substate/dist/index.umd.js

Pub/Sub pattern with State Management

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r=s.indexOf(e);r>-1&&(s.splice(r,1),0===s.length&&delete this.events[t])}}removeAll(){this.events=Object.create(null)}removeAllOf(t){this.events[t]=[]}emit(t,e={}){const s=this.events[t];if(s&&s.length>0)for(const t of s)t(e)}}const g=i();class p extends d{name;afterUpdate;beforeUpdate;currentState;stateStorage;defaultDeep;maxHistorySize;taggedStates;_hasMiddleware;_hasTaggedStates;constructor(t={}){super(),this.name=t.name||"SubStateInstance",this.afterUpdate=t.afterUpdate||[],this.beforeUpdate=t.beforeUpdate||[],this.currentState=t.currentState||0,this.stateStorage=t.stateStorage||[],this.defaultDeep=t.defaultDeep||!1,this.maxHistorySize=t.maxHistorySize||50,this.taggedStates=new Map,this._hasMiddleware=this.beforeUpdate.length>0||this.afterUpdate.length>0,this._hasTaggedStates=!1,t.state&&this.stateStorage.push(t.state),this.on(c,t=>this.updateState(t))}getState(t){return this.stateStorage[t]}getCurrentState(){return this.stateStorage[this.currentState]}getProp(t){const s=this.getCurrentState();return function(t){if(void 0===t)throw new Error("String is undefined");return t.includes(".")||t.includes("[")}(t)?e(s,t):s[t]}resetState(){this.currentState=0,this.stateStorage=[this.stateStorage[0]],this.emit(o)}updateState(t){const e=Object.keys(t),s=this.getCurrentState();if(this.canUseFastPathOptimized(t,e))return void this.fastUpdateStateOptimized(t,s,e);this._hasMiddleware&&this.fireBeforeMiddleware(t);const r=function(t,e){return void 0!==t.$deep?t.$deep:e}(t,this.defaultDeep);let n=this.cloneStateOptimized(r,s);n=this.tempUpdateOptimized(n,t,e,this.defaultDeep),this.pushState(n),this.updateTaggedStates(t,n),this._hasMiddleware&&this.fireAfterMiddleware(t),this.emit(t.$type||a,n)}batchUpdateState(t){if(0!==t.length){if(!this._hasMiddleware&&!this._hasTaggedStates){let e=!0;for(let s=0;s<t.length;s++){const r=t[s];if(r.$deep||void 0!==r.$tag){e=!1;break}const n=Object.keys(r);for(let t=0;t<n.length;t++){const s=n[t];if(s.includes(".")||"$deep"===s||"$type"===s||"$tag"===s){e=!1;break}}if(!e)break}if(e)return void this.fastBatchUpdate(t)}for(let e=0;e<t.length;e++)this.updateState(t[e])}}sync(t){const{readerObj:s,stateField:r,readField:n=r,beforeUpdate:i=[],afterUpdate:o=[]}=t;this.validateSyncFields(r);const c=t=>{const e={source:"substate",field:r,readField:n};let s=t;return i.forEach(t=>{s=t(s,e,this)}),s},f=t=>{const e={source:"substate",field:r,readField:n};o.forEach(s=>{s(t,e,this)})},u=t=>{const i=e(t,r);if(void 0!==i){const t=c(i);e(s,n,t),f(t)}},h=this.getProp(r);if(void 0!==h){const t=c(h);e(s,n,t),f(t)}return this.on(a,u),{unsync:()=>{this.off(a,u)}}}clearHistory(){const t=this.stateStorage.length,e=this.getCurrentState();this.stateStorage=[e],this.currentState=0,this.taggedStates.clear(),this.emit(l,{previousLength:t})}limitHistory(t){if(t<1)throw new Error("History size must be at least 1");const e=this.maxHistorySize;if(this.maxHistorySize=t,this.stateStorage.length>t){const e=this.stateStorage.length-t;this.stateStorage.splice(0,e);for(const[t,s]of this.taggedStates.entries())s.stateIndex<e?this.taggedStates.delete(t):s.stateIndex-=e;this.currentState=this.stateStorage.length-1}this.emit(h,{previousSize:e,newSize:t,currentHistoryLength:this.stateStorage.length})}getMemoryUsage(){const t=this.stateStorage.length;if(0===t)return{stateCount:0,taggedCount:0,estimatedSizeKB:0};let