Compute cost estimate on client side when possible

ui/js/component/common.js

@@ -62,6 +62,7 @@ export let CreditAmount = React.createClass({
   propTypes: {
     amount: React.PropTypes.number.isRequired,
     precision: React.PropTypes.number,
+    isEstimate: React.PropTypes.bool,
     label: React.PropTypes.bool,
     showFree: React.PropTypes.bool,
     look: React.PropTypes.oneOf(['indicator', 'plain']),
@@ -100,7 +101,6 @@ export let FilePrice = React.createClass({
   _isMounted: false,
 
   propTypes: {
-    metadata: React.PropTypes.object,
     uri: React.PropTypes.string.isRequired,
     look: React.PropTypes.oneOf(['indicator', 'plain']),
   },
@@ -113,8 +113,8 @@ export let FilePrice = React.createClass({
 
   componentWillMount: function() {
     this.setState({
-      cost: this.props.metadata ? this.props.metadata.fee : null,
-      isEstimate: this.props.metadata ? true : null,
+      cost: null,
+      isEstimate: null,
     });
   },
 
@@ -124,7 +124,7 @@ export let FilePrice = React.createClass({
       if (this._isMounted) {
         this.setState({
           cost: cost,
-          isEstimate: includesData,
+          isEstimate: !includesData,
         });
       }
     }, (err) => {
@@ -141,7 +141,7 @@ export let FilePrice = React.createClass({
       return <span className={`credit-amount credit-amount--${this.props.look}`}>???</span>;
     }
 
-    return <CreditAmount label={false} amount={this.props.metadata.fee.amount} isEstimate={true} showFree={true} />
+    return <CreditAmount label={false} amount={this.state.cost} isEstimate={this.state.isEstimate} showFree={true} />
   }
 });
 

ui/js/component/file-tile.js

@@ -26,7 +26,6 @@ export let FileTileStream = React.createClass({
     return {
       showNsfwHelp: false,
       isHidden: false,
-      available: null,
     }
   },
   getDefaultProps: function() {
@@ -143,7 +142,6 @@ export let FileCardStream = React.createClass({
     return {
       showNsfwHelp: false,
       isHidden: false,
-      available: null,
     }
   },
   getDefaultProps: function() {
@@ -232,7 +230,6 @@ export let FileTile = React.createClass({
 
   propTypes: {
     uri: React.PropTypes.string.isRequired,
-    available: React.PropTypes.bool,
   },
 
   getInitialState: function() {

ui/js/lbry.js

@@ -217,12 +217,18 @@ lbry.getPeersForBlobHash = function(blobHash, callback) {
 lbry.costPromiseCache = {}
 lbry.getCostInfo = function(lbryUri) {
   if (lbry.costPromiseCache[lbryUri] === undefined) {
-    const COST_INFO_CACHE_KEY = 'cost_info_cache';
     lbry.costPromiseCache[lbryUri] = new Promise((resolve, reject) => {
+      const COST_INFO_CACHE_KEY = 'cost_info_cache';
       let costInfoCache = getSession(COST_INFO_CACHE_KEY, {})
 
+      function cacheAndResolve(cost, includesData) {
+        costInfoCache[lbryUri] = {cost, includesData};
+        setSession(COST_INFO_CACHE_KEY, costInfoCache);
+        resolve({cost, includesData});
+      }
+
       if (!lbryUri) {
-        reject(new Error(`URI required.`));
+        return reject(new Error(`URI required.`));
       }
 
       if (costInfoCache[lbryUri] && costInfoCache[lbryUri].cost) {
@@ -231,27 +237,44 @@ lbry.getCostInfo = function(lbryUri) {
 
       function getCost(lbryUri, size) {
         lbry.stream_cost_estimate({uri: lbryUri, ... size !== null ? {size} : {}}).then((cost) => {
-          costInfoCache[lbryUri] = {
-            cost: cost,
-            includesData: size !== null,
-          };
-          setSession(COST_INFO_CACHE_KEY, costInfoCache);
-          resolve(costInfoCache[lbryUri]);
+          cacheAndResolve(cost, size !== null);
         }, reject);
       }
 
+      function getCostGenerous(lbryUri) {
+        // If generous is on, the calculation is simple enough that we might as well do it here in the front end
+        lbry.resolve({uri: lbryUri}).then((resolutionInfo) => {
+          const fee = resolutionInfo.claim.value.stream.metadata.fee;
+          if (fee === undefined) {
+            cacheAndResolve(0, true);
+          } else if (fee.currency == 'LBC') {
+            cacheAndResolve(fee.amount, true);
+          } else {
+            lbryio.getExchangeRates().then(({lbc_usd}) => {
+              cacheAndResolve(fee.amount / lbc_usd, true);
+            });
+          }
+        });
+      }
+
       const uriObj = uri.parseLbryUri(lbryUri);
       const name = uriObj.path || uriObj.name;
 
-      lighthouse.get_size_for_name(name).then((size) => {
-        if (size) {
-          getCost(name, size);
+      lbry.settings_get({allow_cached: true}).then(({is_generous_host}) => {
+        if (is_generous_host) {
+          return getCostGenerous(lbryUri);
         }
-        else {
+
+        lighthouse.get_size_for_name(name).then((size) => {
+          if (size) {
+            getCost(name, size);
+          }
+          else {
+            getCost(name, null);
+          }
+        }, () => {
           getCost(name, null);
-        }
-      }, () => {
-        getCost(name, null);
+        });
       });
     });
   }

ui/js/lbryio.js

@@ -44,7 +44,7 @@ lbryio.getExchangeRates = function() {
   });
 }
 
-lbryio.call = function(resource, action, params={}, method='get', evenIfDisabled=false) { // evenIfDisabled is for development, when we may have some calls working and some not
+lbryio.call = function(resource, action, params={}, method='get', evenIfDisabled=false) { // evenIfDisabled is just for development, when we may have some calls working and some not
   return new Promise((resolve, reject) => {
     if (!lbryio.enabled && !evenIfDisabled && (resource != 'discover' || action != 'list')) {
       reject(new Error("LBRY interal API is disabled"))