app-state-utils
Version:
A set of utilities for state management in web apps, integrates well with front-end state management libraries like redux and vuex, and can be used on server side as well. It defines methods for mutating keys and values in a conventional javascript object
130 lines (112 loc) • 21.4 kB
JavaScript
;var _interopRequireDefault=require("@babel/runtime/helpers/interopRequireDefault");Object.defineProperty(exports,"__esModule",{value:true});exports.updateValue=void 0;var _typeof2=_interopRequireDefault(require("@babel/runtime/helpers/typeof"));/**
* @author Peter Collins - https://github.com/onepetercollins
*
* @fileoverview : Exports a function: updateValue(state, payload, staticType)
*
* @function updateValue : For state drilling and surgical state updates.
* This function can be used to dynamically set infinitely nested object values.
* It takes current state, a payload object, and an optional boolean value as arguments.
* It returns a local function which returns updated state.
*
* @param {Object} state The object to be mutated.
* @param {Object} payload { name: String, newValue: any, child: Array }
* @param {String} payload.name Name of the key to be mutated or second object in the nesting hieriarchy.
* @param {any} payload.newValue New value to be inserted.
* @param {Array} payload.child Array of strings pointing to the nested key to be mutated.
* @param {Boolean} staticType Pass 'false' to turn off console error when altering data types.
* @returns {Function} (local function) (payload, staticType) => : The new app state, or current state if it was not altered.
*/
var updateValue=function updateValue(state,payload){var staticType=arguments.length>2&&arguments[2]!==undefined?arguments[2]:true;
/**
* @param {Object} payload { name: String, newValue: any, child: Array }
* @param {String} payload.name Name of the key to be mutated or second object in the nesting hieriarchy.
* @param {any} payload.newValue New value to be inserted.
* @param {Array} payload.child Array of strings pointing to the nested key to be mutated.
* @param {Boolean} staticType Pass 'false' to turn off console error when altering data types.
* @returns {Object} { updatedState } : The new app state, or current state if it was not altered.
*/
return function(){var payloadInherited=arguments.length>0&&arguments[0]!==undefined?arguments[0]:payload;var staticTypeInherited=arguments.length>1&&arguments[1]!==undefined?arguments[1]:staticType;
var currentState=JSON.parse(JSON.stringify(state));
var updatedState=null;
var name=payloadInherited.name,newValue=payloadInherited.newValue,child=payloadInherited.child;
var nameField=name;
var children=child;
var testArray=state?Array.from(state):null;
var snapshots=[];
var staticDataType=staticTypeInherited?true:false;
if((0,_typeof2.default)(state)!=='object'||state[state.length-1]===testArray.pop()&&typeof testArray.pop()!=="undefined"){
console.error("[state] must be a valid javascript object");
return state;
}
if((0,_typeof2.default)(children)==="object")/* check if 'children' is an empty array and nullify it */{
if(children.length===0&&typeof children[children.length-1]==="undefined"){
children=null;
}
}
if(!children&&!currentState.hasOwnProperty(nameField)){
console.error("The referenced property '".concat(nameField,"' does not exist in current state."));
return state;
}
if(!children&&newValue===currentState[nameField])/* warn if current state value corresponds with new value*/{
console.warn('State is already up to date.');
return state;
}else if(!children&&newValue!==currentState[nameField]){
if((0,_typeof2.default)(newValue)!==(0,_typeof2.default)(currentState[nameField])&&staticDataType)/* prevent unauthorized type changes */{
console.error("\n \n State update failed,\n \n You are attempting to perform unauthorized type changes.\n \n Pass 'false' to the (staticType) parameter of the 'updateValue()' function to allow type changes.\n ");
return state;
}else/* update and return state */{
Object.assign(currentState,state);
currentState[nameField]=newValue;
updatedState=currentState;
return updatedState;
}
}else if(children.length&&newValue!==currentState[nameField]){
for(var index=0;index<children.length;index++){
if(!snapshots.length){
if(typeof currentState[nameField][children[index]]!=="undefined"){
snapshots.push(currentState[nameField][children[index]]);
}else{
