add beginnings of nodedb

src/NodeDB.cpp

@@ -0,0 +1,102 @@
+
+#include <Arduino.h>
+#include <assert.h>
+
+#include <pb_encode.h>
+#include <pb_decode.h>
+#include "mesh-pb-constants.h"
+#include "NodeDB.h"
+
+NodeDB nodeDB;
+
+/**
+ * get our starting (provisional) nodenum from flash.  But check first if anyone else is using it, by trying to send a message to it (arping)
+ */
+static NodeNum getDesiredNodeNum()
+{
+    uint8_t dmac[6];
+    esp_efuse_mac_get_default(dmac);
+
+    // FIXME not the right way to guess node numes
+    uint8_t r = dmac[5];
+    assert(r != 0xff); // It better not be the broadcast address
+    return r;
+}
+
+NodeDB::NodeDB() : ourNodeNum(getDesiredNodeNum()), numNodes(0)
+{
+}
+
+/// return number msecs since 1970
+uint64_t getCurrentTime() {
+    return 4403; // FIXME
+}
+
+/// given a subpacket sniffed from the network, update our DB state
+/// we updateGUI and updateGUIforNode if we think our this change is big enough for a redraw
+void NodeDB::updateFrom(const MeshPacket &mp)
+{
+    if (mp.has_payload)
+    {
+        const SubPacket &p = mp.payload;
+        Serial.printf("Update DB node %x for %d\n", mp.from, p.which_variant);
+        if (p.which_variant != SubPacket_want_node_tag) // we don't create nodeinfo records for someone that is just trying to claim a nodenum
+        {
+            int oldNumNodes = numNodes;
+            NodeInfo *info = getOrCreateNode(mp.from);
+
+            if (oldNumNodes != numNodes)
+                updateGUI = true; // we just created a nodeinfo
+
+            info->last_seen.msecs = getCurrentTime();
+            info->has_last_seen = true;
+            
+            switch (p.which_variant)
+            {
+            case SubPacket_position_tag:
+                info->position = p.variant.position;
+                info->has_position = true;
+                updateGUIforNode = info;
+                break;
+
+            case SubPacket_user_tag:
+                info->user = p.variant.user;
+                info->has_user = true;
+                updateGUIforNode = info;
+                break;
+
+            default:
+                break; // Ignore other packet types
+            }
+        }
+    }
+}
+
+/// Find a node in our DB, return null for missing
+NodeInfo *NodeDB::getNode(NodeNum n)
+{
+    for (int i = 0; i < numNodes; i++)
+        if (nodes[i].num == n)
+            return &nodes[i];
+
+    return NULL;
+}
+
+/// Find a node in our DB, create an empty NodeInfo if missing
+NodeInfo *NodeDB::getOrCreateNode(NodeNum n)
+{
+    NodeInfo *info = getNode(n);
+
+    if (!n)
+    {
+        // add the node
+        assert(numNodes < MAX_NUM_NODES);
+        info = &nodes[numNodes++];
+
+        // everything is missing except the nodenum
+        memset(info, 0, sizeof(*info));
+        info->num = n;
+    }
+
+    return info;
+}