115 lines
4 KiB
JavaScript
115 lines
4 KiB
JavaScript
import axios from "axios";
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export const wotStoreModule = {
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namespaced: true,
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state: () => ({
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thingDescriptions: {},
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servient: null,
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helpers: null,
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}),
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mutations: {
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addThingDescription(state, { thingName, thingDescription }) {
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state.thingDescriptions[thingName] = thingDescription;
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},
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removeThingDescription(state, thingName) {
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delete state.thingDescriptions[thingName];
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},
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removeAllThingDescriptions(state) {
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state.thingDescriptions = {};
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},
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},
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actions: {
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async start() {
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// Set up thing client - not currently used.
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},
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async fetchThingDescription({ commit }, { uri, name = null }) {
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// Fetch the thing description from the given URI and consume it
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// NB this should only be called once, or we'll duplicate effort.
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// Deduplication should be done elsewhere.
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let response = await axios.get(uri);
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let td = response.data;
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let thing_name = name | uri.replace(/\/$/, "").split("/").pop();
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commit("addThingDescription", {
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thingName: thing_name,
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thingDescription: td,
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});
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},
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async fetchThingDescriptions({ commit }, uri) {
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// Fetch thing descriptions from the given URI
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let response = await axios.get(uri);
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if (response.status != 200) throw "Could not retrieve thing descriptions";
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for (const k in response.data) {
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let thing_name = k.replace(/\/$/, "").replace(/^\//, "");
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commit("addThingDescription", {
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thingName: thing_name,
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thingDescription: response.data[k],
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});
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}
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},
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},
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getters: {
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thingDescriptions: (state) => {
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return state.thingDescriptions;
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},
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thingList: (state) => {
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return Object.keys(state.thingDescriptions);
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},
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thingDescription: (state) => (thingName) => {
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return state.thingDescriptions[thingName];
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},
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thingAvailable: (state) => (thingName) => {
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return thingName in state.thingDescriptions;
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},
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thingAffordanceAvailable: (state) => (thing, affordanceType, affordance) => {
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let td = state.thingDescriptions[thing];
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if (!td) {
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return false;
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}
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return affordance in td[affordanceType];
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},
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thingFormUrl:
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(state) =>
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(thing, affordanceType, affordance, op, allowUndefined = true) => {
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// Find the URL for a particular operation
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let td = state.thingDescriptions[thing];
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if (!td) {
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if (allowUndefined) return undefined;
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throw `Could not find form for ${affordanceType} ${thing}/${affordance} with op ${op}`;
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}
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let affordances = td[affordanceType];
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let href = findFormHref(affordances[affordance], op);
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if (href == undefined) {
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if (allowUndefined) return undefined;
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throw `Could not find form for ${affordanceType} ${thing}/${affordance} with op ${op}`;
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}
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// If we've found an href, prepend the `base` URL if appropriate
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if (href.startsWith("http")) return href;
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if ("base" in td) {
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let base = td.base;
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if (href.startsWith("/")) href = href.slice(1);
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if (!base.endsWith("/")) base += "/";
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return base + href;
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}
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return href;
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},
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thingPropertyUrl: (_state, getters) => (thing, property, op, allowUndefined) => {
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// Find the URL for a particular property
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return getters.thingFormUrl(thing, "properties", property, op, allowUndefined);
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},
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thingActionUrl: (_state, getters) => (thing, action, op, allowUndefined) => {
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// Find the URL for a particular action
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return getters.thingFormUrl(thing, "actions", action, op, allowUndefined);
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},
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},
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};
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export function findFormHref(affordance, op) {
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// Find the form in the affordance that matches the given operation type
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if (affordance == undefined) return undefined;
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let forms = affordance.forms;
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let matchingForm = forms.find((f) => f.op == op || f.op.includes(op));
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if (matchingForm == undefined) return undefined;
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return matchingForm.href;
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}
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export default wotStoreModule;
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