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import _ from 'underscore';
import { combineReducers } from 'redux';
import { BROWSE, RECEIVE_COMPONENTS, SHOW_SOURCE } from '../actions';
export function fetching (state = false, action) {
switch (action.type) {
case BROWSE:
return true;
case RECEIVE_COMPONENTS:
return false;
default:
return state;
}
}
export function baseComponent (state = null, action) {
switch (action.type) {
case RECEIVE_COMPONENTS:
return action.baseComponent;
default:
return state;
}
}
export function components (state = null, action) {
switch (action.type) {
case RECEIVE_COMPONENTS:
return action.components;
default:
return state;
}
}
export function breadcrumbs (state = [], action) {
switch (action.type) {
case BROWSE:
const existedIndex = state.findIndex(b => b.key === action.baseComponent.key);
let nextBreadcrumbs;
if (existedIndex === -1) {
// browse deeper
nextBreadcrumbs = [...state, action.baseComponent];
} else {
// use breadcrumbs
nextBreadcrumbs = [...state.slice(0, existedIndex + 1)];
}
return nextBreadcrumbs;
case SHOW_SOURCE:
return [...state, action.component];
default:
return state;
}
}
export function sourceViewer (state = null, action) {
switch (action.type) {
case BROWSE:
return null;
case SHOW_SOURCE:
return action.component;
default:
return state;
}
}
function selectCoverageMetric (component) {
const coverage = _.findWhere(component.msr, { key: 'coverage' });
const itCoverage = _.findWhere(component.msr, { key: 'it_coverage' });
const overallCoverage = _.findWhere(component.msr, { key: 'overall_coverage' });
if (coverage != null && itCoverage != null && overallCoverage != null) {
return 'overall_coverage';
} else if (coverage != null) {
return 'coverage';
} else {
return 'it_coverage';
}
}
export function coverageMetric (state = null, action) {
switch (action.type) {
case BROWSE:
return state !== null ? state : selectCoverageMetric(action.baseComponent);
default:
return state;
}
}
const rootReducer = combineReducers({
fetching,
baseComponent,
components,
breadcrumbs,
sourceViewer,
coverageMetric
});
export default rootReducer;
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