66 lines
1.7 KiB
JavaScript
66 lines
1.7 KiB
JavaScript
export const BB_STATE_BINDINGPATH = "##bbstate"
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export const BB_STATE_BINDINGSOURCE = "##bbsource"
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export const BB_STATE_FALLBACK = "##bbstatefallback"
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export const isBound = prop => !!parseBinding(prop)
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/**
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*
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* @param {object|string|number} prop - component property to parse for a dynamic state binding
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* @returns {object|boolean}
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*/
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export const parseBinding = prop => {
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if (!prop) return false
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if (isBindingExpression(prop)) {
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return parseBindingExpression(prop)
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}
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if (isAlreadyBinding(prop)) {
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return {
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path: prop.path,
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source: prop.source || "store",
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fallback: prop.fallback,
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}
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}
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if (hasBindingObject(prop)) {
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return {
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path: prop[BB_STATE_BINDINGPATH],
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fallback: prop[BB_STATE_FALLBACK] || "",
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source: prop[BB_STATE_BINDINGSOURCE] || "store",
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}
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}
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}
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export const isStoreBinding = binding => binding && binding.source === "store"
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export const isContextBinding = binding => binding && binding.source === "context"
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export const isEventBinding = binding => binding && binding.source === "event"
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const hasBindingObject = prop =>
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typeof prop === "object" && prop[BB_STATE_BINDINGPATH] !== undefined
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const isAlreadyBinding = prop => typeof prop === "object" && prop.path
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const isBindingExpression = prop =>
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typeof prop === "string" &&
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(prop.startsWith("state.") ||
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prop.startsWith("context.") ||
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prop.startsWith("event.") ||
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prop.startsWith("route."))
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const parseBindingExpression = prop => {
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let [source, ...rest] = prop.split(".");
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let path = rest.join(".")
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if (source === "route") {
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source = "state"
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path = `##routeParams.${path}`
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}
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return {
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fallback: "", // TODO: provide fallback support
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source,
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path,
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}
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}
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