From 5f7fb5e7a9caaf6f5fe4d994e07bef367d41efd4 Mon Sep 17 00:00:00 2001
From: kaotisk <kaotisk@arching-kaos.org>
Date: Sat, 19 Aug 2023 23:27:38 +0300
Subject: Added routes to merkle leafs and file chunks

---
 api/routes/getMrk/index.js | 61 ++++++++++++++++++++++++++++++++++++++++++++++
 api/routes/getTr/index.js  | 61 ++++++++++++++++++++++++++++++++++++++++++++++
 api/routes/index.js        |  6 +++++
 3 files changed, 128 insertions(+)
 create mode 100644 api/routes/getMrk/index.js
 create mode 100644 api/routes/getTr/index.js

diff --git a/api/routes/getMrk/index.js b/api/routes/getMrk/index.js
new file mode 100644
index 0000000..7e48e1d
--- /dev/null
+++ b/api/routes/getMrk/index.js
@@ -0,0 +1,61 @@
+const { spawn } = require('child_process');
+const fs = require("fs");
+const config = require("../../config");
+
+/*
+ * Gets a local merkle leaf
+ *
+ * Returns:
+ *  the merkle leaf
+ *
+ */
+function fetchFmrk(mrk, res){
+    const command = spawn("cat",[config.workDir+"/fmrk/"+mrk]);
+    command.stdout.on("data", data => {
+    });
+
+    command.stderr.on("data", data => {
+            console.log(`stderr: ${data}`);
+    });
+
+    command.on('error', (error) => {
+            console.log(`error: ${error.message}`);
+    });
+
+    command.on("close", code => {
+        console.log(`child process exited with code ${code}`);
+
+        if ( code === 0 ) {
+            const path = config.workDir+"/fmrk/"+mrk;
+            console.log(path)
+            try {
+                if(fs.existsSync(path)){
+                    res.send(fs.readFileSync(path));
+                }
+            } catch (error) {
+                res.send({"error":error.message});
+            }
+        } else if ( code === 2){
+            res.send({"error":"The roof is on fire"});
+        } else {
+            res.send({"error":"invalid or unreachable"});
+        }
+    });
+};
+module.exports = (req, res) => {
+    console.log(req.params)
+    if ( (req.params.mrk) && req.params.mrk.length === 128 ){
+        regex= /[a-f0-9]{128}/;
+        if (regex.test(req.params.mrk)){
+            if (req.params.mrk === "QmbFMke1KXqnYyBBWxB74N4c5SBnJMVAiMNRcGu6x1AwQH" ){
+                res.send({error:"Genesis block"});
+            } else {
+                fetchFmrk(req.params.mrk,res);
+            }
+        } else {
+            res.send({error:"Invalid data: regexp failed to pass"});
+        }
+    } else {
+        res.send({error:"Invalid data: no valid zblock was provided"});
+    }
+}
diff --git a/api/routes/getTr/index.js b/api/routes/getTr/index.js
new file mode 100644
index 0000000..c3c058f
--- /dev/null
+++ b/api/routes/getTr/index.js
@@ -0,0 +1,61 @@
+const { spawn } = require('child_process');
+const fs = require("fs");
+const config = require("../../config");
+
+/*
+ * Gets a file chunk
+ *
+ * Returns:
+ *  the chunk
+ *
+ */
+function fetchFtr(tr, res){
+    const command = spawn("cat",[config.workDir+"/ftr/"+tr]);
+    command.stdout.on("data", data => {
+    });
+
+    command.stderr.on("data", data => {
+            console.log(`stderr: ${data}`);
+    });
+
+    command.on('error', (error) => {
+            console.log(`error: ${error.message}`);
+    });
+
+    command.on("close", code => {
+        console.log(`child process exited with code ${code}`);
+
+        if ( code === 0 ) {
+            const path = config.workDir+"/ftr/"+tr;
+            console.log(path)
+            try {
+                if(fs.existsSync(path)){
+                    res.send(fs.readFileSync(path));
+                }
+            } catch (error) {
+                res.send({"error":error.message});
+            }
+        } else if ( code === 2){
+            res.send({"error":"The roof is on fire"});
+        } else {
+            res.send({"error":"invalid or unreachable"});
+        }
+    });
+};
+module.exports = (req, res) => {
+    console.log(req.params)
+    if ( (req.params.tr) && req.params.tr.length === 128 ){
+        regex= /[a-f0-9]{128}/;
+        if (regex.test(req.params.tr)){
+            if (req.params.tr === "QmbFMke1KXqnYyBBWxB74N4c5SBnJMVAiMNRcGu6x1AwQH" ){
+                res.send({error:"Genesis block"});
+            } else {
+                fetchFtr(req.params.tr,res);
+            }
+        } else {
+            res.send({error:"Invalid data: regexp failed to pass"});
+        }
+    } else {
+        res.send({error:"Invalid data: no valid zblock was provided"});
+    }
+}
diff --git a/api/routes/index.js b/api/routes/index.js
index e697be7..3a2e413 100644
--- a/api/routes/index.js
+++ b/api/routes/index.js
@@ -11,6 +11,8 @@ const getZChain = require('./getZChain');
 const receiveZBlock = require('./receiveZBlock');
 const receiveZChain = require('./receiveZChain');
 const getZblock = require('./getZblock');
+const getMrk = require('./getMrk');
+const getTr = require('./getTr');
 const getAkid = require('./getAkid');
 const getInnerIPFSContent = require('./getInnerIPFSContent');
 const corsOptions = {
@@ -43,6 +45,10 @@ router.route(settings.URL_PREFIX+'/akid').get(getAkid);
 router.route(settings.URL_PREFIX+'/content').get(getInnerIPFSContent);
 // Returns zblock
 router.route(settings.URL_PREFIX+'/zblock/:zblock').get(getZblock);
+// Returns a mrk
+router.route(settings.URL_PREFIX+'/mrk/:mrk').get(getMrk);
+// Returns a tr
+router.route(settings.URL_PREFIX+'/tr/:tr').get(getTr);
 // Send a block to the node (zchain block)
 router.route(settings.URL_PREFIX+'/sblk').post(receiveZBlock);
 // Send a zchain link to the node (refering to a valid zchain out there)
-- 
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