controllers/serveController.js

@@ -1,7 +1,11 @@
 const lbryApi = require('../helpers/lbryApi.js');
 const db = require('../models');
 const logger = require('winston');
-const { getTopFreeClaim, getFullClaimIdFromShortId, resolveAgainstClaimTable, getClaimIdByChannel } = require('../helpers/serveHelpers.js');
+const { getTopFreeClaim, getFullClaimIdFromShortId, resolveAgainstClaimTable, serveFile, showFile, showFileLite, getShortClaimIdFromLongClaimId, getClaimIdByLongChannelId, getAllChannelClaims, getLongChannelId, getShortChannelIdFromLongChannelId } = require('../helpers/serveHelpers.js');
+const { postToStats, sendGoogleAnalytics } = require('../controllers/statsController.js');
+const SERVE = 'SERVE';
+const SHOW = 'SHOW';
+const SHOWLITE = 'SHOWLITE';
 
 function checkForLocalAssetByClaimId (claimId, name) {
   return new Promise((resolve, reject) => {
@@ -90,19 +94,6 @@ function getAssetByClaimId (fullClaimId, name) {
 }
 
 module.exports = {
-  getAssetByChannel (channelName, channelId, claimName) {
-    logger.debug('channelId =', channelId);
-    return new Promise((resolve, reject) => {
-      getClaimIdByChannel(channelName, channelId, claimName)
-      .then(claimId => {
-        logger.debug('claim id = ', claimId);
-        resolve(getAssetByClaimId(claimId, claimName));
-      })
-      .catch(error => {
-        reject(error);
-      });
-    });
-  },
   getAssetByShortId: function (shortId, name) {
     logger.debug('...getting asset by short id...');
     return new Promise((resolve, reject) => {
@@ -143,10 +134,97 @@ module.exports = {
       });
     });
   },
-  getChannelByName (name) {
+  getAssetByChannel (channelName, channelId, claimName) {
-    logger.debug('...getting channel by channel name...');
+    logger.debug('channelId =', channelId);
     return new Promise((resolve, reject) => {
-      reject(new Error('This feature is not yet supported'));
+      // 1. get the long channel id
+      getLongChannelId(channelName, channelId)
+      // 2. get the claim Id
+      .then(longChannelId => {
+        return getClaimIdByLongChannelId(longChannelId, claimName);
+      })
+      // 3. get the asset by this claim id and name
+      .then(claimId => {
+        logger.debug('asset claim id = ', claimId);
+        resolve(getAssetByClaimId(claimId, claimName));
+      })
+      .catch(error => {
+        reject(error);
+      });
     });
   },
+  getChannelContents (channelName, channelId) {
+    return new Promise((resolve, reject) => {
+      let longChannelId;
+      let shortChannelId;
+      // 1. get the long channel Id
+      getLongChannelId(channelName, channelId)
+      // 2. get all claims for that channel
+      .then(result => {
+        longChannelId = result;
+        return getShortChannelIdFromLongChannelId(channelName, longChannelId);
+      })
+      // 3. get all Claim records for this channel
+      .then(result => {
+        shortChannelId = result;
+        return getAllChannelClaims(longChannelId);
+      })
+      // 4. add extra data not available from Claim table
+      .then(allChannelClaims => {
+        if (allChannelClaims) {
+          allChannelClaims.forEach(element => {
+            element['channelName'] = channelName;
+            element['longChannelId'] = longChannelId;
+            element['shortChannelId'] = shortChannelId;
+            element['fileExtension'] = element.contentType.substring(element.contentType.lastIndexOf('/') + 1);
+          });
+        }
+        return resolve(allChannelClaims);
+      })
+      .catch(error => {
+        reject(error);
+      });
+    });
+  },
+  serveOrShowAsset (fileInfo, extension, method, headers, originalUrl, ip, res) {
+    // add file extension to the file info
+    if (extension === '.gifv') {
+      fileInfo['fileExt'] = '.gifv';
+    } else {
+      fileInfo['fileExt'] = fileInfo.fileName.substring(fileInfo.fileName.lastIndexOf('.'));
+    }
+    // serve or show
+    switch (method) {
+      case SERVE:
+        serveFile(fileInfo, res);
+        sendGoogleAnalytics(method, headers, ip, originalUrl);
+        postToStats('serve', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
+        return fileInfo;
+      case SHOWLITE:
+        showFileLite(fileInfo, res);
+        postToStats('show', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
+        return fileInfo;
+      case SHOW:
+        return getShortClaimIdFromLongClaimId(fileInfo.claimId, fileInfo.name)
+        .then(shortId => {
+          fileInfo['shortId'] = shortId;
+          return resolveAgainstClaimTable(fileInfo.name, fileInfo.claimId);
+        })
+        .then(resolveResult => {
+          logger.debug('resolve result', resolveResult);
+          fileInfo['title'] = resolveResult.title;
+          fileInfo['description'] = resolveResult.description;
+          showFile(fileInfo, res);
+          postToStats('show', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
+          return fileInfo;
+        })
+        .catch(error => {
+          console.log('thowing error...');
+          throw error;
+        });
+      default:
+        logger.error('I did not recognize that method');
+        break;
+    }
+  },
 };

helpers/serveHelpers.js

@@ -10,16 +10,6 @@ function createOpenGraphInfo ({ fileType, claimId, name, fileName, fileExt }) {
   };
 }
 
