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Improvements and basic tests for Magic op and addition of deep cloning for dishes

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This commit is contained in:
n1474335 2018-08-09 19:17:24 +01:00
parent 2b6c280858
commit 9b7f4e824a
10 changed files with 197 additions and 18 deletions
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63
src/core/Dish.mjs
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@ -300,6 +300,69 @@ class Dish {
}
}
/**
* Returns a deep clone of the current Dish.
*
* @returns {Dish}
*/
clone() {
const newDish = new Dish();
switch (this.type) {
case Dish.STRING:
case Dish.HTML:
case Dish.NUMBER:
case Dish.BIG_NUMBER:
// These data types are immutable so it is acceptable to copy them by reference
newDish.set(
this.value,
this.type
);
break;
case Dish.BYTE_ARRAY:
case Dish.JSON:
// These data types are mutable so they need to be copied by value
newDish.set(
JSON.parse(JSON.stringify(this.value)),
this.type
);
break;
case Dish.ARRAY_BUFFER:
// Slicing an ArrayBuffer returns a new ArrayBuffer with a copy its contents
newDish.set(
this.value.slice(0),
this.type
);
break;
case Dish.FILE:
// A new file can be created by copying over all the values from the original
newDish.set(
new File([this.value], this.value.name, {
"type": this.value.type,
"lastModified": this.value.lastModified
}),
this.type
);
break;
case Dish.LIST_FILE:
newDish.set(
this.value.map(f =>
new File([f], f.name, {
"type": f.type,
"lastModified": f.lastModified
})
),
this.type
);
break;
default:
throw new Error("Cannot clone Dish, unknown type");
}
return newDish;
}
}