Support JSON1

[curran]

What would it take to make this library work with json1?

Initial exploration reveals these places might need to be changed:

• sharedb-string-binding/index.js

  Line 50 in 0837ba0

  StringBinding.prototype._onOp = function(op, source) {

• sharedb-string-binding/index.js

  Line 65 in 0837ba0

  StringBinding.prototype._parseInsertOp = function(component) {

• sharedb-string-binding/index.js

  Line 72 in 0837ba0

  StringBinding.prototype._parseRemoveOp = function(component) {

• sharedb-string-binding/index.js

  Line 79 in 0837ba0

  StringBinding.prototype._parseParentOp = function() {

• sharedb-string-binding/index.js

  Line 98 in 0837ba0

  StringBinding.prototype._remove = function(index, text) {

• sharedb-string-binding/test/index.js

  Line 38 in 0837ba0

  this.doc.submitOp({p: ['name'], oi: 'Fido'});

• sharedb-string-binding/test/index.js

  Line 51 in 0837ba0

  this.doc.submitOp({p: ['name'], oi: 'Fido'});

• sharedb-string-binding/test/index.js

  Line 59 in 0837ba0

  this.doc.submitOp({p: ['name'], oi: 'Spot'});

[highsea]

Need to pay attention to modification:

// This package also needs modification : https://github.com/ottypes/json0-to-1/issues/2
const json0to1 = require('ot-json0-to-1');
const json1 = require('ot-json1');
...
...
StringBinding.prototype._onOp = function (op, source) { 
  if (source === this) return;
  if (op.length === 0) return;
  json1.type.apply(json1.type.create(this.doc.data), op);
  this._parseParentOp();
};

StringBinding.prototype._insert = function (index, text) {
  var path = this.path.concat(index);
  var op = { p: path, si: text };
  const json1op = json0to1([op]); // Change ot command
  this.doc.submitOp(json1op, { source: this });
};

...

StringBinding.prototype._remove = function (index, text) { 
  var path = this.path.concat(index);
  var op = { p: path, sd: text };
  const json1op = json0to1([op]);
  this.doc.submitOp(json1op, { source: this });
};