script for history of single document

Author: Swhite215

couchdb/node/scripts/get-document-history.js

@@ -0,0 +1,104 @@
+const axios = require("axios");
+
+let database = process.argv[2];
+let documentID = process.argv[3];
+
+if (!process.argv[2] || !process.argv[3]) {
+    throw new Error("Missing required CLI arguments...");
+}
+
+let documentBaseURL = `http://localhost:5984/${database}/`;
+let revQuery = "?revs=true";
+
+(async function main() {
+
+    try {
+        // HTTP GET Request for Document
+        let response = await axios.get(documentBaseURL + documentID);
+
+        //Get Revision List for A Document in CouchDB Database
+        let document = response.data;
+        document.id = document._id;
+
+        let documentRevIDsArray = await getDocumentRevisionList(document);
+        let documentRevArray = await buildRevisionList(documentRevIDsArray);
+
+        // Get All Document Versions
+        let documentRev = {};
+
+        documentRev[document.id] = documentRevArray;
+        
+        let fullDocumentHistory = await gatherAllDocuments(documentRev);
+
+        // Log the Results
+        for (let documentGroup of fullDocumentHistory) {
+            console.log(`Document ${documentGroup.id} has ${documentGroup.documents.length} versions:`);
+
+            for (var i = 0; i < documentGroup.documents.length; i++) {
+                console.group();
+                console.log(documentGroup.documents[i]);
+                console.groupEnd();
+            }
+        }
+
+    } catch(e) {
+        console.log("Error retrieving all documents: ", e);
+    }
+
+}())
+
+// Function to Get All Partial Revision IDs for a Document
+async function getDocumentRevisionList(document) {
+    try {
+        let response = await axios.get(documentBaseURL + document.id + revQuery);
+        let documentRevIDsArray = response.data._revisions;
+        return documentRevIDsArray;
+
+    } catch(e) {
+        console.log("Error getting partial document revision list: ", e);
+    }
+}
+
+// Function to Get All Full Revision IDs for a Document
+async function buildRevisionList(documentRevIDsArray) {
+
+    let documentRevArray = [];
+    let startRevNum = documentRevIDsArray.start;
+    let docCounter = 0;
+
+    for (let i = startRevNum; i >= 1; i--) {
+        documentRevArray.push(i + "-" + documentRevIDsArray.ids[docCounter]);
+        docCounter++;
+    }
+
+    return documentRevArray;
+}
+
+// Function to Get All Documents of All Revisions
+async function gatherAllDocuments(fullDocumentRevArray) {
+    let allDocuments = [];
+
+    let documentIDs = Object.keys(fullDocumentRevArray);
+
+    for (let documentID of documentIDs) {
+        let documentData  = {
+            id: documentID,
+            documents: []
+        }
+
+        for (let rev of fullDocumentRevArray[documentID]) {
+            let documentRevURL = documentBaseURL + documentID + "?rev=" + rev;
+
+            try {
+                let document = await axios.get(documentRevURL);
+                documentData.documents.push(document.data);
+            } catch(e) {
+                console.log("Error getting full document revision list: ", e);
+            }
+        }
+
+        allDocuments.push(documentData);
+    }
+
+    return allDocuments;
+}