spee.ch/helpers/lbryApi.js

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// load dependencies
var path = require('path');
var axios = require('axios');
// helper function to filter an array of claims for only free, public claims
function filterForFreePublicClaims(claimsListArray){
//console.log(">> filterForFreePublicClaims, claimsListArray:", claimsListArray);
if (!claimsListArray) {
return null;
};
var freePublicClaims = claimsListArray.filter(function(claim){
return (((claim.value.stream.metadata.license.indexOf('Public Domain') != -1) || (claim.value.stream.metadata.license.indexOf('Creative Commons') != -1)) &&
(!claim.value.stream.metadata.fee || claim.value.stream.metadata.fee === 0));
});
return freePublicClaims;
}
// helper function to decide if a claim is free and public
function isFreePublicClaim(claim){
console.log(">> isFreePublicClaim, claim:", claim);
if ((claim.value.stream.metadata.license === 'Public Domain' || claim.value.stream.metadata.license === 'Creative Commons') &&
(!claim.value.stream.metadata.fee || claim.value.stream.metadata.fee.amount === 0)) {
return true;
} else {
return false;
}
}
// helper function to order a set of claims
function orderTopClaims(claimsListArray){
console.log(">> orderTopClaims, claimsListArray:");
claimsListArray.sort(function(claimA, claimB){
if (claimA.amount === claimB.amount){
return (claimA.height > claimB.height);
} else {
return (claimA.amount < claimB.amount);
}
})
return claimsListArray;
}
function getClaimWithUri(uri, resolve, reject){
console.log(">> making get request to lbry daemon")
axios.post('http://localhost:5279/lbryapi', {
method: "get",
params: { uri: uri }
}
).then(function (getUriResponse) {
console.log(">> 'get claim' success...");
//check to make sure the daemon didn't just time out
if (getUriResponse.data.result.error === "Timeout"){
reject("get request to lbry daemon timed out");
}
console.log(">> response data:", getUriResponse.data);
console.log(">> dl path =", getUriResponse.data.result.download_path)
// resolve the promise with the download path for the claim we got
/*
note: put in a check to make sure we do not resolve until the download is actually complete
*/
resolve(getUriResponse.data.result.download_path);
}).catch(function(getUriError){
console.log(">> 'get' error:", getUriError.response.data);
// reject the promise with an error message
reject(getUriError.response.data.error.message);
return;
});
}
module.exports = {
publishClaim: function(publishObject){
axios.post('http://localhost:5279/lbryapi', publishObject)
.then(function (response) {
// receive resonse from LBRY
// if successfull, (1) delete file (2) send response to the client
console.log(">> 'publish' success...");
console.log(">> 'publish' response.data:", response.data);
console.log(" [x] Done");
// return the claim we got
//res.status(200).send(JSON.stringify({msg: "you succsessfully published!", txData: response.data}));
}).catch(function(error){
// receive response from LBRY
// if not successfull, (1) delete file and (2) send response to the client
console.log(">> 'publish' error.response.data:", error.response.data);
console.log(" [x] Done");
//res.status(500).send(JSON.stringify({msg: "your file was not published", err: error.response.data.error.message}));
})
},
getClaimBasedOnNameOnly: function(claimName){
// 1. create a promise
var deferred = new Promise(function (resolve, reject){
// 2. code to resolve or reject the promise
// make a call to the daemon to get the claims list
axios.post('http://localhost:5279/lbryapi', { // receives a promise
method: "claim_list",
params: { name: claimName }
})
.then(function (response) {
console.log(">> Claim_list success");
var claimsList = response.data.result.claims;
console.log(">> Number of claims:", claimsList.length)
// return early if no claims were found
if (claimsList.length === 0){
reject("no claims were found");
console.log("exiting due to lack of claims");
return;
}
// filter the claims to return only free, public claims
var freePublicClaims = filterForFreePublicClaims(claimsList);
// return early if no free, public claims were found
if (!freePublicClaims || (freePublicClaims.length === 0)){
reject("no free, public claims were found");
console.log("exiting due to lack of free or public claims");
return;
}
// order the claims
var orderedPublcClaims = orderTopClaims(freePublicClaims);
// create the uri for the first (selected) claim
console.log(">> ordered free public claims", orderedPublcClaims);
var freePublicClaimUri = "lbry://" + orderedPublcClaims[0].name + "#" + orderedPublcClaims[0].claim_id;
console.log(">> your free public claim uri:", freePublicClaimUri);
// fetch the image to display
getClaimWithUri(freePublicClaimUri, resolve, reject);
})
.catch(function(error){
console.log(">> error:", error);
// reject the promise with an approriate message
reject(error.response.data.error);
return;
});
});
// 3. return the promise
return deferred;
},
getClaimBasedOnUri: function(uri){
/*
to do: need to pass the URI through a test (use 'resolve') to see if it is free and public. Right now it is jumping straight to 'get'ing and serving the asset.
*/
var deferred = new Promise(function (resolve, reject){
console.log(">> your uri:", uri);
// fetch the image to display
getClaimWithUri(uri, resolve, reject);
});
return deferred;
},
serveAllClaims: function(claimName, res){ // note: work in progress
// make a call to the daemon to get the claims list
axios.post('http://localhost:5279/lbryapi', {
method: "claim_list",
params: { name: claimName }
}
).then(function (response) {
console.log(">> Claim_list success");
console.log(">> Number of claims:", response.data.result.claims.length)
// return early if no claims were found
if (response.data.result.claims.length === 0){
res.status(200).sendFile(path.join(__dirname, '../public', 'noClaims.html'));
return;
}
// filter the claims to return free, public claims
var freePublicClaims = filterForFreePublicClaims(response.data.result.claims);
// return early if no free, public claims were found
if (!freePublicClaims || (freePublicClaims.length === 0)){
res.status(200).sendFile(path.join(__dirname, '../public', 'noClaims.html'));
return;
}
console.log(">> Number of free public claims:", freePublicClaims.length);
// order the claims
var orderedPublicClaims = orderTopClaims(freePublicClaims);
// serve the response
/*
to do: rather than returning json, serve a page of all these claims
*/
res.status(200).send(orderedPublicClaims);
}).catch(function(error){
console.log(">> /c/ error:", error.response.data);
// serve the response
res.status(500).send(JSON.stringify({msg: "An error occurred while finding the claim list.", err: error.response.data.error.message}));
})
}
}