From 390bf64858e03b948a9b65fe138b34dd2776f8ef Mon Sep 17 00:00:00 2001
From: Carlo Nucera <carlo.nucera@protonmail.com>
Date: Tue, 2 Jun 2020 14:15:38 -0400
Subject: [PATCH] WIP

---
 src/libstore/derivations.hh |  1 -
 src/libstore/file-hash.cc   | 55 ++++++++++++++++++++++++++++++++++++-
 2 files changed, 54 insertions(+), 2 deletions(-)

diff --git a/src/libstore/derivations.hh b/src/libstore/derivations.hh
index e314beac1..dba9318d9 100644
--- a/src/libstore/derivations.hh
+++ b/src/libstore/derivations.hh
@@ -24,7 +24,6 @@ struct DerivationOutput
     DerivationOutput(const DerivationOutput &) = default;
     DerivationOutput(DerivationOutput &&) = default;
     DerivationOutput & operator = (const DerivationOutput &) = default;
-    void parseHashInfo(FileIngestionMethod & recursive, Hash & hash) const;
 };
 
 typedef std::map<string, DerivationOutput> DerivationOutputs;
diff --git a/src/libstore/file-hash.cc b/src/libstore/file-hash.cc
index 4a3280653..9cae8f80e 100644
--- a/src/libstore/file-hash.cc
+++ b/src/libstore/file-hash.cc
@@ -40,7 +40,60 @@ std::string renderContentAddress(ContentAddress ca) {
 }
 
 ContentAddress parseContentAddress(std::string_view rawCa) {
-    throw Error("TODO");
+    auto prefixSeparator = rawCa.find(':');
+    if (prefixSeparator != string::npos) {
+        auto prefix = string(rawCa, 0, prefixSeparator);
+        if (prefix == "text") {
+            auto hashTypeAndHash = rawCa.substr(prefixSeparator+1, string::npos);
+            auto hashSeparator = hashTypeAndHash.find(':');
+            if (hashSeparator != string::npos) {
+                std::string_view hashTypeRaw = hashTypeAndHash.substr(0, hashSeparator);
+                std::string_view hashRaw     = hashTypeAndHash.substr(hashSeparator+1, string::npos);
+                auto hashType = parseHashType(string(hashTypeRaw));
+                return TextHash { Hash(string(hashRaw), hashType) };
+            } else {
+                throw "parseContentAddress: hash type not found";
+            }
+        } else if (prefix == "fixed") {
+            auto methodAndHash = rawCa.substr(prefixSeparator+1, string::npos);
+            if (methodAndHash.substr(0,2) == "r:") {
+                std::string_view hashRaw = methodAndHash.substr(2,string::npos);
+                return FileSystemHash { FileIngestionMethod::Recursive,  }
+            }
+
+
+
+        //     break;
+        // } else {
+        //     throw "parseContentAddress: invalid prefix";
+        }
+
+    } else {
+        throw "Not a content address because it lacks an appropriate prefix";
+    }
+
+
+
+    // if (getString(rawCa, 5) == "text:") {
+    //     auto hashTypeAndHash = string::substr(5, string::npos);
+    //     auto sep = hashTypeAndHash.find(':');
+    //     if (sep != string::npos) {
+    //         string hashTypeRaw = string(hashTypeAndHash, 0, sep);
+    //         auto hashType = parseHashType(hashTypeRaw);
+    //     }
+    //     break;
+
+    // // } else if (getString (rawCa, 6) = "fixed:") {
+    // } else if (true) {
+    //     break;
+    // }
+
+    // auto sep = rawCa.find(':');
+    // if (sep == string::npos)
+    // if(string(rawCa, 5) == "text:") {
+    //     break;
+    // } else if {}
+    // throw Error("TODO");
 };
 
 std::optional<ContentAddress> parseContentAddressOpt(std::string_view rawCaOpt) {