standardize pin calculation routine

scripts/pinned.js

@@ -4,6 +4,7 @@ const Path = require("path");
 const Semaphore = require('saferphore');
 const Once = require("../lib/once");
 const nThen = require('nthen');
+const Pins = require("../lib/pins");
 
 const sema = Semaphore.create(20);
 
@@ -11,38 +12,6 @@ let dirList;
 const fileList = [];
 const pinned = {};
 
-// FIXME this seems to be duplicated in a few places.
-// make it a library and put it in ./lib/
-const checkPinStatus = (pinFile, fileName) => {
-    var pins = {};
-    pinFile.split('\n').filter((x)=>(x)).map((l) => JSON.parse(l)).forEach((l) => {
-        switch (l[0]) {
-            case 'RESET': {
-                pins = {};
-                if (l[1] && l[1].length) { l[1].forEach((x) => { pins[x] = 1; }); }
-                //jshint -W086
-                // fallthrough
-            }
-            case 'PIN': {
-                l[1].forEach((x) => { pins[x] = 1; });
-                break;
-            }
-            case 'UNPIN': {
-                l[1].forEach((x) => { delete pins[x]; });
-                break;
-            }
-            default:
-                // TODO write to the error log
-                /* Log.error('CORRUPTED_PIN_LOG', {
-                    line: JSON.stringify(l),
-                    fileName: fileName,
-                }); */
-                console.error(new Error (JSON.stringify(l) + '  ' + fileName));
-        }
-    });
-    return Object.keys(pins);
-};
-
 module.exports.load = function (cb, config) {
     var pinPath = config.pinPath || './pins';
     var done = Once(cb);
@@ -84,7 +53,7 @@ module.exports.load = function (cb, config) {
                         waitFor.abort();
                         return void done(err);
                     }
-                    const hashes = checkPinStatus(content.toString('utf8'), f);
+                    const hashes = Pins.calculateFromLog(content.toString('utf8'), f);
                     hashes.forEach((x) => {
                         (pinned[x] = pinned[x] || {})[f.replace(/.*\/([^/]*).ndjson$/, (x, y)=>y)] = 1;
                     });