console.error("The referenced property '".concat(nameField,"' does not exist in current state."));
return state;
}
}else{
if(typeof snapshots[snapshots.length-1][children[index]]!=="undefined"){
snapshots.push(snapshots[snapshots.length-1][children[index]]);
}else{
console.error("The referenced property '".concat(nameField,"' does not exist in current state."));
return state;
}
}
if(index===children.length-1){
if(newValue===snapshots[snapshots.length-1])/* warn if current state value corresponds with new value*/{
console.warn('State is already up to date.');
return state;
}else{
if((0,_typeof2.default)(newValue)!==(0,_typeof2.default)(snapshots[snapshots.length-1])&&staticDataType)/* prevent unauthorized type changes */{
console.error("\n State update failed,\n \n You are attempting to perform unauthorized type changes.\n \n Pass 'false' to the (staticType) parameter of the 'updateValue()' function to allow type changes.\n ");
return state;
}else/* update and return state */{
for(var index0=snapshots.length-1;index0>=0;index0--){
if(index0===snapshots.length-1){
snapshots[index0]=newValue;
}else{
snapshots[index0][children[index0+1]]=snapshots[index0+1];
}
if(index0===0){
Object.assign(currentState,state);
currentState[nameField][children[index0]]=snapshots[index0];
updatedState=currentState;
return updatedState;
}
}
}
}
}
}
}else{
Object.assign(currentState,state);
return currentState;
}
};
};exports.updateValue=updateValue;
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https://github.com/onepetercollins\r\n * \r\n * @fileoverview : Exports a function: updateValue(state, payload, staticType)\r\n * \r\n * @function updateValue : For state drilling and surgical state updates.\r\n *                         This function can be used to dynamically set infinitely nested object values.\r\n *                         It takes current state, a payload object, and an optional boolean value as arguments.\r\n *                         It returns a local function which returns updated state.\r\n * \r\n * @param   {Object}   state The object to be mutated.\r\n * @param   {Object}   payload { name: String, newValue: any, child: Array }\r\n * @param   {String}   payload.name Name of the key to be mutated or second object in the nesting hieriarchy.\r\n * @param   {any}      payload.newValue New value to be inserted.\r\n * @param   {Array}    payload.child Array of strings pointing to the nested key to be mutated.\r\n * @param   {Boolean}  staticType Pass 'false' to turn off console error when altering data types.\r\n * @returns {Function} (local function) (payload, staticType) => : The new app state, or current state if it was not altered.\r\n */\r\n\r\n export const updateValue = (state, payload, staticType = true) => {\r\n\r\n    /**\r\n     * @param   {Object}  payload { name: String, newValue: any, child: Array }\r\n     * @param   {String}  payload.name Name of the key to be mutated or second object in the nesting hieriarchy.\r\n     * @param   {any}     payload.newValue New value to be inserted.\r\n     * @param   {Array}   payload.child Array of strings pointing to the nested key to be mutated.\r\n     * @param   {Boolean} staticType Pass 'false' to turn off console error when altering data types.\r\n     * @returns {Object}  { updatedState } : The new app state, or current state if it was not altered.\r\n     */\r\n\r\n    return function (payloadInherited = payload, staticTypeInherited = staticType) {\r\n        let currentState = JSON.parse(JSON.stringify(state));\r\n        let updatedState = null;\r\n        let { name, newValue, child } = payloadInherited;\r\n        let nameField = name;\r\n        let children = child;\r\n        let testArray = state ? Array.from(state) : null\r\n        let snapshots = [];\r\n        let staticDataType = staticTypeInherited ? true : false;\r\n    \r\n        if (typeof state !== 'object' || (state[state.length - 1] === testArray.pop() && typeof testArray.pop() !== \"undefined\")) {\r\n            console.error(`[state] must be a valid javascript object`);\r\n            return state;\r\n        }\r\n    \r\n        if (typeof children === \"object\") /* check if 'children' is an empty array and nullify it */ {\r\n            if (children.length === 0 && typeof children[children.length - 1] === \"undefined\") {\r\n                children = null;\r\n            }\r\n        }\r\n    \r\n        if (!children && !currentState.hasOwnProperty(nameField)) {\r\n            console.error(`The referenced property '${nameField}' does not exist in current state.