account credentials to application configuration:

"settings": {
...
    "universis": {
            "converter": {
                "command": "libreoffice"
            },
            "templates": {
                "drive": {
                    "credentials": {
                        "type": "service_account",
                        "project_id": "project",
                        "private_key_id": "...",
                        "private_key": "...",
                        "client_email": "...",
                        "client_id": "...",
                        "auth_uri": "https://accounts.google.com/o/oauth2/auth",
                        "token_uri": "https://oauth2.googleapis.com/token",
                        "auth_provider_x509_cert_url": "...",
                        "client_x509_cert_url": "..."
                    }
                }
            }
        }
    }
 ...

and render documents downloaded from google drive:

// get template service
const templateService = context.getApplication().getService(DocumentTemplateService);
/**
 * get DocumentConverterService service
 * @type {DocumentConverterService}
 */
const converterService = context.getApplication().getService(DocumentConverterService);
// get google drive document by name
const templatePath = 'HelloTemplate.docx';
// render template
const buffer = await templateService.render(context, templatePath, {
    department: {
        name: 'Computer Science',
        organization: {
            name: 'Educational Institute'
        }
    },
    message: 'Hello World'
});
// save file
const docFile = path.resolve(__dirname, '.tmp/HelloTemplate.docx');
await new Promise((resolve, reject) => {
    fs.writeFile(docFile, buffer, (err)=> {
        if (err) {
            return reject(err);
        }
        converterService.convertFile(docFile, docFile.replace(/.docx$/ig, '.pdf')).then(()=> {
            return resolve();
        }).catch( err => {
            return reject(err);
        });

    });
});

Use document converter

Finally add DocumentConverterService to @universis/api services section of application configuration:

# server/config/app.json

{
    "services": [
        ...
        { "serviceType": "@universis/converter#DocumentConverterService" }
    ]
...
}

and start using document templates for creating Universis reports.