From e5d610270bed47a91ecca8d51adc705bed58cda7 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Sat, 4 Dec 2021 17:03:09 +0100
Subject: Rewrite using "ipfs" crate

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
---
 src/types/payload.rs | 58 +++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 53 insertions(+), 5 deletions(-)

(limited to 'src/types/payload.rs')

diff --git a/src/types/payload.rs b/src/types/payload.rs
index cb12845..a11b215 100644
--- a/src/types/payload.rs
+++ b/src/types/payload.rs
@@ -1,6 +1,10 @@
+use std::convert::TryFrom;
+
+use anyhow::Result;
+
 use crate::types::DateTime;
 
-#[derive(Debug, Eq, PartialEq, serde::Serialize, serde::Deserialize, getset::Getters)]
+#[derive(Debug, Eq, PartialEq, getset::Getters)]
 pub struct Payload {
     // TODO: Make this a mime::Mime, but as this type does not impl Serialize/Deserialize, we
     // cannot do this trivially yet
@@ -10,15 +14,59 @@ pub struct Payload {
     #[getset(get = "pub")]
     timestamp: DateTime,
 
-    content: crate::types::encodable_cid::EncodableCid,
+    content: ipfs::Cid,
+}
+
+impl Into<ipfs::Ipld> for Payload {
+    fn into(self) -> ipfs::Ipld {
+        let mut map = std::collections::BTreeMap::new();
+        map.insert(String::from("mime"), ipfs::Ipld::String(self.mime));
+        map.insert(String::from("timestamp"), self.timestamp.into());
+        map.insert(String::from("content"), ipfs::Ipld::Link(self.content));
+        ipfs::Ipld::Map(map)
+    }
+}
+
+impl TryFrom<ipfs::Ipld> for Payload {
+    type Error = anyhow::Error;
+
+    fn try_from(ipld: ipfs::Ipld) -> Result<Self> {
+        let missing_field = |name: &'static str| move || anyhow::anyhow!("Missing field {}", name);
+        let field_wrong_type = |name: &str, expty: &str| anyhow::bail!("Field {} has wrong type, expected {}", name, expty);
+        match ipld {
+            ipfs::Ipld::Map(map) => {
+                let mime = match map.get("mime").ok_or_else(missing_field("mime"))? {
+                    ipfs::Ipld::String(s) => s.to_owned(),
+                    _ => return field_wrong_type("mime", "String")
+                };
+
+                let timestamp = map.get("timestamp")
+                    .ok_or_else(missing_field("timestamp"))?;
+                let timestamp = DateTime::try_from(timestamp.clone())?; // TODO dont clone
+
+                let content = match map.get("content").ok_or_else(missing_field("content"))? {
+                    ipfs::Ipld::Link(cid) => cid.clone(),
+                    _ => return field_wrong_type("content", "Link")
+                };
+
+                Ok(Payload {
+                    mime,
+                    timestamp,
+                    content
+                })
+            },
+
+            _ => anyhow::bail!("Unexpected type, expected map"),
+        }
+    }
 }
 
 impl Payload {
-    pub fn new(mime: String, timestamp: DateTime, content: crate::cid::Cid) -> Self {
+    pub fn new(mime: String, timestamp: DateTime, content: ipfs::Cid) -> Self {
         Self { mime, timestamp, content: content.into() }
     }
 
-    pub fn content(&self) -> crate::cid::Cid {
-        self.content.clone().into()
+    pub fn content(&self) -> ipfs::Cid {
+        self.content.clone()
     }
 }
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