Initial aether32 school lab bench tool

Co-authored-by: Cursor <cursoragent@cursor.com>

src/components/config_store.cpp

@@ -0,0 +1,99 @@
+#include "config_store.h"
+#include <LittleFS.h>
+
+#define CFG_FILE "/cfg.dat"
+#define SEP      '\x01'
+
+AutoRunConfig g_autorun = {false, false, 3500, "elevated", ""};
+
+static bool is_allowed_shell(const char *shell)
+{
+    return strcmp(shell, "elevated") == 0 ||
+           strcmp(shell, "cmd") == 0 ||
+           strcmp(shell, "powershell") == 0 ||
+           strcmp(shell, "run") == 0;
+}
+
+static void sanitize_stored_field(char *s, size_t maxlen)
+{
+    size_t out = 0;
+    for (size_t i = 0; s[i] && out < maxlen - 1; i++)
+    {
+        unsigned char c = (unsigned char)s[i];
+        if (c == SEP || c < 0x20)
+            continue;
+        s[out++] = s[i];
+    }
+    s[out] = '\0';
+}
+
+void config_load()
+{
+    File f = LittleFS.open(CFG_FILE, "r");
+    if (!f) return;
+
+    String line;
+    while (f.available())
+    {
+        char c = (char)f.read();
+        if (c == '\n' || c == '\r') break;
+        line += c;
+    }
+    f.close();
+
+    if (line.length() == 0) return;
+
+    int p0 = line.indexOf(SEP);       if (p0 < 0) return;
+    int p1 = line.indexOf(SEP, p0+1); if (p1 < 0) return;
+    int p2 = line.indexOf(SEP, p1+1); if (p2 < 0) return;
+    int p3 = line.indexOf(SEP, p2+1);
+
+    g_autorun.enabled  = (line.substring(0, p0) == "1");
+
+    int d = line.substring(p0+1, p1).toInt();
+    g_autorun.delay_ms = (d < 500 || d > 15000) ? 3500 : d;
+
+    strncpy(g_autorun.shell, line.substring(p1+1, p2).c_str(), sizeof(g_autorun.shell)-1);
+    g_autorun.shell[sizeof(g_autorun.shell)-1] = '\0';
+    if (!is_allowed_shell(g_autorun.shell))
+        strncpy(g_autorun.shell, "run", sizeof(g_autorun.shell));
+
+    if (p3 >= 0)
+    {
+        strncpy(g_autorun.cmd, line.substring(p2 + 1, p3).c_str(), sizeof(g_autorun.cmd) - 1);
+        g_autorun.cmd[sizeof(g_autorun.cmd) - 1] = '\0';
+        g_autorun.lab_scan_on_plug = (line.substring(p3 + 1) == "1");
+    }
+    else
+    {
+        strncpy(g_autorun.cmd, line.substring(p2 + 1).c_str(), sizeof(g_autorun.cmd) - 1);
+        g_autorun.cmd[sizeof(g_autorun.cmd) - 1] = '\0';
+        g_autorun.lab_scan_on_plug = false;
+    }
+    sanitize_stored_field(g_autorun.cmd, sizeof(g_autorun.cmd));
+}
+
+bool config_save()
+{
+    sanitize_stored_field(g_autorun.shell, sizeof(g_autorun.shell));
+    sanitize_stored_field(g_autorun.cmd, sizeof(g_autorun.cmd));
+    if (!is_allowed_shell(g_autorun.shell))
+        strncpy(g_autorun.shell, "run", sizeof(g_autorun.shell));
+
+    LittleFS.remove(CFG_FILE);
+    File f = LittleFS.open(CFG_FILE, "w");
+    if (!f) return false;
+
+    f.print(g_autorun.enabled ? "1" : "0");
+    f.print((char)SEP);
+    f.print(g_autorun.delay_ms);
+    f.print((char)SEP);
+    f.print(g_autorun.shell);
+    f.print((char)SEP);
+    f.print(g_autorun.cmd);
+    f.print((char)SEP);
+    f.print(g_autorun.lab_scan_on_plug ? "1" : "0");
+    f.print('\n');
+    f.close();
+    return true;
+}