JavaScripting InDesign  

function placeSnipInline( mySnipFile, text ) {
var myDoc = app.documents.add(false);
app.scriptPreferences.userInteractionLevel = UserInteractionLevels.neverInteract;
myDoc.pages[0].place(mySnipFile);
app.scriptPreferences.userInteractionLevel = UserInteractionLevels.interactWithAll;
myLib = app.libraries.add(File("~/Desktop/templib.indl"));
myLib.store(myDoc.pageItems[0]);
myDoc.close(SaveOptions.no);
myLib.assets[0].placeAsset(text);
myLib.close();
File("~/Desktop/templib.indl").remove();
}

//DESCRIPTION: Place Snippet Inline/Anchored

if (app.documents.length > 0 &&
      app.selection.length > 0 &&
      app.selection[0].hasOwnProperty("baseline")) {
placeSnippet(app.selection[0]);
} else {
alert("There must be a text selection to run this script");
}

function placeSnippet(sel) {
if (File.fs == "Windows") {
  var Filter = "Snippet files: *.inds";
} else {
  var xmlFilter = function(file) {
    while(file.alias){
      file = file.resolve();
      if (file == null) return false;
    }
    if (file instanceof Folder) return true;
    return (file.name.slice(file.name.lastIndexOf(".")).toLowerCase() == ".inds");
  }
  var Filter = xmlFilter
}
var myFile = File.openDialog("Choose a snippet file", Filter);
if (myFile == null) { return }
placeSnipInline(myFile, app.selection[0]);
}