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tested ts ijson

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This commit is contained in:
sawka 2024-04-12 12:58:53 -07:00
parent 0fdcd27fee
commit e044487489
1 changed files with 48 additions and 8 deletions
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56
src/util/ijson.ts
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@ -4,6 +4,8 @@
// ijson values are regular JSON values: string, number, boolean, null, object, array
// path is an array of strings and numbers
import * as mobx from "mobx";
type PathType = (string | number)[];
var simplePathStrRe = /^[a-zA-Z_][a-zA-Z0-9_]*$/;
@ -27,6 +29,14 @@ function formatPath(path: PathType): string {
return pathStr;
}
function isArray(obj: any): boolean {
return obj != null && (Array.isArray(obj) || mobx.isObservableArray(obj));
}
function isObject(obj: any): boolean {
return obj != null && obj instanceof Object && !isArray(obj);
}
function getPath(obj: any, path: PathType): any {
let cur = obj;
for (let pathPart of path) {
@ -34,13 +44,13 @@ function getPath(obj: any, path: PathType): any {
return null;
}
if (typeof pathPart === "string") {
if (cur instanceof Object) {
if (isObject(cur)) {
cur = cur[pathPart];
} else {
return null;
}
} else if (typeof pathPart === "number") {
if (Array.isArray(cur)) {
if (isArray(cur)) {
cur = cur[pathPart];
} else {
return null;
@ -55,8 +65,23 @@ function getPath(obj: any, path: PathType): any {
type SetPathOpts = {
force?: boolean;
remove?: boolean;
combinefn?: (oldVal: any, newVal: any, opts: SetPathOpts) => any;
};
function combineFn_arrayAppend(oldVal: any, newVal: any, opts: SetPathOpts): any {
if (oldVal == null) {
return [newVal];
}
if (!isArray(oldVal) && !opts.force) {
throw new Error("Cannot append to non-array: " + oldVal);
}
if (!isArray(oldVal)) {
return [newVal];
}
oldVal.push(newVal);
return oldVal;
}
function setPath(obj: any, path: PathType, value: any, opts: SetPathOpts) {
if (opts == null) {
opts = {};
@ -64,14 +89,17 @@ function setPath(obj: any, path: PathType, value: any, opts: SetPathOpts) {
if (opts.remove && value != null) {
throw new Error("Cannot set value and remove at the same time");
}
setPathInternal(obj, path, value, opts);
return setPathInternal(obj, path, value, opts);
}
function isEmpty(obj: any): boolean {
if (obj == null) {
return true;
}
if (obj instanceof Object) {
if (isArray(obj)) {
return obj.length == 0;
}
if (isObject(obj)) {
for (let key in obj) {
return false;
}
@ -81,11 +109,15 @@ function isEmpty(obj: any): boolean {
}
function removeFromArr(arr: any[], idx: number): any[] {
console.log("removefromarray", arr, idx);
if (idx >= arr.length) {
return arr;
}
if (idx == arr.length - 1) {
arr.pop();
if (arr.length == 0) {
return null;
}
return arr;
}
arr[idx] = null;
@ -94,6 +126,9 @@ function removeFromArr(arr: any[], idx: number): any[] {
function setPathInternal(obj: any, path: PathType, value: any, opts: SetPathOpts): any {
if (path.length == 0) {
if (opts.combinefn != null) {
return opts.combinefn(obj, value, opts);
}
return value;
}
const pathPart = path[0];
@ -104,7 +139,7 @@ function setPathInternal(obj: any, path: PathType, value: any, opts: SetPathOpts
}
obj = {};
}
if (!(obj instanceof Object)) {
if (!isObject(obj)) {
if (opts.force) {
obj = {};
} else {
@ -118,7 +153,7 @@ function setPathInternal(obj: any, path: PathType, value: any, opts: SetPathOpts
}
return obj;
}
const newVal = setPath(obj[pathPart], path.slice(1), value, opts);
const newVal = setPathInternal(obj[pathPart], path.slice(1), value, opts);
if (opts.remove && newVal == null) {
delete obj[pathPart];
if (isEmpty(obj)) {
@ -127,6 +162,7 @@ function setPathInternal(obj: any, path: PathType, value: any, opts: SetPathOpts
return obj;
}
obj[pathPart] = newVal;
return obj;
} else if (typeof pathPart === "number") {
if (pathPart < 0 || !Number.isInteger(pathPart)) {
throw new Error("Invalid path part: " + pathPart);
@ -137,7 +173,7 @@ function setPathInternal(obj: any, path: PathType, value: any, opts: SetPathOpts
}
obj = [];
}
if (!Array.isArray(obj)) {
if (!isArray(obj)) {
if (opts.force) {
obj = [];
} else {
@ -147,12 +183,16 @@ function setPathInternal(obj: any, path: PathType, value: any, opts: SetPathOpts
if (opts.remove && path.length == 1) {
return removeFromArr(obj, pathPart);
}
const newVal = setPath(obj[pathPart], path.slice(1), value, opts);
const newVal = setPathInternal(obj[pathPart], path.slice(1), value, opts);
if (opts.remove && newVal == null) {
return removeFromArr(obj, pathPart);
}
obj[pathPart] = newVal;
return obj;
} else {
throw new Error("Invalid path part: " + pathPart);
}
}
export type { PathType, SetPathOpts };
export { getPath, setPath, combineFn_arrayAppend };