-function getLongChannelId (channelName, channelId) {
-  if (channelId && (channelId.length === 40)) {  // full channel id
-    return new Promise((resolve, reject) => resolve(channelId));
-  } else if (channelId && channelId.length < 40) {  // short channel id
-    return getLongChannelIdFromShortChannelId(channelName, channelId);
-  } else {
-    return getLongChannelIdFromChannelName(channelName);
-  }
-};
-
 function getLongChannelIdFromShortChannelId (channelName, channelId) {
   return new Promise((resolve, reject) => {
     logger.debug(`finding long channel id for ${channelName}:${channelId}`);
@@ -61,125 +51,28 @@ function getLongChannelIdFromChannelName (channelName) {
   });
 }
 
-function getClaimIdByLongChannelId (channelId, claimName) {
+function sortResult (result, longId) {
-  return new Promise((resolve, reject) => {
+  let claimIndex;
-    logger.debug(`finding claim id for claim "${claimName}" from channel "${channelId}"`);
+  let shortId = longId.substring(0, 1); // default sort id is the first letter
-    db.sequelize.query(`SELECT claimId FROM Claim WHERE name = '${claimName}' AND certificateId = '${channelId}' LIMIT 1;`, { type: db.sequelize.QueryTypes.SELECT })
-    .then(result => {
-      switch (result.length) {
-        case 0:
-          return reject(new Error('There is no such claim for that channel'));
-        default:
-          return resolve(result[0].claimId);
-      }
-    })
-    .catch(error => {
-      reject(error);
-    });
-  });
-}
-
-function getAllChannelClaims (channelId) {
-  return new Promise((resolve, reject) => {
-    logger.debug(`finding all claims in channel "${channelId}"`);
-    db.sequelize.query(`SELECT * FROM Claim WHERE certificateId = '${channelId}' ORDeR BY height DESC;`, { type: db.sequelize.QueryTypes.SELECT })
-    .then(result => {
-      switch (result.length) {
-        case 0:
-          return resolve(null);
-        default:
-          return resolve(result);
-      }
-    })
-    .catch(error => {
-      reject(error);
-    });
-  });
-}
-
-function determineShortClaimId (claimId, height, claimList) {
-  logger.debug('determining short url based on claim id and claim list');
-  logger.debug('claimlist starting length:', claimList.length);
-  // remove this claim from the claim list, if it exists
-  claimList = claimList.filter(claim => {
-    return claim.claimId !== claimId;
-  });
-  logger.debug('claim list length without this claim:', claimList.length);
-  // If there are no other claims, return the first letter of the claim id...
-  if (claimList.length === 0) {
-    return claimId.substring(0, 1);
-  // ...otherwise determine the proper short id.
-  } else {
-    const claimListCopy = claimList;
-    let i = 0;
-    // find the longest shared prefix (there is a better way to do this that filters, checks next filter, then filters (i.e. combine this step and next))
-    while (claimList.length !== 0) {
-      i++;
-      claimList = claimList.filter(claim => {
-        const otherClaimIdSegmentToCompare = claim.claimId.substring(0, i);
-        const thisClaimIdSegmentToCompare = claimId.substring(0, i);
-        logger.debug('compare:', otherClaimIdSegmentToCompare, '===', thisClaimIdSegmentToCompare, '?');
-        return (otherClaimIdSegmentToCompare === thisClaimIdSegmentToCompare);
-      });
-    }
-    // use that longest shared prefix to get only those competing claims
-    const lastMatchIndex = i - 1;
-    const lastMatch = claimId.substring(0, lastMatchIndex);
-    logger.debug('last match index:', lastMatchIndex, 'last match:', lastMatch);
-    if (lastMatchIndex === 0) { // if no other claims share a prefix, return with first letter.
-      return claimId.substring(0, 1);
-    }
-    const allMatchingClaimsAtLastMatch = claimListCopy.filter(claim => {
-      return (claim.claimId.substring(0, lastMatchIndex) === lastMatch);
-    });
-    // for those that share the longest shared prefix: see which came first in time. whichever is earliest, the others take the extra character
-    const sortedMatchingClaims = allMatchingClaimsAtLastMatch.sort((a, b) => {
-      return (a.height < b.height);
-    });
-    // compare to the earliest one, if it is earlier, this claim takes the extra character
-    if (sortedMatchingClaims[0].height < height) {
-      return claimId.substring(0, lastMatchIndex + 1);
-    }
-    return claimId.substring(0, lastMatchIndex);
-  }
-}
-
-function getShortChannelId (channelName, longChannelId) {
-  return new Promise((resolve, reject) => {
-    logger.debug('finding short channel id');
-    db.sequelize.query(`SELECT claimId, height FROM Certificate WHERE name = '${channelName}' ORDER BY height;`, { type: db.sequelize.QueryTypes.SELECT })
-    .then(result => {
-      switch (result.length) {
-        case 0:
-          return reject(new Error('That is an invalid channel name'));
-        default:
-          let certificateIndex;
-          let shortId = longChannelId.substring(0, 1); // default sort id is the first letter
   let shortIdLength = 0;
   // find the index of this certificate
-          certificateIndex = result.findIndex(element => {
+  claimIndex = result.findIndex(element => {
-            return element.claimId === longChannelId;
+    return element.claimId === longId;
   });
-          if (certificateIndex < 0) { throw new Error('claimid not found in possible sorted list') }
+  if (claimIndex < 0) { throw new Error('claimid not found in possible sorted list') }
   // get an array of all certificates with lower height
-          let possibleMatches = result.slice(0, certificateIndex);
+  let possibleMatches = result.slice(0, claimIndex);
   // remove certificates with the same prefixes until none are left.
   while (possibleMatches.length > 0) {
     shortIdLength += 1;
-            shortId = longChannelId.substring(0, shortIdLength);
+    shortId = longId.substring(0, shortIdLength);
     possibleMatches = possibleMatches.filter(element => {
       return (element.claimId.substring(0, shortIdLength) === shortId);
     });
   }
   // return the short Id
   logger.debug('short channel id ===', shortId);
-          return resolve(shortId);
+  return shortId;
-      }
-    })
-    .catch(error => {
-      reject(error);
-    });
-  });
 }
 
