From 9806d9e094271f76c99589d252a57117d35ae7e5 Mon Sep 17 00:00:00 2001
From: Harald Eilertsen <haraldei@anduin.net>
Date: Mon, 29 Jul 2019 11:02:32 +0200
Subject: Abstract away type of stored data in an Item.

Currently this seems rather pointless, but will make more sense when
we need to store arrays in the Item data set.
---
 src/client.rs |  3 ++-
 src/item.rs   | 39 ++++++++++++++++++++++++++++++++++++---
 2 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/src/client.rs b/src/client.rs
index e1561bf..95643a1 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -128,7 +128,8 @@ impl Client {
         handle_result(res)
     }
 
-    pub fn post_multipart(&self, path: &str, data: &BTreeMap<&str, &str>, files: &Vec<&str>) -> Result<String, Error>
+    pub fn post_multipart<T>(&self, path: &str, data: &BTreeMap<&str, T>, files: &Vec<&str>) -> Result<String, Error>
+        where T: ToString,
     {
         let url = dbg!(self.url(path, &()));
         let mut form = reqwest::multipart::Form::new();
diff --git a/src/item.rs b/src/item.rs
index 510918f..09ec4c0 100644
--- a/src/item.rs
+++ b/src/item.rs
@@ -18,8 +18,41 @@ use crate::{
     client::{self, Client},
     error::Error,
 };
+use serde::{Serialize, Serializer};
 use std::collections::BTreeMap;
 
+
+/// Data type for values that an Item can hold.
+pub enum ItemData<'a> {
+    /// A single value, either textual or numeric.
+    Value(&'a str),
+}
+
+impl<'a> From<&'a str> for ItemData<'a> {
+    fn from(orig: &'a str) -> ItemData<'a> {
+        ItemData::Value(orig)
+    }
+}
+
+impl<'a> Serialize for ItemData<'a> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer
+    {
+        match &self {
+            ItemData::Value(s) => s.serialize(serializer),
+        }
+    }
+}
+
+impl<'a> ToString for ItemData<'a> {
+    fn to_string(&self) -> String {
+        match &self {
+            ItemData::Value(s) => s.to_string(),
+        }
+    }
+}
+
 /// A structure to help you create an item in a declarative way.
 ///
 /// Typical usage:
@@ -35,7 +68,7 @@ use std::collections::BTreeMap;
 /// ```
 pub struct ItemBuilder<'a> {
     client : &'a Client,
-    data : BTreeMap<&'a str, &'a str>,
+    data : BTreeMap<&'a str, ItemData<'a>>,
     files: Vec<&'a str>,
 }
 
@@ -50,13 +83,13 @@ impl<'a> ItemBuilder<'a> {
 
     /// Add a title to the post
     pub fn title(&mut self, text: &'a str) -> &mut ItemBuilder<'a> {
-        self.data.insert("title", text);
+        self.data.insert("title", ItemData::Value(text));
         self
     }
 
     /// Add the body of the post
     pub fn body(&mut self, text: &'a str) -> &mut ItemBuilder<'a> {
-        self.data.insert("body", text);
+        self.data.insert("body", ItemData::Value(text));
         self
     }
 
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