gogetter.js

// fs abstraction for sys

function GoGetter() {
  // I'm keeping this here because GoGetter is localized to the environment, mgr is not
  this.interpreterName = 'cuttlefish'
  this.interpreterVersion = 'v0.1'

  this.recursivePathSearch = (root, debug) => {
    return new Promise((resolve, reject) => {
      jQuery.get(`/fileList?path=${root}`, (resp) => {
        //console.log('resp at jq', resp)
        resolve(resp)
      })
    })
  }

  // https://github.com/tc39/proposal-dynamic-import
  this.importSource = (url) => {
    // escape characters that are used to delimit the module URL.
    // this way the following module works: 'data:text/javascript,console.log("hello")'
    url = url.replace(/\\/g, '\\\\').replace(/"/g, '\\"');
    //
    let ogurl = url;
    // try adding this query modifier to convince the browser it's new (if not, cannot refresh source)
    url += `?mtime=${performance.now()}`
    // to try...
    return new Promise((resolve, reject) => {
      import(url).then((obj) => {
        resolve(obj.default)
      }).catch((err) => {
        // at these levels, probably ah syntax error
        if(err.name === "SyntaxError"){
          console.error("Syntax Error at Load")
          console.error("in:", ogurl)
          console.error("at line:", err.lineNumber)
          reject(err)
        } else {
          reject(err)
        }
      })
    })

    // ... previously, this hack... but why?
    /*
    return new Promise((resolve, reject) => {
      const script = document.createElement("script")
      const tempGlobal = "__tempModuleLoadingVariable" + Math.random().toString(32).substring(2
      function cleanup() {
        delete window[tempGlobal]
        script.remove()
      }
      window[tempGlobal] = function(module) {
        cleanup()
        //console.log('ADDHUNK (2) import resolves', url)
        resolve(module[Object.keys(module)[0]])
      }
      script.type = "module"
      script.onerror = () => {
        console.error(`error from imported script...`, err)
        reject(new Error("Failed to load module script with URL " + url))
        cleanup()
      }
      script.textContent = `import * as m from "${url}"; window.${tempGlobal}(m);`
      document.documentElement.appendChild(script)
    })
    */
  }

  this.getJson = (path) => {
    return new Promise((resolve, reject) => {
      console.log('to get', path)
      $.ajax({
        url: path,
        type: 'GET',
        success: (data) => {
          resolve(data)
        },
        error: (err) => {
          reject(new Error("failure at GG ajax get for json object: program probably doesn't exist"))
        }
      })
    })
  }

}

export default GoGetter