 module.exports = {
@@ -233,18 +126,16 @@ module.exports = {
       });
     });
   },
-  getShortIdFromClaimId (claimId, height, name) {
+  getShortClaimIdFromLongClaimId (claimId, claimName) {
     return new Promise((resolve, reject) => {
-      logger.debug('finding short claim id from full claim id');
+      logger.debug('finding short channel id');
-      db.sequelize.query(`SELECT claimId, height FROM Claim WHERE name = '${name}' ORDER BY claimId;`, { type: db.sequelize.QueryTypes.SELECT })
+      db.sequelize.query(`SELECT claimId, height FROM Claim WHERE name = '${claimName}' ORDER BY height;`, { type: db.sequelize.QueryTypes.SELECT })
       .then(result => {
         switch (result.length) {
           case 0:
             return reject(new Error('That is an invalid claim name'));
-          default: // note results must be sorted
+          default:
-            const shortId = determineShortClaimId(claimId, height, result);
+            return resolve(sortResult(result, claimId));
-            logger.debug('short claim id ===', shortId);
-            return resolve(shortId);
         }
       })
       .catch(error => {
@@ -302,47 +193,60 @@ module.exports = {
       });
     });
   },
-  getClaimIdByChannel (channelName, channelId, claimName) {
+  getClaimIdByLongChannelId (channelId, claimName) {
     return new Promise((resolve, reject) => {
-      // 1. get the long channel id
+      logger.debug(`finding claim id for claim "${claimName}" from channel "${channelId}"`);
-      getLongChannelId(channelName, channelId)
+      db.sequelize.query(`SELECT claimId FROM Claim WHERE name = '${claimName}' AND certificateId = '${channelId}' LIMIT 1;`, { type: db.sequelize.QueryTypes.SELECT })
-      // 2. get the claim Id
+      .then(result => {
-      .then(longChannelId => {
+        switch (result.length) {
-        return getClaimIdByLongChannelId(longChannelId, claimName);
+          case 0:
-      })
+            return reject(new Error('There is no such claim for that channel'));
-      .then(claimId => {
+          default:
-        return resolve(claimId);
+            return resolve(result[0].claimId);
+        }
       })
       .catch(error => {
         reject(error);
       });
     });
   },
-  getChannelContents (channelName, channelId) {
+  getAllChannelClaims (channelId) {
     return new Promise((resolve, reject) => {
-      let longChannelId;
+      logger.debug(`finding all claims in channel "${channelId}"`);
-      let shortChannelId;
+      db.sequelize.query(`SELECT * FROM Claim WHERE certificateId = '${channelId}' ORDeR BY height DESC;`, { type: db.sequelize.QueryTypes.SELECT })
-      // 1. get the long channel Id
-      getLongChannelId(channelName, channelId)
-      // 2. get all claims for that channel
       .then(result => {
-        longChannelId = result;
+        switch (result.length) {
-        return getShortChannelId(channelName, longChannelId);
+          case 0:
-      })
+            return resolve(null);
-      .then(result => {
+          default:
-        shortChannelId = result;
+            return resolve(result);
-        return getAllChannelClaims(longChannelId);
+        }
-      })
+      })
-      .then(allChannelClaims => {
+      .catch(error => {
-        if (allChannelClaims) {
+        reject(error);
-          allChannelClaims.forEach(element => {
+      });
-            element['channelName'] = channelName;
+    });
-            element['longChannelId'] = longChannelId;
+  },
-            element['shortChannelId'] = shortChannelId;
+  getLongChannelId (channelName, channelId) {
-            element['fileExtension'] = element.contentType.substring(element.contentType.lastIndexOf('/') + 1);
+    if (channelId && (channelId.length === 40)) {  // full channel id
-          });
+      return new Promise((resolve, reject) => resolve(channelId));
+    } else if (channelId && channelId.length < 40) {  // short channel id
+      return getLongChannelIdFromShortChannelId(channelName, channelId);
+    } else {
+      return getLongChannelIdFromChannelName(channelName);
+    }
+  },
+  getShortChannelIdFromLongChannelId (channelName, longChannelId) {
+    return new Promise((resolve, reject) => {
+      logger.debug('finding short channel id');
+      db.sequelize.query(`SELECT claimId, height FROM Certificate WHERE name = '${channelName}' ORDER BY height;`, { type: db.sequelize.QueryTypes.SELECT })
+      .then(result => {
+        switch (result.length) {
+          case 0:
+            return reject(new Error('That is an invalid channel name'));
+          default:
+            return resolve(sortResult(result, longChannelId));
         }
-        return resolve(allChannelClaims);
       })
       .catch(error => {
         reject(error);

