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November 9, 2018 08:23
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import * as React from 'react' | |
import * as optimizely from '@optimizely/optimizely-sdk' | |
import { OptimizelyContext, VariableValue, IOptimizelySDKReactAPI } from './OptimizelyContext' | |
import { OptimizelyDatafile, DatafileWrapper } from './Datafile'; | |
interface OptimizelyProviderProps { | |
datafile: OptimizelyDatafile; | |
sdkOptions: object; | |
userId: string, | |
attributes: object | undefined; | |
} | |
interface OptimizelyProviderState { | |
userId: string, | |
attributes: object, | |
} | |
export interface OptimizelySDK { | |
getFeatureVariableString: (feature: string, variable: string, userid: string, attributes: object | undefined) => string, | |
getFeatureVariableBoolean: (feature: string, variable: string, userid: string, attributes: object | undefined) => boolean, | |
getFeatureVariableDouble: (feature: string, variable: string, userid: string, attributes: object | undefined) => number, | |
getFeatureVariableInteger: (feature: string, variable: string, userid: string, attributes: object | undefined) => number, | |
isFeatureEnabled: (feature: string, userid: string, attributes: object | undefined) => boolean, | |
} | |
class OptimizelyProvider extends React.Component<OptimizelyProviderProps, OptimizelyProviderState> { | |
datafileWrapper: DatafileWrapper; | |
api: IOptimizelySDKReactAPI; | |
featureVariableGetters: { | |
string: (feature: string, variable: string, userid: string, attributes: object | undefined) => string, | |
boolean: (feature: string, variable: string, userid: string, attributes: object | undefined) => boolean, | |
double: (feature: string, variable: string, userid: string, attributes: object | undefined) => number, | |
integer: (feature: string, variable: string, userid: string, attributes: object | undefined) => number, | |
} | |
instance: OptimizelySDK; | |
constructor(props) { | |
super(props) | |
const { | |
datafile, | |
sdkOptions, | |
userId, | |
attributes, | |
} = props | |
this.instance = optimizely.createInstance({ | |
datafile: datafile, | |
...sdkOptions, | |
}); | |
this.datafileWrapper = new DatafileWrapper(datafile); | |
this.state = { | |
userId, | |
attributes: { ...attributes }, | |
} | |
this.featureVariableGetters = { | |
'string': this.instance.getFeatureVariableString.bind(this.instance), | |
'boolean': this.instance.getFeatureVariableBoolean.bind(this.instance), | |
'double': this.instance.getFeatureVariableDouble.bind(this.instance), | |
'integer': this.instance.getFeatureVariableInteger.bind(this.instance), | |
}; | |
this.api = { | |
getFeatureVariable: this.getFeatureVariable, | |
getFeatureVariables: this.getFeatureVariables, | |
isFeatureEnabled: this.isFeatureEnabled, | |
}; | |
} | |
getFeatureVariables = (feature) => { | |
const { attributes, userId } = this.state; | |
const variableDefs = this.datafileWrapper.getVariablesForFeature(feature); | |
if (!variableDefs) { | |
// TODO: error | |
return {} | |
} | |
const variableObj = {} | |
variableDefs.forEach((({ key, type }) => { | |
const getFn = this.featureVariableGetters[type] | |
const value = getFn | |
? getFn(feature, key, userId, attributes) | |
: null | |
variableObj[key] = value | |
})) | |
return variableObj | |
} | |
getFeatureVariable = (feature: string, variable: string) : VariableValue | null => { | |
if (!this.isFeatureEnabled(feature)) { | |
return null; | |
} | |
const { attributes, userId } = this.state; | |
const variableType = this.datafileWrapper.getFeatureVariableType(feature, variable) | |
if (!variableType) { | |
return null; | |
} | |
const getFn = this.featureVariableGetters[variableType] | |
if (!getFn) { | |
return null; | |
} | |
return getFn(feature, variable, userId, attributes) | |
} | |
isFeatureEnabled = (feature: string) : boolean => { | |
const { attributes, userId } = this.state; | |
return this.instance.isFeatureEnabled(feature, userId, attributes) | |
} | |
render() { | |
return ( | |
<OptimizelyContext.Provider value={this.api}> | |
{ this.props.children } | |
</OptimizelyContext.Provider> | |
) | |
} | |
} | |
export default OptimizelyProvider |
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