e=0;try{const s=Math.min(3,t);let r=0;for(let e=0;e<s;e++){const n=Math.floor(e*(t-1)/Math.max(1,s-1));r+=2*JSON.stringify(this.stateStorage[n]).length}e=(s>0?r/s:0)*t}catch(t){return{stateCount:this.stateStorage.length,taggedCount:this.taggedStates.size,estimatedSizeKB:null}}const s=Math.max(1,Math.round(e/1024));return{stateCount:t,taggedCount:this.taggedStates.size,estimatedSizeKB:s}}getTaggedState(t){const e=this.taggedStates.get(t);return e?g(e.state):void 0}getAvailableTags(){return Array.from(this.taggedStates.keys())}jumpToTag(t){const e=this.taggedStates.get(t);if(!e)throw new Error(`Tag "${t}" not found`);const s=g(e.state);delete s.$tag,this.pushState(s),this.emit(u,{tag:t,state:this.getCurrentState()}),this.emit(a,this.getCurrentState())}removeTag(t){const e=this.taggedStates.has(t);return this.taggedStates.delete(t),e&&this.emit(f,{tag:t}),e}clearTags(){const t=this.taggedStates.size;this.taggedStates.clear(),this.emit("TAGS_CLEARED",{clearedCount:t})}get hasMiddleware(){return this._hasMiddleware}get hasTaggedStates(){return this._hasTaggedStates}updateTaggedStates(t,e){t.$tag&&(this._hasTaggedStates=!0,this.taggedStates.set(t.$tag,{stateIndex:this.currentState,state:g(e)}))}pushState(t){this.stateStorage.push(t),this.stateStorage.length>this.maxHistorySize&&this.performHistoryTrim(),this.currentState=this.stateStorage.length-1}performHistoryTrim(){if(this.stateStorage.length<=this.maxHistorySize)return;const t=this.stateStorage.length-this.maxHistorySize;this.stateStorage.splice(0,t);for(const[e,s]of this.taggedStates.entries())s.stateIndex<t?this.taggedStates.delete(e):s.stateIndex-=t;this.currentState=this.stateStorage.length-1}fireBeforeMiddleware(t){this.beforeUpdate.length>0&&this.beforeUpdate.forEach(e=>{e(this,t)})}fireAfterMiddleware(t){this.afterUpdate.length>0&&this.afterUpdate.forEach(e=>{e(this,t)})}canUseFastPathOptimized(t,e){if(this._hasMiddleware||this._hasTaggedStates||t.$deep||t.$tag)return!1;for(let t=0;t<e.length;t++){const s=e[t];if(s.includes(".")||s.includes("[")||"$type"===s)return!1}return!0}cloneStateOptimized(t,e){return t?g(e):{...e}}tempUpdateOptimized(t,s,r,n){let i=!1;for(let t=0;t<r.length;t++){const e=r[t];if(e.includes(".")||e.includes("[")){i=!0;break}}if(i){const n=[],i=[];for(let t=0;t<r.length;t++){const e=r[t];e.includes(".")||e.includes("[")?i.push(e):n.push(e)}for(let e=0;e<n.length;e++){const r=n[e];t[r]=s[r]}for(let r=0;r<i.length;r++){const n=i[r];e(t,n,s[n])}}else for(let e=0;e<r.length;e++){const n=r[e];t[n]=s[n]}return n||(t.$deep=!1),t.$type=s.$type||c,t}fastUpdateStateOptimized(t,e,s){const r={...e};for(let e=0;e<s.length;e++){const n=s[e];"$deep"!==n&&"$type"!==n&&"$tag"!==n&&(r[n]=t[n])}r.$type=c,this.pushState(r),this.emit(a,r)}fastBatchUpdate(t){const e={...this.getCurrentState()};for(let s=0;s<t.length;s++){const r=t[s],n=Object.keys(r);for(let t=0;t<n.length;t++){const s=n[t];"$deep"!==s&&"$type"!==s&&"$tag"!==s&&(e[s]=r[s])}}e.$type=c,this.pushState(e),this.emit(a,e)}validateSyncFields(t){if(void 0===this.getProp(t))throw new Error(`State field '${t}' not found in current state. Available state properties: ${Object.keys(this.getCurrentState()).join(", ")}`)}}t.Substate=p,t.createStore=function(t={}){return new p({name:t.name,state:t.state,defaultDeep:t.defaultDeep??!1,beforeUpdate:t.beforeUpdate||[],afterUpdate:t.afterUpdate||[],maxHistorySize:t.maxHistorySize??50})}});
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