memegen/main.js

Making drake meme image.

#!/usr/bin/env node
const sharp = require('sharp');
const chalk = require('chalk');
const program = require('commander');
const jsfs = require('jsonfile');
const fsx = require('fs-extra')
const fs = require('fs');
const path = require('path');

let dep = fs.readFileSync(path.join(__dirname,'package.json'),'utf-8');
let depobj = JSON.parse(dep);
// Build CLI
program
  .version(chalk.green(depobj.version))
  .description('A meme generator.')
  .option('-1, --first [name]', 'Specify first input image(upper one)')
  .option('-2, --second [name]', 'Specify second input image(lower one)')
  .option('-c, --config [name]', 'Specify configure file for usage',undefined)
  .option('-o, --output [loc]', 'Specify output location',__dirname)
  .option('-f, --fname [name]', 'Specify output filename','output')
  .option('-t, --type [type]', 'Specify output file type','png')
  .parse(process.argv);

if(program.config != undefined){
  // use configuration files
  let jsobj = jsfs.readFileSync(program.config,'utf-8');
  // 
  generate_meme_advanced(jsobj);
}
else{
  // use drake as template
  // Testing all file is legal
  fsx.pathExists(program.first, (err,exists) => {
    if(exists==false){
      console.error(`${program.first} is not existed!`);
      process.exit();
    }
    else{
      console.log(`Upper image: ${program.first}`);
      // Checking second 
      fsx.pathExists(program.second, (err,exists) => {
        if(exists==false){
          console.error(`${program.second} is not existed!`);
          process.exit();
        }
        else{
          console.log(`Lower image: ${program.second}`);
        }
      })
      // calling generating function
      generate_meme(program.first,program.second,program.output);
    }
  });
}


// Generate meme!
function generate_meme(src1,src2,out){
  sharp(src1)
    .resize(300,260)
    .max()
    .toBuffer(function(err,out1){
      // Resizing second
      sharp(src2)
        .resize(300,260)
        .max()
        .toBuffer(function(err,out2){
          // concat 
          sharp('lib/drake_meme_template.jpg')
            .overlayWith(out1, { top:0 , left: 322 } )
            .toBuffer(function(err,result1) {
              sharp(result1)
                .overlayWith(out2, { top:265, left: 322 } )
                .toFile(path.join(program.output,program.fname+"."+program.type), function(err) {
                });
            });
          
        })
    })
}

function generate_meme_advanced(configobj){
  let count=0;
  configobj.input.forEach(obj => {
    //console.log(obj)
    //console.log(configobj.bg)
    sharp(obj.src)
      .resize(obj.size.w,obj.size.h)
      .max()
      .toBuffer(function(err,out1){
        // overlaywith process
        console.log(count);
        if(count==0){
          sharp(configobj.bg.src)
            .overlayWith(out1, { top:obj.loc.top , left: obj.loc.left } )
            .toFile('/tmp/test.png', function(err) {
            });
        }
        else{
          setTimeout(function(){
            sharp('/tmp/test.png')
              .overlayWith(out1, { top:obj.loc.top , left: obj.loc.left } )
              .toFile(path.join(program.output,program.fname+"."+program.type), function(err) {
              });
          },100)
        }
        count++;
    })
  })
}