`);\r\n            return state;\r\n        }\r\n    \r\n        if (!children && newValue === currentState[nameField]) /* warn if current state value corresponds with new value*/ {\r\n            console.warn('State is already up to date.');\r\n            return state;\r\n        } else if (!children && newValue !== currentState[nameField]) {\r\n            if (typeof newValue !== typeof currentState[nameField] && staticDataType) /* prevent unauthorized type changes */ {\r\n                console.error(`\r\n                    \\n State update failed,\r\n                    \\n You are attempting to perform unauthorized type changes.\r\n                    \\n Pass 'false' to the (staticType) parameter of the 'updateValue()' function to allow type changes.\r\n                `);\r\n                return state;\r\n            } else /* update and return state */ {\r\n                Object.assign(currentState, state);\r\n                currentState[nameField] = newValue;\r\n                updatedState = currentState;\r\n                return updatedState;\r\n            }\r\n        } else if (children.length && newValue !== currentState[nameField]) {\r\n            for (let index = 0; index < children.length; index++) {\r\n                if (!snapshots.length) {\r\n                    if (typeof currentState[nameField][children[index]] !== \"undefined\") {\r\n                        snapshots.push(currentState[nameField][children[index]]);\r\n                    } else {\r\n                        console.error(`The referenced property '${nameField}' does not exist in current state.`);\r\n                        return state;\r\n                    }\r\n                } else {\r\n                    if (typeof snapshots[snapshots.length - 1][children[index]] !== \"undefined\") {\r\n                        snapshots.push(snapshots[snapshots.length - 1][children[index]]);\r\n                    } else {\r\n                        console.error(`The referenced property '${nameField}' does not exist in current state.`);\r\n                        return state;\r\n                    }\r\n                }\r\n    \r\n                if (index === (children.length - 1)) {\r\n                    if (newValue === snapshots[snapshots.length - 1]) /* warn if current state value corresponds with new value*/ {\r\n                        console.warn('State is already up to date.');\r\n                        return state;\r\n                    } else {\r\n                        if (typeof newValue !== typeof snapshots[snapshots.length - 1] && staticDataType) /* prevent unauthorized type changes */ {\r\n                            console.error(`\r\n                                State update failed,\r\n                                \\n You are attempting to perform unauthorized type changes.\r\n                                \\n Pass 'false' to the (staticType) parameter of the 'updateValue()' function to allow type changes.\r\n                            `);\r\n                            return state;\r\n                        } else /* update and return state */ {\r\n                            for (let index0 = snapshots.length - 1; index0 >= 0; index0--) {\r\n                                if (index0 === (snapshots.length - 1)) {\r\n                                    snapshots[index0] = newValue;\r\n                                } else {\r\n                                    snapshots[index0][children[index0 + 1]] = snapshots[index0 + 1];\r\n                                }\r\n    \r\n                                if (index0 === 0) {\r\n                                    Object.assign(currentState, state);\r\n                                    currentState[nameField][children[index0]] = snapshots[index0];\r\n                                    updatedState = currentState;\r\n                                    return updatedState;\r\n                                }\r\n                            }\r\n                        }\r\n                    }\r\n                }\r\n            }\r\n        } else {\r\n            Object.assign(currentState, state);\r\n            return currentState;\r\n        }\r\n    }\r\n};\r\n"]}