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index.js
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index.js
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const {
ApolloServer,
gql,
PubSub
} = require("apollo-server");
const fetch = require("node-fetch");
const lifts = require("./data/lifts.json");
const trails = require("./data/trails.json");
const pubsub = new PubSub();
const context = { lifts, trails, pubsub };
const typeDefs = gql`
type Lift {
id: ID!
name: String!
status: LiftStatus!
capacity: Int!
night: Boolean!
elevationGain: Int!
trailAccess: [Trail!]!
}
type Trail {
id: ID!
name: String!
status: TrailStatus
difficulty: String!
groomed: Boolean!
trees: Boolean!
night: Boolean!
accessedByLifts: [Lift!]!
}
# STEP 1. Add the type
# I added an Activity Type based on the Strava fields that I
# want to use in this service
type Activity {
id: ID!
name: String
distance: Float
type: String
time: Int
}
enum LiftStatus {
OPEN
HOLD
CLOSED
}
enum TrailStatus {
OPEN
CLOSED
}
type Query {
allLifts(status: LiftStatus): [Lift!]!
Lift(id: ID!): Lift!
liftCount(status: LiftStatus!): Int!
allTrails(status: TrailStatus): [Trail!]!
Trail(id: ID!): Trail!
trailCount(status: TrailStatus!): Int!
# STEP 2. Add the Query
# Add the myActivities query to provide a list of activities
myActivities: [Activity!]!
}
type Mutation {
setLiftStatus(id: ID!, status: LiftStatus!): Lift!
setTrailStatus(id: ID!, status: TrailStatus!): Trail!
}
type Subscription {
liftStatusChange: Lift
trailStatusChange: Trail
}
`;
const resolvers = {
Query: {
// # STEP 3. Add the Resolver
myActivities: async () => {
let results = await fetch(
"https://www.strava.com/api/v3/activities?per_page=100",
{
headers: {
Authorization: "Bearer <Your_Strava_Token_here>"
}
}
).then((r) => r.json());
return results;
},
allLifts: (root, { status }, { lifts }) => {
if (!status) {
return lifts;
} else {
let filteredLifts = lifts.filter(
(lift) => lift.status === status
);
return filteredLifts;
}
},
Lift: (parent, { id }, { lifts }) =>
lifts.find((lift) => id === lift.id),
liftCount: (parent, { status }, { lifts }) => {
let i = 0;
lifts.map((lift) => {
lift.status === status ? i++ : null;
});
return i;
},
allTrails: (root, { status }, { trails }) => {
if (!status) {
return trails;
} else {
let filteredTrails = trails.filter(
(trail) => trail.status === status
);
return filteredTrails;
}
},
Trail: (root, { id }, { trails }) =>
trails.find((trail) => id === trail.id),
trailCount: (root, { status }, { trails }) => {
let i = 0;
trails.map((trail) => {
trail.status === status ? i++ : null;
});
return i;
}
},
Mutation: {
setLiftStatus: (
root,
{ id, status },
{ lifts, pubsub }
) => {
let updatedLift = lifts.find(
(lift) => id === lift.id
);
updatedLift.status = status;
pubsub.publish("lift-status-change", {
liftStatusChange: updatedLift
});
return updatedLift;
},
setTrailStatus: (
root,
{ id, status },
{ trails, pubsub }
) => {
let updatedTrail = trails.find(
(trail) => id === trail.id
);
updatedTrail.status = status;
pubsub.publish("trail-status-change", {
trailStatusChange: updatedTrail
});
return updatedTrail;
}
},
Subscription: {
liftStatusChange: {
subscribe: (root, data, { pubsub }) =>
pubsub.asyncIterator("lift-status-change")
},
trailStatusChange: {
subscribe: (root, data, { pubsub }) =>
pubsub.asyncIterator("trail-status-change")
}
},
Lift: {
trailAccess: (root, args, { trails }) =>
root.trails
.map((id) => trails.find((t) => id === t.id))
.filter((x) => x)
},
Trail: {
accessedByLifts: (root, args, { lifts }) =>
root.lift
.map((id) => lifts.find((l) => id === l.id))
.filter((x) => x)
}
};
const server = new ApolloServer({
typeDefs,
resolvers,
context
});
server.listen().then(({ url }) => {
console.log(`Server running at ${url}`);
});