large rewrite to make mize run on every platform

src/core/memstore.rs

@@ -0,0 +1,35 @@
+use std::collections::HashMap;
+use cbor::Cbor as CborValue;
+
+use crate::id::MizeId;
+use crate::instance::store::Store;
+use crate::error::MizeResult;
+use crate::item::{Item, ItemData};
+
+pub struct MemStore {
+    map: HashMap<MizeId, CborValue>,
+    next_id: u64,
+}
+
+impl Store for MemStore {
+    fn set<T: Into<ItemData>>(mut self, id: MizeId, data: T) -> MizeResult<()> {
+        self.map.insert(id, data.into());
+        return Ok(())
+    }
+    fn get_links(self, item: Item<Self>) -> MizeResult<Vec<MizeId>> {
+        Ok(Vec::new())
+    }
+    fn get_backlinks(self, item: Item<Self>) -> MizeResult<Vec<MizeId>> {
+        Ok(Vec::new())
+    }
+    fn new_id(&self) -> MizeResult<MizeId> {
+        let id_string = format!("{}", self.next_id);
+        return Ok(id_string.into());
+    }
+}
+
+impl MemStore {
+    pub fn new() -> MemStore {
+        return MemStore { map: HashMap::new(), next_id: 0 };
+    }
+}