routes/serve-routes.js

@@ -1,8 +1,6 @@
 const logger = require('winston');
-const { serveFile, showFile, showFileLite, getShortIdFromClaimId, resolveAgainstClaimTable, getChannelContents } = require('../helpers/serveHelpers.js');
+const { getAssetByShortId, getAssetByClaimId, getAssetByName, getChannelContents, getAssetByChannel, serveOrShowAsset } = require('../controllers/serveController.js');
-const { getAssetByChannel, getAssetByShortId, getAssetByClaimId, getAssetByName } = require('../controllers/serveController.js');
 const { handleRequestError } = require('../helpers/errorHandlers.js');
-const { postToStats, sendGoogleAnalytics } = require('../controllers/statsController.js');
 const SERVE = 'SERVE';
 const SHOW = 'SHOW';
 const SHOWLITE = 'SHOWLITE';
@@ -27,48 +25,6 @@ function getAsset (claimType, channelName, channelId, shortId, fullClaimId, name
   }
 }
 
-function serveOrShowAsset (fileInfo, extension, method, headers, originalUrl, ip, res) {
-  // add file extension to the file info
-  if (extension === '.gifv') {
-    fileInfo['fileExt'] = '.gifv';
-  } else {
-    fileInfo['fileExt'] = fileInfo.fileName.substring(fileInfo.fileName.lastIndexOf('.'));
-  }
-  // serve or show
-  switch (method) {
-    case SERVE:
-      serveFile(fileInfo, res);
-      sendGoogleAnalytics(method, headers, ip, originalUrl);
-      postToStats('serve', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
-      return fileInfo;
-    case SHOWLITE:
-      showFileLite(fileInfo, res);
-      postToStats('show', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
-      return fileInfo;
-    case SHOW:
-      return getShortIdFromClaimId(fileInfo.claimId, fileInfo.height, fileInfo.name)
-      .then(shortId => {
-        fileInfo['shortId'] = shortId;
-        return resolveAgainstClaimTable(fileInfo.name, fileInfo.claimId);
-      })
-      .then(resolveResult => {
-        logger.debug('resolve result', resolveResult);
-        fileInfo['title'] = resolveResult.title;
-        fileInfo['description'] = resolveResult.description;
-        showFile(fileInfo, res);
-        postToStats('show', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
-        return fileInfo;
-      })
-      .catch(error => {
-        console.log('thowing error...');
-        throw error;
-      });
-    default:
-      logger.error('I did not recognize that method');
-      break;
-  }
-}
-
 function isValidClaimId (claimId) {
   return ((claimId.length === 40) && !/[^A-Za-z0-9]/g.test(claimId));
 }